Bump version to 0.0.19

AutoBone PoseFrame file format rework and other related fixes

.editorconfig

@@ -0,0 +1,11 @@
+# This file is for unifying the coding style for different editors and IDEs
+# See editorconfig.org
+
+root = true
+
+[*]
+indent_style = tab
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true

.github/workflows/gradle.yml

@@ -1,48 +1,67 @@
 # This workflow will build a Java project with Gradle
 # For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
 
-name: Build SlimeVR Server with Gradle
+name: SlimeVR Server
 
-on:
-  push:
-    branches: [ main ]
-  pull_request:
-    branches: [ main ]
+on: [ push, pull_request ]
 
 jobs:
-  build:
-
+  test:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2.3.4
-    
-    - name: Clone Slime Java Commons
-      uses: actions/checkout@v2.3.4
-      with:
-        repository: Eirenliel/slime-java-commons
-        # Relative path under $GITHUB_WORKSPACE to place the repository
-        path: Slime Java Commons
-    
-    - name: Set up JDK 11
-      uses: actions/setup-java@v2.1.0
-      with:
-        java-version: '11'
-        distribution: 'adopt'
-        
-    - name: Grant execute permission for gradlew
-      run: chmod +x gradlew
-      
-    - name: Test with Gradle
-      run: ./gradlew clean test
-      
-    - name: Build with Gradle
-      run: ./gradlew clean serverJar
-      
-    - name: Upload the Server JAR as a Build Artifact
-      uses: actions/upload-artifact@v2.2.4
-      with:
-        # Artifact name
-        name: "SlimeVR-Server" # optional, default is artifact
-        # A file, directory or wildcard pattern that describes what to upload
-        path: build/libs/*
+      - uses: actions/checkout@v2.3.4
+
+      - name: Clone Slime Java Commons
+        uses: actions/checkout@v2.3.4
+        with:
+          repository: Eirenliel/slime-java-commons
+          # Relative path under $GITHUB_WORKSPACE to place the repository
+          path: Slime Java Commons
+
+      - name: Set up JDK 8
+        uses: actions/setup-java@v2.1.0
+        with:
+          java-version: '8'
+          distribution: 'adopt'
+          cache: 'gradle' # will restore cache of dependencies and wrappers
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Test with Gradle
+        run: ./gradlew clean test
+
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2.3.4
+
+      - name: Clone Slime Java Commons
+        uses: actions/checkout@v2.3.4
+        with:
+          repository: Eirenliel/slime-java-commons
+          # Relative path under $GITHUB_WORKSPACE to place the repository
+          path: Slime Java Commons
+
+      - name: Set up JDK 8
+        uses: actions/setup-java@v2.1.0
+        with:
+          java-version: '8'
+          distribution: 'adopt'
+          cache: 'gradle' # will restore cache of dependencies and wrappers
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Build with Gradle
+        run: ./gradlew clean shadowJar
+
+      - name: Upload the Server JAR as a Build Artifact
+        uses: actions/upload-artifact@v2.2.4
+        with:
+          # Artifact name
+          name: "SlimeVR-Server" # optional, default is artifact
+          # A file, directory or wildcard pattern that describes what to upload
+          path: build/libs/*

README.md

@@ -26,9 +26,9 @@ git clone https://github.com/Eirenliel/slime-java-commons.git
 
 # Enter the directory and build the runnable server JAR
 cd SlimeVR-Server
-gradlew serverJar
+gradlew shadowJar
 ```
 
 Open Slime VR Server project in Eclipse or Intellij Idea
 
-run gradle command `serverJar` to build a runnable server JAR
+run gradle command `shadowJar` to build a runnable server JAR

build.gradle

@@ -7,53 +7,69 @@
  */
 
 plugins {
-    // Apply the java-library plugin to add support for Java Library
-    id 'java-library'
+	id 'application'
+	id "com.github.johnrengelman.shadow" version "6.1.0"
+}
+
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
+
+// Set compiler to use UTF-8
+compileJava.options.encoding = 'UTF-8'
+compileTestJava.options.encoding = 'UTF-8'
+javadoc.options.encoding = 'UTF-8'
+
+tasks.withType(JavaCompile) {
+	options.encoding = 'UTF-8'
+	if (JavaVersion.current().isJava9Compatible()) {
+		// TODO: Gradle 6.6
+		// options.release = 8
+		options.compilerArgs.addAll(['--release', '8'])
+	}
+}
+tasks.withType(Test) {
+	systemProperty('file.encoding', 'UTF-8')
+}
+tasks.withType(Javadoc) {
+	options.encoding = 'UTF-8'
 }
 
 repositories {
-    // Use jcenter for resolving dependencies.
-    // You can declare any Maven/Ivy/file repository here.
-    jcenter()
-    mavenCentral()
+	// Use jcenter for resolving dependencies.
+	// You can declare any Maven/Ivy/file repository here.
+	jcenter()
+	mavenCentral()
 }
 
 dependencies {
 	compile project(':Slime Java Commons')
 
-    // This dependency is exported to consumers, that is to say found on their compile classpath.
-    compile 'org.apache.commons:commons-math3:3.6.1'
-    compile 'org.yaml:snakeyaml:1.25'
-    compile 'net.java.dev.jna:jna:5.6.0'
-    compile 'net.java.dev.jna:jna-platform:5.6.0'
-    compile 'com.illposed.osc:javaosc-core:0.8'
-    compile 'com.fazecast:jSerialComm:[2.0.0,3.0.0)'
+	// This dependency is exported to consumers, that is to say found on their compile classpath.
+	compile 'org.apache.commons:commons-math3:3.6.1'
+	compile 'org.yaml:snakeyaml:1.25'
+	compile 'net.java.dev.jna:jna:5.6.0'
+	compile 'net.java.dev.jna:jna-platform:5.6.0'
+	compile 'com.illposed.osc:javaosc-core:0.8'
+	compile 'com.fazecast:jSerialComm:[2.0.0,3.0.0)'
 
-    // This dependency is used internally, and not exposed to consumers on their own compile classpath.
-    implementation 'com.google.guava:guava:28.2-jre'
-    
+	// This dependency is used internally, and not exposed to consumers on their own compile classpath.
+	implementation 'com.google.guava:guava:28.2-jre'
 
-    // Use JUnit test framework
+
+	// Use JUnit test framework
 	testImplementation platform('org.junit:junit-bom:5.7.2')
 	testImplementation 'org.junit.jupiter:junit-jupiter'
 	testImplementation 'org.junit.platform:junit-platform-launcher'
 }
 test {
-    useJUnitPlatform()
+	useJUnitPlatform()
 }
 
-subprojects.each { subproject -> evaluationDependsOn(subproject.path) }
-task serverJar (type: Jar, dependsOn: subprojects.tasks['build']) {
-    // Make the JAR runnable
-    manifest {
-        attributes 'Main-Class': 'io.eiren.vr.Main'
-    }
-    
-    // Pack all dependencies within the JAR
-    from {
-        configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
-    }
-
-    // Add this project's classes in the JAR
-    with jar
+shadowJar {
+	archiveBaseName.set('slimevr')
+	archiveClassifier.set('')
+	archiveVersion.set('')
+}
+application {
+	mainClassName = 'io.eiren.vr.Main'
 }

resources/firewall.bat

@@ -0,0 +1,13 @@
+@echo off
+echo Installing firewall rules...
+
+rem Rotational data default port
+netsh advfirewall firewall add rule name="UDP 6969 incoming" dir=in action=allow protocol=UDP localport=6969
+netsh advfirewall firewall add rule name="UDP 6969 outgoing" dir=out action=allow protocol=UDP localport=6969
+
+rem Info server allowing automatic discovery
+netsh advfirewall firewall add rule name="UDP 35903 incoming" dir=in action=allow protocol=UDP localport=35903
+netsh advfirewall firewall add rule name="UDP 35903 outgoing" dir=out action=allow protocol=UDP localport=35903
+
+echo Done!
+pause

resources/run.bat

@@ -0,0 +1 @@
+@java -Xmx512M -jar slimevr.jar

src/main/java/dev/slimevr/autobone/AutoBone.java

@@ -0,0 +1,516 @@
+package dev.slimevr.autobone;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.function.Consumer;
+
+import com.jme3.math.Vector3f;
+
+import dev.slimevr.poserecorder.PoseFrame;
+import dev.slimevr.poserecorder.TrackerFrame;
+import dev.slimevr.poserecorder.TrackerFrameData;
+import io.eiren.util.ann.ThreadSafe;
+import io.eiren.util.logging.LogManager;
+import io.eiren.util.collections.FastList;
+import io.eiren.vr.VRServer;
+import io.eiren.vr.processor.HumanSkeleton;
+import io.eiren.vr.processor.HumanSkeletonWithLegs;
+import io.eiren.vr.processor.HumanSkeletonWithWaist;
+import io.eiren.vr.processor.TrackerBodyPosition;
+import io.eiren.vr.trackers.TrackerUtils;
+
+public class AutoBone {
+	
+	public class Epoch {
+		
+		public final int epoch;
+		public final float epochError;
+		
+		public Epoch(int epoch, float epochError) {
+			this.epoch = epoch;
+			this.epochError = epochError;
+		}
+		
+		@Override
+		public String toString() {
+			return "Epoch: " + epoch + ", Epoch Error: " + epochError;
+		}
+	}
+	
+	public int cursorIncrement = 1;
+	
+	public int minDataDistance = 2;
+	public int maxDataDistance = 32;
+	
+	public int numEpochs = 5;
+	
+	public float initialAdjustRate = 2.5f;
+	public float adjustRateDecay = 1.01f;
+	
+	public float slideErrorFactor = 1.0f;
+	public float offsetErrorFactor = 0.0f;
+	public float proportionErrorFactor = 0.2f;
+	public float heightErrorFactor = 0.1f;
+	public float positionErrorFactor = 0.0f;
+	public float positionOffsetErrorFactor = 0.0f;
+	
+	// Human average is probably 1.1235 (SD 0.07)
+	public float legBodyRatio = 1.1235f;
+	// SD of 0.07, capture 68% within range
+	public float legBodyRatioRange = 0.07f;
+	
+	// Assume these to be approximately half
+	public float kneeLegRatio = 0.5f;
+	public float chestWaistRatio = 0.5f;
+	
+	protected final VRServer server;
+	
+	protected HumanSkeletonWithLegs skeleton = null;
+	
+	// This is filled by reloadConfigValues()
+	public final HashMap<String, Float> configs = new HashMap<String, Float>();
+	public final HashMap<String, Float> staticConfigs = new HashMap<String, Float>();
+	
+	public final FastList<String> heightConfigs = new FastList<String>(new String[]{"Neck", "Waist", "Legs length"
+	});
+	
+	public AutoBone(VRServer server) {
+		this.server = server;
+		
+		reloadConfigValues();
+		
+		server.addSkeletonUpdatedCallback(this::skeletonUpdated);
+	}
+	
+	public void reloadConfigValues() {
+		reloadConfigValues(null);
+	}
+	
+	public void reloadConfigValues(TrackerFrame[] frame) {
+		// Load waist configs
+		staticConfigs.put("Head", server.config.getFloat("body.headShift", HumanSkeletonWithWaist.HEAD_SHIFT_DEFAULT));
+		staticConfigs.put("Neck", server.config.getFloat("body.neckLength", HumanSkeletonWithWaist.NECK_LENGTH_DEFAULT));
+		configs.put("Waist", server.config.getFloat("body.waistDistance", 0.85f));
+		
+		if(server.config.getBoolean("autobone.forceChestTracker", false) || (frame != null && TrackerUtils.findTrackerForBodyPosition(frame, TrackerBodyPosition.CHEST) != null) || TrackerUtils.findTrackerForBodyPosition(server.getAllTrackers(), TrackerBodyPosition.CHEST) != null) {
+			// If force enabled or has a chest tracker
+			configs.put("Chest", server.config.getFloat("body.chestDistance", 0.42f));
+		} else {
+			// Otherwise, make sure it's not used
+			configs.remove("Chest");
+			staticConfigs.put("Chest", server.config.getFloat("body.chestDistance", 0.42f));
+		}
+		
+		// Load leg configs
+		staticConfigs.put("Hips width", server.config.getFloat("body.hipsWidth", HumanSkeletonWithLegs.HIPS_WIDTH_DEFAULT));
+		configs.put("Legs length", server.config.getFloat("body.legsLength", 0.84f));
+		configs.put("Knee height", server.config.getFloat("body.kneeHeight", 0.42f));
+	}
+	
+	@ThreadSafe
+	public void skeletonUpdated(HumanSkeleton newSkeleton) {
+		if(newSkeleton instanceof HumanSkeletonWithLegs) {
+			skeleton = (HumanSkeletonWithLegs) newSkeleton;
+			applyConfigToSkeleton(newSkeleton);
+			LogManager.log.info("[AutoBone] Received updated skeleton");
+		}
+	}
+	
+	public void applyConfig() {
+		if(!applyConfigToSkeleton(skeleton)) {
+			// Unable to apply to skeleton, save directly
+			saveConfigs();
+		}
+	}
+	
+	public boolean applyConfigToSkeleton(HumanSkeleton skeleton) {
+		if(skeleton == null) {
+			return false;
+		}
+		
+		configs.forEach(skeleton::setSkeletonConfig);
+		
+		server.saveConfig();
+		
+		LogManager.log.info("[AutoBone] Configured skeleton bone lengths");
+		return true;
+	}
+	
+	private void setConfig(String name, String path) {
+		Float value = configs.get(name);
+		if(value != null) {
+			server.config.setProperty(path, value);
+		}
+	}
+	
+	// This doesn't require a skeleton, therefore can be used if skeleton is null
+	public void saveConfigs() {
+		setConfig("Head", "body.headShift");
+		setConfig("Neck", "body.neckLength");
+		setConfig("Waist", "body.waistDistance");
+		setConfig("Chest", "body.chestDistance");
+		setConfig("Hips width", "body.hipsWidth");
+		setConfig("Legs length", "body.legsLength");
+		setConfig("Knee height", "body.kneeHeight");
+		
+		server.saveConfig();
+	}
+	
+	public Float getConfig(String config) {
+		Float configVal = configs.get(config);
+		return configVal != null ? configVal : staticConfigs.get(config);
+	}
+	
+	public Float getConfig(String config, Map<String, Float> configs, Map<String, Float> configsAlt) {
+		if(configs == null) {
+			throw new NullPointerException("Argument \"configs\" must not be null");
+		}
+		
+		Float configVal = configs.get(config);
+		return configVal != null || configsAlt == null ? configVal : configsAlt.get(config);
+	}
+	
+	public float getHeight(Map<String, Float> configs) {
+		return getHeight(configs, null);
+	}
+	
+	public float getHeight(Map<String, Float> configs, Map<String, Float> configsAlt) {
+		float height = 0f;
+		
+		for(String heightConfig : heightConfigs) {
+			Float length = getConfig(heightConfig, configs, configsAlt);
+			if(length != null) {
+				height += length;
+			}
+		}
+		
+		return height;
+	}
+	
+	public float getLengthSum(Map<String, Float> configs) {
+		float length = 0f;
+		
+		for(float boneLength : configs.values()) {
+			length += boneLength;
+		}
+		
+		return length;
+	}
+	
+	public float getMaxHmdHeight(PoseFrame frames) {
+		float maxHeight = 0f;
+		for(TrackerFrame[] frame : frames) {
+			TrackerFrame hmd = TrackerUtils.findTrackerForBodyPosition(frame, TrackerBodyPosition.HMD);
+			if(hmd != null && hmd.hasData(TrackerFrameData.POSITION) && hmd.position.y > maxHeight) {
+				maxHeight = hmd.position.y;
+			}
+		}
+		return maxHeight;
+	}
+	
+	public void processFrames(PoseFrame frames) {
+		processFrames(frames, -1f);
+	}
+	
+	public void processFrames(PoseFrame frames, Consumer<Epoch> epochCallback) {
+		processFrames(frames, -1f, epochCallback);
+	}
+	
+	public void processFrames(PoseFrame frames, float targetHeight) {
+		processFrames(frames, true, targetHeight);
+	}
+	
+	public void processFrames(PoseFrame frames, float targetHeight, Consumer<Epoch> epochCallback) {
+		processFrames(frames, true, targetHeight, epochCallback);
+	}
+	
+	public float processFrames(PoseFrame frames, boolean calcInitError, float targetHeight) {
+		return processFrames(frames, calcInitError, targetHeight, null);
+	}
+	
+	public float processFrames(PoseFrame frames, boolean calcInitError, float targetHeight, Consumer<Epoch> epochCallback) {
+		final int frameCount = frames.getMaxFrameCount();
+		
+		final SimpleSkeleton skeleton1 = new SimpleSkeleton(configs, staticConfigs);
+		final TrackerFrame[] trackerBuffer1 = new TrackerFrame[frames.getTrackerCount()];
+		
+		frames.getFrames(0, trackerBuffer1);
+		reloadConfigValues(trackerBuffer1); // Reload configs and detect chest tracker from the first frame
+		
+		final SimpleSkeleton skeleton2 = new SimpleSkeleton(configs, staticConfigs);
+		final TrackerFrame[] trackerBuffer2 = new TrackerFrame[frames.getTrackerCount()];
+		
+		// If target height isn't specified, auto-detect
+		if(targetHeight < 0f) {
+			if(skeleton != null) {
+				targetHeight = getHeight(skeleton.getSkeletonConfig());
+				LogManager.log.warning("[AutoBone] Target height loaded from skeleton (Make sure you reset before running!): " + targetHeight);
+			} else {
+				float hmdHeight = getMaxHmdHeight(frames);
+				if(hmdHeight <= 0.50f) {
+					LogManager.log.warning("[AutoBone] Max headset height detected (Value seems too low, did you not stand up straight while measuring?): " + hmdHeight);
+				} else {
+					LogManager.log.info("[AutoBone] Max headset height detected: " + hmdHeight);
+				}
+				
+				// Estimate target height from HMD height
+				targetHeight = hmdHeight;
+			}
+		}
+		
+		for(int epoch = calcInitError ? -1 : 0; epoch < numEpochs; epoch++) {
+			float sumError = 0f;
+			int errorCount = 0;
+			
+			float adjustRate = epoch >= 0 ? (float) (initialAdjustRate / Math.pow(adjustRateDecay, epoch)) : 0f;
+			
+			for(int cursorOffset = minDataDistance; cursorOffset <= maxDataDistance && cursorOffset < frameCount; cursorOffset++) {
+				for(int frameCursor = 0; frameCursor < frameCount - cursorOffset; frameCursor += cursorIncrement) {
+					frames.getFrames(frameCursor, trackerBuffer1);
+					frames.getFrames(frameCursor + cursorOffset, trackerBuffer2);
+					
+					skeleton1.setSkeletonConfigs(configs);
+					skeleton2.setSkeletonConfigs(configs);
+					
+					skeleton1.setPoseFromFrame(trackerBuffer1);
+					skeleton2.setPoseFromFrame(trackerBuffer2);
+					
+					float totalLength = getLengthSum(configs);
+					float curHeight = getHeight(configs, staticConfigs);
+					float errorDeriv = getErrorDeriv(trackerBuffer1, trackerBuffer2, skeleton1, skeleton2, targetHeight - curHeight);
+					float error = errorFunc(errorDeriv);
+					
+					// In case of fire
+					if(Float.isNaN(error) || Float.isInfinite(error)) {
+						// Extinguish
+						LogManager.log.warning("[AutoBone] Error value is invalid, resetting variables to recover");
+						reloadConfigValues(trackerBuffer1);
+						
+						// Reset error sum values
+						sumError = 0f;
+						errorCount = 0;
+						
+						// Continue on new data
+						continue;
+					}
+					
+					// Store the error count for logging purposes
+					sumError += errorDeriv;
+					errorCount++;
+					
+					float adjustVal = error * adjustRate;
+					
+					for(Entry<String, Float> entry : configs.entrySet()) {
+						// Skip adjustment if the epoch is before starting (for logging only)
+						if(epoch < 0) {
+							break;
+						}
+						
+						float originalLength = entry.getValue();
+						
+						// Try positive and negative adjustments
+						boolean isHeightVar = heightConfigs.contains(entry.getKey());
+						float minError = errorDeriv;
+						float finalNewLength = -1f;
+						for(int i = 0; i < 2; i++) {
+							// Scale by the ratio for smooth adjustment and more stable results
+							float curAdjustVal = ((i == 0 ? adjustVal : -adjustVal) * originalLength) / totalLength;
+							float newLength = originalLength + curAdjustVal;
+							
+							// No small or negative numbers!!! Bad algorithm!
+							if(newLength < 0.01f) {
+								continue;
+							}
+							
+							updateSkeletonBoneLength(skeleton1, skeleton2, entry.getKey(), newLength);
+							
+							float newHeight = isHeightVar ? curHeight + curAdjustVal : curHeight;
+							float newErrorDeriv = getErrorDeriv(trackerBuffer1, trackerBuffer2, skeleton1, skeleton2, targetHeight - newHeight);
+							
+							if(newErrorDeriv < minError) {
+								minError = newErrorDeriv;
+								finalNewLength = newLength;
+							}
+						}
+						
+						if(finalNewLength > 0f) {
+							entry.setValue(finalNewLength);
+						}
+						
+						// Reset the length to minimize bias in other variables, it's applied later
+						updateSkeletonBoneLength(skeleton1, skeleton2, entry.getKey(), originalLength);
+					}
+				}
+			}
+			
+			// Calculate average error over the epoch
+			float avgError = errorCount > 0 ? sumError / errorCount : -1f;
+			LogManager.log.info("[AutoBone] Epoch " + (epoch + 1) + " average error: " + avgError);
+			
+			if(epochCallback != null) {
+				epochCallback.accept(new Epoch(epoch + 1, avgError));
+			}
+		}
+		
+		float finalHeight = getHeight(configs, staticConfigs);
+		LogManager.log.info("[AutoBone] Target height: " + targetHeight + " New height: " + finalHeight);
+		
+		return Math.abs(finalHeight - targetHeight);
+	}
+	
+	// The change in position of the ankle over time
+	protected float getSlideErrorDeriv(SimpleSkeleton skeleton1, SimpleSkeleton skeleton2) {
+		float slideLeft = skeleton1.getNodePosition(TrackerBodyPosition.LEFT_ANKLE).distance(skeleton2.getNodePosition(TrackerBodyPosition.LEFT_ANKLE));
+		float slideRight = skeleton1.getNodePosition(TrackerBodyPosition.RIGHT_ANKLE).distance(skeleton2.getNodePosition(TrackerBodyPosition.RIGHT_ANKLE));
+		
+		// Divide by 4 to halve and average, it's halved because you want to approach a midpoint, not the other point
+		return (slideLeft + slideRight) / 4f;
+	}
+	
+	// The offset between both feet at one instant and over time
+	protected float getOffsetErrorDeriv(SimpleSkeleton skeleton1, SimpleSkeleton skeleton2) {
+		float skeleton1Left = skeleton1.getNodePosition(TrackerBodyPosition.LEFT_ANKLE).getY();
+		float skeleton1Right = skeleton1.getNodePosition(TrackerBodyPosition.RIGHT_ANKLE).getY();
+		
+		float skeleton2Left = skeleton2.getNodePosition(TrackerBodyPosition.LEFT_ANKLE).getY();
+		float skeleton2Right = skeleton2.getNodePosition(TrackerBodyPosition.RIGHT_ANKLE).getY();
+		
+		float dist1 = Math.abs(skeleton1Left - skeleton1Right);
+		float dist2 = Math.abs(skeleton2Left - skeleton2Right);
+		
+		float dist3 = Math.abs(skeleton1Left - skeleton2Right);
+		float dist4 = Math.abs(skeleton2Left - skeleton1Right);
+		
+		float dist5 = Math.abs(skeleton1Left - skeleton2Left);
+		float dist6 = Math.abs(skeleton1Right - skeleton2Right);
+		
+		// Divide by 12 to halve and average, it's halved because you want to approach a midpoint, not the other point
+		return (dist1 + dist2 + dist3 + dist4 + dist5 + dist6) / 12f;
+	}
+	
+	// The distance from average human proportions
+	protected float getProportionErrorDeriv(SimpleSkeleton skeleton) {
+		Float neckLength = skeleton.getSkeletonConfig("Neck");
+		Float chestLength = skeleton.getSkeletonConfig("Chest");
+		Float waistLength = skeleton.getSkeletonConfig("Waist");
+		Float legsLength = skeleton.getSkeletonConfig("Legs length");
+		Float kneeHeight = skeleton.getSkeletonConfig("Knee height");
+		
+		float chestWaist = chestLength != null && waistLength != null ? Math.abs((chestLength / waistLength) - chestWaistRatio) : 0f;
+		float legBody = legsLength != null && waistLength != null && neckLength != null ? Math.abs((legsLength / (waistLength + neckLength)) - legBodyRatio) : 0f;
+		float kneeLeg = kneeHeight != null && legsLength != null ? Math.abs((kneeHeight / legsLength) - kneeLegRatio) : 0f;
+		
+		if(legBody <= legBodyRatioRange) {
+			legBody = 0f;
+		} else {
+			legBody -= legBodyRatioRange;
+		}
+		
+		return (chestWaist + legBody + kneeLeg) / 3f;
+	}
+	
+	// The distance of any points to the corresponding absolute position
+	protected float getPositionErrorDeriv(TrackerFrame[] frame, SimpleSkeleton skeleton) {
+		float offset = 0f;
+		int offsetCount = 0;
+		
+		for(TrackerFrame trackerFrame : frame) {
+			if(trackerFrame == null || !trackerFrame.hasData(TrackerFrameData.POSITION)) {
+				continue;
+			}
+			
+			Vector3f nodePos = skeleton.getNodePosition(trackerFrame.designation.designation);
+			if(nodePos != null) {
+				offset += Math.abs(nodePos.distance(trackerFrame.position));
+				offsetCount++;
+			}
+		}
+		
+		return offsetCount > 0 ? offset / offsetCount : 0f;
+	}
+	
+	// The difference between offset of absolute position and the corresponding point over time
+	protected float getPositionOffsetErrorDeriv(TrackerFrame[] frame1, TrackerFrame[] frame2, SimpleSkeleton skeleton1, SimpleSkeleton skeleton2) {
+		float offset = 0f;
+		int offsetCount = 0;
+		
+		for(TrackerFrame trackerFrame1 : frame1) {
+			if(trackerFrame1 == null || !trackerFrame1.hasData(TrackerFrameData.POSITION)) {
+				continue;
+			}
+			
+			TrackerFrame trackerFrame2 = TrackerUtils.findTrackerForBodyPosition(frame2, trackerFrame1.designation);
+			if(trackerFrame2 == null || !trackerFrame2.hasData(TrackerFrameData.POSITION)) {
+				continue;
+			}
+			
+			Vector3f nodePos1 = skeleton1.getNodePosition(trackerFrame1.designation);
+			if(nodePos1 == null) {
+				continue;
+			}
+			
+			Vector3f nodePos2 = skeleton2.getNodePosition(trackerFrame2.designation);
+			if(nodePos2 == null) {
+				continue;
+			}
+			
+			float dist1 = Math.abs(nodePos1.distance(trackerFrame1.position));
+			float dist2 = Math.abs(nodePos2.distance(trackerFrame2.position));
+			
+			offset += Math.abs(dist2 - dist1);
+			offsetCount++;
+		}
+		
+		return offsetCount > 0 ? offset / offsetCount : 0f;
+	}
+	
+	protected float getErrorDeriv(TrackerFrame[] frame1, TrackerFrame[] frame2, SimpleSkeleton skeleton1, SimpleSkeleton skeleton2, float heightChange) {
+		float totalError = 0f;
+		float sumWeight = 0f;
+		
+		if(slideErrorFactor > 0f) {
+			totalError += getSlideErrorDeriv(skeleton1, skeleton2) * slideErrorFactor;
+			sumWeight += slideErrorFactor;
+		}
+		
+		if(offsetErrorFactor > 0f) {
+			totalError += getOffsetErrorDeriv(skeleton1, skeleton2) * offsetErrorFactor;
+			sumWeight += offsetErrorFactor;
+		}
+		
+		if(proportionErrorFactor > 0f) {
+			// Either skeleton will work fine, skeleton1 is used as a default
+			totalError += getProportionErrorDeriv(skeleton1) * proportionErrorFactor;
+			sumWeight += proportionErrorFactor;
+		}
+		
+		if(heightErrorFactor > 0f) {
+			totalError += Math.abs(heightChange) * heightErrorFactor;
+			sumWeight += heightErrorFactor;
+		}
+		
+		if(positionErrorFactor > 0f) {
+			totalError += (getPositionErrorDeriv(frame1, skeleton1) + getPositionErrorDeriv(frame2, skeleton2) / 2f) * positionErrorFactor;
+			sumWeight += positionErrorFactor;
+		}
+		
+		if(positionOffsetErrorFactor > 0f) {
+			totalError += getPositionOffsetErrorDeriv(frame1, frame2, skeleton1, skeleton2) * positionOffsetErrorFactor;
+			sumWeight += positionOffsetErrorFactor;
+		}
+		
+		// Minimize sliding, minimize foot height offset, minimize change in total height
+		return sumWeight > 0f ? totalError / sumWeight : 0f;
+	}
+	
+	// Mean square error function
+	protected static float errorFunc(float errorDeriv) {
+		return 0.5f * (errorDeriv * errorDeriv);
+	}
+	
+	protected void updateSkeletonBoneLength(SimpleSkeleton skeleton1, SimpleSkeleton skeleton2, String joint, float newLength) {
+		skeleton1.setSkeletonConfig(joint, newLength, true);
+		skeleton2.setSkeletonConfig(joint, newLength, true);
+	}
+}

src/main/java/dev/slimevr/autobone/SimpleSkeleton.java

@@ -0,0 +1,352 @@
+package dev.slimevr.autobone;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import com.jme3.math.Quaternion;
+import com.jme3.math.Vector3f;
+
+import dev.slimevr.poserecorder.TrackerFrame;
+import dev.slimevr.poserecorder.TrackerFrameData;
+import io.eiren.vr.processor.HumanSkeletonWithLegs;
+import io.eiren.vr.processor.HumanSkeletonWithWaist;
+import io.eiren.vr.processor.TrackerBodyPosition;
+import io.eiren.vr.processor.TransformNode;
+import io.eiren.vr.trackers.TrackerUtils;
+import io.eiren.yaml.YamlFile;
+
+public class SimpleSkeleton {
+	
+	// Waist
+	protected final TransformNode hmdNode = new TransformNode("HMD", false);
+	protected final TransformNode headNode = new TransformNode("Head", false);
+	protected final TransformNode neckNode = new TransformNode("Neck", false);
+	protected final TransformNode waistNode = new TransformNode("Waist", false);
+	protected final TransformNode chestNode = new TransformNode("Chest", false);
+	
+	protected float chestDistance = 0.42f;
+	/**
+	 * Distance from eyes to waist
+	 */
+	protected float waistDistance = 0.85f;
+	/**
+	 * Distance from eyes to the base of the neck
+	 */
+	protected float neckLength = HumanSkeletonWithWaist.NECK_LENGTH_DEFAULT;
+	/**
+	 * Distance from eyes to ear
+	 */
+	protected float headShift = HumanSkeletonWithWaist.HEAD_SHIFT_DEFAULT;
+	
+	// Legs
+	protected final TransformNode leftHipNode = new TransformNode("Left-Hip", false);
+	protected final TransformNode leftKneeNode = new TransformNode("Left-Knee", false);
+	protected final TransformNode leftAnkleNode = new TransformNode("Left-Ankle", false);
+	protected final TransformNode rightHipNode = new TransformNode("Right-Hip", false);
+	protected final TransformNode rightKneeNode = new TransformNode("Right-Knee", false);
+	protected final TransformNode rightAnkleNode = new TransformNode("Right-Ankle", false);
+	
+	/**
+	 * Distance between centers of both hips
+	 */
+	protected float hipsWidth = HumanSkeletonWithLegs.HIPS_WIDTH_DEFAULT;
+	/**
+	 * Length from waist to knees
+	 */
+	protected float kneeHeight = 0.42f;
+	/**
+	 * Distance from waist to ankle
+	 */
+	protected float legsLength = 0.84f;
+	
+	protected final HashMap<String, TransformNode> nodes = new HashMap<String, TransformNode>();
+	
+	private Quaternion rotBuf1 = new Quaternion();
+	private Quaternion rotBuf2 = new Quaternion();
+	
+	public SimpleSkeleton() {
+		// Assemble skeleton to waist
+		hmdNode.attachChild(headNode);
+		headNode.localTransform.setTranslation(0, 0, headShift);
+		
+		headNode.attachChild(neckNode);
+		neckNode.localTransform.setTranslation(0, -neckLength, 0);
+		
+		neckNode.attachChild(chestNode);
+		chestNode.localTransform.setTranslation(0, -chestDistance, 0);
+		
+		chestNode.attachChild(waistNode);
+		waistNode.localTransform.setTranslation(0, -(waistDistance - chestDistance), 0);
+		
+		// Assemble skeleton to feet
+		waistNode.attachChild(leftHipNode);
+		leftHipNode.localTransform.setTranslation(-hipsWidth / 2, 0, 0);
+		
+		waistNode.attachChild(rightHipNode);
+		rightHipNode.localTransform.setTranslation(hipsWidth / 2, 0, 0);
+		
+		leftHipNode.attachChild(leftKneeNode);
+		leftKneeNode.localTransform.setTranslation(0, -(legsLength - kneeHeight), 0);
+		
+		rightHipNode.attachChild(rightKneeNode);
+		rightKneeNode.localTransform.setTranslation(0, -(legsLength - kneeHeight), 0);
+		
+		leftKneeNode.attachChild(leftAnkleNode);
+		leftAnkleNode.localTransform.setTranslation(0, -kneeHeight, 0);
+		
+		rightKneeNode.attachChild(rightAnkleNode);
+		rightAnkleNode.localTransform.setTranslation(0, -kneeHeight, 0);
+		
+		// Set up a HashMap to get nodes by name easily
+		hmdNode.depthFirstTraversal(visitor -> {
+			nodes.put(visitor.getName(), visitor);
+		});
+	}
+	
+	public SimpleSkeleton(Map<String, Float> configs, Map<String, Float> altConfigs) {
+		// Initialize
+		this();
+		
+		// Set configs
+		if(altConfigs != null) {
+			// Set alts first, so if there's any overlap it doesn't affect the values
+			setSkeletonConfigs(altConfigs);
+		}
+		setSkeletonConfigs(configs);
+	}
+	
+	public SimpleSkeleton(Map<String, Float> configs) {
+		this(configs, null);
+	}
+	
+	public void setPoseFromFrame(TrackerFrame[] frame) {
+		
+		TrackerFrame hmd = TrackerUtils.findTrackerForBodyPosition(frame, TrackerBodyPosition.HMD);
+		
+		if(hmd != null) {
+			if(hmd.hasData(TrackerFrameData.ROTATION)) {
+				hmdNode.localTransform.setRotation(hmd.rotation);
+				headNode.localTransform.setRotation(hmd.rotation);
+			}
+			
+			if(hmd.hasData(TrackerFrameData.POSITION)) {
+				hmdNode.localTransform.setTranslation(hmd.position);
+			}
+		}
+		
+		TrackerFrame chest = TrackerUtils.findTrackerForBodyPosition(frame, TrackerBodyPosition.CHEST, TrackerBodyPosition.WAIST);
+		setRotation(chest, neckNode);
+		
+		TrackerFrame waist = TrackerUtils.findTrackerForBodyPosition(frame, TrackerBodyPosition.WAIST, TrackerBodyPosition.CHEST);
+		setRotation(waist, chestNode);
+		
+		TrackerFrame leftLeg = TrackerUtils.findTrackerForBodyPosition(frame, TrackerBodyPosition.LEFT_LEG);
+		TrackerFrame rightLeg = TrackerUtils.findTrackerForBodyPosition(frame, TrackerBodyPosition.RIGHT_LEG);
+		
+		averagePelvis(waist, leftLeg, rightLeg);
+		
+		setRotation(leftLeg, leftHipNode);
+		setRotation(rightLeg, rightHipNode);
+		
+		TrackerFrame leftAnkle = TrackerUtils.findTrackerForBodyPosition(frame, TrackerBodyPosition.LEFT_ANKLE);
+		setRotation(leftAnkle, rightKneeNode);
+		
+		TrackerFrame rightAnkle = TrackerUtils.findTrackerForBodyPosition(frame, TrackerBodyPosition.RIGHT_ANKLE);
+		setRotation(rightAnkle, leftKneeNode);
+		
+		updatePose();
+	}
+	
+	public void setRotation(TrackerFrame trackerFrame, TransformNode node) {
+		if(trackerFrame != null && trackerFrame.hasData(TrackerFrameData.ROTATION)) {
+			node.localTransform.setRotation(trackerFrame.rotation);
+		}
+	}
+	
+	public void averagePelvis(TrackerFrame waist, TrackerFrame leftLeg, TrackerFrame rightLeg) {
+		if((leftLeg == null || rightLeg == null) || (!leftLeg.hasData(TrackerFrameData.ROTATION) || !rightLeg.hasData(TrackerFrameData.ROTATION))) {
+			setRotation(waist, waistNode);
+			return;
+		}
+		
+		if(waist == null || !waist.hasData(TrackerFrameData.ROTATION)) {
+			if(leftLeg.hasData(TrackerFrameData.ROTATION) && rightLeg.hasData(TrackerFrameData.ROTATION)) {
+				leftLeg.getRotation(rotBuf1);
+				rightLeg.getRotation(rotBuf2);
+				rotBuf1.nlerp(rotBuf2, 0.5f);
+				
+				waistNode.localTransform.setRotation(rotBuf1);
+			}
+			
+			return;
+		}
+		
+		// Average the pelvis with the waist rotation
+		leftLeg.getRotation(rotBuf1);
+		rightLeg.getRotation(rotBuf2);
+		rotBuf1.nlerp(rotBuf2, 0.5f);
+		
+		waist.getRotation(rotBuf2);
+		rotBuf1.nlerp(rotBuf2, 0.3333333f);
+		
+		waistNode.localTransform.setRotation(rotBuf1);
+	}
+	
+	public void setSkeletonConfigs(Map<String, Float> configs) {
+		configs.forEach(this::setSkeletonConfig);
+	}
+	
+	public void setSkeletonConfig(String joint, float newLength) {
+		setSkeletonConfig(joint, newLength, false);
+	}
+	
+	public void setSkeletonConfig(String joint, float newLength, boolean updatePose) {
+		switch(joint) {
+		case "Head":
+			headShift = newLength;
+			headNode.localTransform.setTranslation(0, 0, headShift);
+			if(updatePose) {
+				headNode.update();
+			}
+			break;
+		case "Neck":
+			neckLength = newLength;
+			neckNode.localTransform.setTranslation(0, -neckLength, 0);
+			if(updatePose) {
+				neckNode.update();
+			}
+			break;
+		case "Waist":
+			waistDistance = newLength;
+			waistNode.localTransform.setTranslation(0, -(waistDistance - chestDistance), 0);
+			if(updatePose) {
+				waistNode.update();
+			}
+			break;
+		case "Chest":
+			chestDistance = newLength;
+			chestNode.localTransform.setTranslation(0, -chestDistance, 0);
+			waistNode.localTransform.setTranslation(0, -(waistDistance - chestDistance), 0);
+			if(updatePose) {
+				chestNode.update();
+			}
+			break;
+		case "Hips width":
+			hipsWidth = newLength;
+			leftHipNode.localTransform.setTranslation(-hipsWidth / 2, 0, 0);
+			rightHipNode.localTransform.setTranslation(hipsWidth / 2, 0, 0);
+			if(updatePose) {
+				leftHipNode.update();
+				rightHipNode.update();
+			}
+			break;
+		case "Knee height":
+			kneeHeight = newLength;
+			leftAnkleNode.localTransform.setTranslation(0, -kneeHeight, 0);
+			rightAnkleNode.localTransform.setTranslation(0, -kneeHeight, 0);
+			leftKneeNode.localTransform.setTranslation(0, -(legsLength - kneeHeight), 0);
+			rightKneeNode.localTransform.setTranslation(0, -(legsLength - kneeHeight), 0);
+			if(updatePose) {
+				leftKneeNode.update();
+				rightKneeNode.update();
+			}
+			break;
+		case "Legs length":
+			legsLength = newLength;
+			leftKneeNode.localTransform.setTranslation(0, -(legsLength - kneeHeight), 0);
+			rightKneeNode.localTransform.setTranslation(0, -(legsLength - kneeHeight), 0);
+			if(updatePose) {
+				leftKneeNode.update();
+				rightKneeNode.update();
+			}
+			break;
+		}
+	}
+	
+	public Float getSkeletonConfig(String joint) {
+		switch(joint) {
+		case "Head":
+			return headShift;
+		case "Neck":
+			return neckLength;
+		case "Waist":
+			return waistDistance;
+		case "Chest":
+			return chestDistance;
+		case "Hips width":
+			return hipsWidth;
+		case "Knee height":
+			return kneeHeight;
+		case "Legs length":
+			return legsLength;
+		}
+		
+		return null;
+	}
+	
+	public void updatePose() {
+		hmdNode.update();
+	}
+	
+	public TransformNode getNode(String node) {
+		return nodes.get(node);
+	}
+	
+	public TransformNode getNode(TrackerBodyPosition bodyPosition) {
+		return getNode(bodyPosition, false);
+	}
+	
+	public TransformNode getNode(TrackerBodyPosition bodyPosition, boolean rotationNode) {
+		if(bodyPosition == null) {
+			return null;
+		}
+		
+		switch(bodyPosition) {
+		case HMD:
+			return hmdNode;
+		case CHEST:
+			return rotationNode ? neckNode : chestNode;
+		case WAIST:
+			return rotationNode ? chestNode : waistNode;
+		
+		case LEFT_LEG:
+			return rotationNode ? leftHipNode : leftKneeNode;
+		case RIGHT_LEG:
+			return rotationNode ? rightHipNode : rightKneeNode;
+		
+		case LEFT_ANKLE:
+			return rotationNode ? leftKneeNode : leftAnkleNode;
+		case RIGHT_ANKLE:
+			return rotationNode ? rightKneeNode : rightAnkleNode;
+		}
+		
+		return null;
+	}
+	
+	public Vector3f getNodePosition(String node) {
+		TransformNode transformNode = getNode(node);
+		return transformNode != null ? transformNode.worldTransform.getTranslation() : null;
+	}
+	
+	public Vector3f getNodePosition(TrackerBodyPosition bodyPosition) {
+		TransformNode node = getNode(bodyPosition);
+		if(node == null) {
+			return null;
+		}
+		
+		return node.worldTransform.getTranslation();
+	}
+	
+	public void saveConfigs(YamlFile config) {
+		// Save waist configs
+		config.setProperty("body.headShift", headShift);
+		config.setProperty("body.neckLength", neckLength);
+		config.setProperty("body.waistDistance", waistDistance);
+		config.setProperty("body.chestDistance", chestDistance);
+		
+		// Save leg configs
+		config.setProperty("body.hipsWidth", hipsWidth);
+		config.setProperty("body.kneeHeight", kneeHeight);
+		config.setProperty("body.legsLength", legsLength);
+	}
+}

src/main/java/dev/slimevr/gui/AutoBoneWindow.java

@@ -0,0 +1,442 @@
+package dev.slimevr.gui;
+
+import javax.swing.BoxLayout;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JScrollPane;
+import javax.swing.ScrollPaneConstants;
+import javax.swing.JButton;
+import javax.swing.border.EmptyBorder;
+import java.awt.event.MouseEvent;
+import java.io.File;
+import java.util.List;
+import java.util.Map.Entry;
+import java.util.concurrent.Future;
+
+import io.eiren.gui.EJBox;
+import io.eiren.gui.SkeletonConfig;
+import io.eiren.util.StringUtils;
+import io.eiren.util.ann.AWTThread;
+import io.eiren.util.collections.FastList;
+import io.eiren.util.logging.LogManager;
+import io.eiren.vr.VRServer;
+
+import javax.swing.event.MouseInputAdapter;
+
+import org.apache.commons.lang3.tuple.Pair;
+
+import dev.slimevr.autobone.AutoBone;
+import dev.slimevr.poserecorder.PoseFrame;
+import dev.slimevr.poserecorder.PoseFrameIO;
+import dev.slimevr.poserecorder.PoseRecorder;
+
+public class AutoBoneWindow extends JFrame {
+	
+	private static File saveDir = new File("Recordings");
+	private static File loadDir = new File("LoadRecordings");
+	
+	private EJBox pane;
+	
+	private final transient VRServer server;
+	private final transient SkeletonConfig skeletonConfig;
+	private final transient PoseRecorder poseRecorder;
+	private final transient AutoBone autoBone;
+	
+	private transient Thread recordingThread = null;
+	private transient Thread saveRecordingThread = null;
+	private transient Thread autoBoneThread = null;
+	
+	private JButton saveRecordingButton;
+	private JButton adjustButton;
+	private JButton applyButton;
+	
+	private JLabel processLabel;
+	private JLabel lengthsLabel;
+	
+	public AutoBoneWindow(VRServer server, SkeletonConfig skeletonConfig) {
+		super("Skeleton Auto-Configuration");
+		
+		this.server = server;
+		this.skeletonConfig = skeletonConfig;
+		this.poseRecorder = new PoseRecorder(server);
+		this.autoBone = new AutoBone(server);
+		
+		getContentPane().setLayout(new BoxLayout(getContentPane(), BoxLayout.PAGE_AXIS));
+		add(new JScrollPane(pane = new EJBox(BoxLayout.PAGE_AXIS), ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED));
+		
+		build();
+	}
+	
+	private String getLengthsString() {
+		boolean first = true;
+		StringBuilder configInfo = new StringBuilder("");
+		for(Entry<String, Float> entry : autoBone.configs.entrySet()) {
+			if(!first) {
+				configInfo.append(", ");
+			} else {
+				first = false;
+			}
+			
+			configInfo.append(entry.getKey() + ": " + StringUtils.prettyNumber(entry.getValue() * 100f, 2));
+		}
+		
+		return configInfo.toString();
+	}
+	
+	private void saveRecording(PoseFrame frames) {
+		if(saveDir.isDirectory() || saveDir.mkdirs()) {
+			File saveRecording;
+			int recordingIndex = 1;
+			do {
+				saveRecording = new File(saveDir, "ABRecording" + recordingIndex++ + ".pfr");
+			} while(saveRecording.exists());
+			
+			LogManager.log.info("[AutoBone] Exporting frames to \"" + saveRecording.getPath() + "\"...");
+			if(PoseFrameIO.writeToFile(saveRecording, frames)) {
+				LogManager.log.info("[AutoBone] Done exporting! Recording can be found at \"" + saveRecording.getPath() + "\".");
+			} else {
+				LogManager.log.severe("[AutoBone] Failed to export the recording to \"" + saveRecording.getPath() + "\".");
+			}
+		} else {
+			LogManager.log.severe("[AutoBone] Failed to create the recording directory \"" + saveDir.getPath() + "\".");
+		}
+	}
+	
+	private List<Pair<String, PoseFrame>> loadRecordings() {
+		List<Pair<String, PoseFrame>> recordings = new FastList<Pair<String, PoseFrame>>();
+		if(loadDir.isDirectory()) {
+			File[] files = loadDir.listFiles();
+			if(files != null) {
+				for(File file : files) {
+					if(file.isFile() && org.apache.commons.lang3.StringUtils.endsWithIgnoreCase(file.getName(), ".pfr")) {
+						LogManager.log.info("[AutoBone] Detected recording at \"" + file.getPath() + "\", loading frames...");
+						PoseFrame frames = PoseFrameIO.readFromFile(file);
+						
+						if(frames == null) {
+							LogManager.log.severe("Reading frames from \"" + file.getPath() + "\" failed...");
+						} else {
+							recordings.add(Pair.of(file.getName(), frames));
+						}
+					}
+				}
+			}
+		}
+		
+		return recordings;
+	}
+	
+	private float processFrames(PoseFrame frames) {
+		autoBone.minDataDistance = server.config.getInt("autobone.minimumDataDistance", autoBone.minDataDistance);
+		autoBone.maxDataDistance = server.config.getInt("autobone.maximumDataDistance", autoBone.maxDataDistance);
+		
+		autoBone.numEpochs = server.config.getInt("autobone.epochCount", autoBone.numEpochs);
+		
+		autoBone.initialAdjustRate = server.config.getFloat("autobone.adjustRate", autoBone.initialAdjustRate);
+		autoBone.adjustRateDecay = server.config.getFloat("autobone.adjustRateDecay", autoBone.adjustRateDecay);
+		
+		autoBone.slideErrorFactor = server.config.getFloat("autobone.slideErrorFactor", autoBone.slideErrorFactor);
+		autoBone.offsetErrorFactor = server.config.getFloat("autobone.offsetErrorFactor", autoBone.offsetErrorFactor);
+		autoBone.proportionErrorFactor = server.config.getFloat("autobone.proportionErrorFactor", autoBone.proportionErrorFactor);
+		autoBone.heightErrorFactor = server.config.getFloat("autobone.heightErrorFactor", autoBone.heightErrorFactor);
+		autoBone.positionErrorFactor = server.config.getFloat("autobone.positionErrorFactor", autoBone.positionErrorFactor);
+		autoBone.positionOffsetErrorFactor = server.config.getFloat("autobone.positionOffsetErrorFactor", autoBone.positionOffsetErrorFactor);
+		
+		boolean calcInitError = server.config.getBoolean("autobone.calculateInitialError", true);
+		float targetHeight = server.config.getFloat("autobone.manualTargetHeight", -1f);
+		return autoBone.processFrames(frames, calcInitError, targetHeight, (epoch) -> {
+			processLabel.setText(epoch.toString());
+			lengthsLabel.setText(getLengthsString());
+		});
+	}
+	
+	@AWTThread
+	private void build() {
+		pane.add(new EJBox(BoxLayout.LINE_AXIS) {
+			{
+				setBorder(new EmptyBorder(i(5)));
+				add(new JButton("Start Recording") {
+					{
+						addMouseListener(new MouseInputAdapter() {
+							@Override
+							public void mouseClicked(MouseEvent e) {
+								// Prevent running multiple times
+								if(!isEnabled() || recordingThread != null) {
+									return;
+								}
+								
+								Thread thread = new Thread() {
+									@Override
+									public void run() {
+										try {
+											if(poseRecorder.isReadyToRecord()) {
+												setText("Recording...");
+												// 1000 samples at 20 ms per sample is 20 seconds
+												int sampleCount = server.config.getInt("autobone.sampleCount", 1000);
+												long sampleRate = server.config.getLong("autobone.sampleRateMs", 20L);
+												Future<PoseFrame> framesFuture = poseRecorder.startFrameRecording(sampleCount, sampleRate);
+												PoseFrame frames = framesFuture.get();
+												LogManager.log.info("[AutoBone] Done recording!");
+												
+												saveRecordingButton.setEnabled(true);
+												adjustButton.setEnabled(true);
+												
+												if(server.config.getBoolean("autobone.saveRecordings", false)) {
+													setText("Saving...");
+													saveRecording(frames);
+												}
+											} else {
+												setText("Not Ready...");
+												LogManager.log.severe("[AutoBone] Unable to record...");
+												Thread.sleep(3000); // Wait for 3 seconds
+												return;
+											}
+										} catch(Exception e) {
+											setText("Recording Failed...");
+											LogManager.log.severe("[AutoBone] Failed recording!", e);
+											try {
+												Thread.sleep(3000); // Wait for 3 seconds
+											} catch(Exception e1) {
+												// Ignore
+											}
+										} finally {
+											setText("Start Recording");
+											recordingThread = null;
+										}
+									}
+								};
+								
+								recordingThread = thread;
+								thread.start();
+							}
+						});
+					}
+				});
+				
+				add(saveRecordingButton = new JButton("Save Recording") {
+					{
+						setEnabled(poseRecorder.hasRecording());
+						addMouseListener(new MouseInputAdapter() {
+							@Override
+							public void mouseClicked(MouseEvent e) {
+								// Prevent running multiple times
+								if(!isEnabled() || saveRecordingThread != null) {
+									return;
+								}
+								
+								Thread thread = new Thread() {
+									@Override
+									public void run() {
+										try {
+											Future<PoseFrame> framesFuture = poseRecorder.getFramesAsync();
+											if(framesFuture != null) {
+												setText("Waiting for Recording...");
+												PoseFrame frames = framesFuture.get();
+												
+												if(frames.getTrackerCount() <= 0) {
+													throw new IllegalStateException("Recording has no trackers");
+												}
+												
+												if(frames.getMaxFrameCount() <= 0) {
+													throw new IllegalStateException("Recording has no frames");
+												}
+												
+												setText("Saving...");
+												saveRecording(frames);
+												
+												setText("Recording Saved!");
+												try {
+													Thread.sleep(3000); // Wait for 3 seconds
+												} catch(Exception e1) {
+													// Ignore
+												}
+											} else {
+												setText("No Recording...");
+												LogManager.log.severe("[AutoBone] Unable to save, no recording was done...");
+												try {
+													Thread.sleep(3000); // Wait for 3 seconds
+												} catch(Exception e1) {
+													// Ignore
+												}
+												return;
+											}
+										} catch(Exception e) {
+											setText("Saving Failed...");
+											LogManager.log.severe("[AutoBone] Failed to save recording!", e);
+											try {
+												Thread.sleep(3000); // Wait for 3 seconds
+											} catch(Exception e1) {
+												// Ignore
+											}
+										} finally {
+											setText("Save Recording");
+											saveRecordingThread = null;
+										}
+									}
+								};
+								
+								saveRecordingThread = thread;
+								thread.start();
+							}
+						});
+					}
+				});
+				
+				add(adjustButton = new JButton("Auto-Adjust") {
+					{
+						// If there are files to load, enable the button
+						setEnabled(poseRecorder.hasRecording() || (loadDir.isDirectory() && loadDir.list().length > 0));
+						addMouseListener(new MouseInputAdapter() {
+							@Override
+							public void mouseClicked(MouseEvent e) {
+								// Prevent running multiple times
+								if(!isEnabled() || autoBoneThread != null) {
+									return;
+								}
+								
+								Thread thread = new Thread() {
+									@Override
+									public void run() {
+										try {
+											setText("Load...");
+											List<Pair<String, PoseFrame>> frameRecordings = loadRecordings();
+											
+											if(!frameRecordings.isEmpty()) {
+												LogManager.log.info("[AutoBone] Done loading frames!");
+											} else {
+												Future<PoseFrame> framesFuture = poseRecorder.getFramesAsync();
+												if(framesFuture != null) {
+													setText("Waiting for Recording...");
+													PoseFrame frames = framesFuture.get();
+													
+													if(frames.getTrackerCount() <= 0) {
+														throw new IllegalStateException("Recording has no trackers");
+													}
+													
+													if(frames.getMaxFrameCount() <= 0) {
+														throw new IllegalStateException("Recording has no frames");
+													}
+													
+													frameRecordings.add(Pair.of("<Recording>", frames));
+												} else {
+													setText("No Recordings...");
+													LogManager.log.severe("[AutoBone] No recordings found in \"" + loadDir.getPath() + "\" and no recording was done...");
+													try {
+														Thread.sleep(3000); // Wait for 3 seconds
+													} catch(Exception e1) {
+														// Ignore
+													}
+													return;
+												}
+											}
+											
+											setText("Processing...");
+											LogManager.log.info("[AutoBone] Processing frames...");
+											FastList<Float> heightPercentError = new FastList<Float>(frameRecordings.size());
+											for(Pair<String, PoseFrame> recording : frameRecordings) {
+												LogManager.log.info("[AutoBone] Processing frames from \"" + recording.getKey() + "\"...");
+												
+												heightPercentError.add(processFrames(recording.getValue()));
+												LogManager.log.info("[AutoBone] Done processing!");
+												applyButton.setEnabled(true);
+												
+												//#region Stats/Values
+												Float neckLength = autoBone.getConfig("Neck");
+												Float chestLength = autoBone.getConfig("Chest");
+												Float waistLength = autoBone.getConfig("Waist");
+												Float hipWidth = autoBone.getConfig("Hips width");
+												Float legsLength = autoBone.getConfig("Legs length");
+												Float kneeHeight = autoBone.getConfig("Knee height");
+												
+												float neckWaist = neckLength != null && waistLength != null ? neckLength / waistLength : 0f;
+												float chestWaist = chestLength != null && waistLength != null ? chestLength / waistLength : 0f;
+												float hipWaist = hipWidth != null && waistLength != null ? hipWidth / waistLength : 0f;
+												float legWaist = legsLength != null && waistLength != null ? legsLength / waistLength : 0f;
+												float legBody = legsLength != null && waistLength != null && neckLength != null ? legsLength / (waistLength + neckLength) : 0f;
+												float kneeLeg = kneeHeight != null && legsLength != null ? kneeHeight / legsLength : 0f;
+												
+												LogManager.log.info("[AutoBone] Ratios: [{Neck-Waist: " + StringUtils.prettyNumber(neckWaist) + "}, {Chest-Waist: " + StringUtils.prettyNumber(chestWaist) + "}, {Hip-Waist: " + StringUtils.prettyNumber(hipWaist) + "}, {Leg-Waist: " + StringUtils.prettyNumber(legWaist) + "}, {Leg-Body: " + StringUtils.prettyNumber(legBody) + "}, {Knee-Leg: " + StringUtils.prettyNumber(kneeLeg) + "}]");
+												
+												String lengthsString = getLengthsString();
+												LogManager.log.info("[AutoBone] Length values: " + lengthsString);
+												lengthsLabel.setText(lengthsString);
+											}
+											
+											if(!heightPercentError.isEmpty()) {
+												float mean = 0f;
+												for(float val : heightPercentError) {
+													mean += val;
+												}
+												mean /= heightPercentError.size();
+												
+												float std = 0f;
+												for(float val : heightPercentError) {
+													float stdVal = val - mean;
+													std += stdVal * stdVal;
+												}
+												std = (float) Math.sqrt(std / heightPercentError.size());
+												
+												LogManager.log.info("[AutoBone] Average height error: " + StringUtils.prettyNumber(mean, 6) + " (SD " + StringUtils.prettyNumber(std, 6) + ")");
+											}
+											//#endregion
+										} catch(Exception e) {
+											setText("Failed...");
+											LogManager.log.severe("[AutoBone] Failed adjustment!", e);
+											try {
+												Thread.sleep(3000); // Wait for 3 seconds
+											} catch(Exception e1) {
+												// Ignore
+											}
+										} finally {
+											setText("Auto-Adjust");
+											autoBoneThread = null;
+										}
+									}
+								};
+								
+								autoBoneThread = thread;
+								thread.start();
+							}
+						});
+					}
+				});
+				
+				add(applyButton = new JButton("Apply Values") {
+					{
+						setEnabled(false);
+						addMouseListener(new MouseInputAdapter() {
+							@Override
+							public void mouseClicked(MouseEvent e) {
+								if(!isEnabled()) {
+									return;
+								}
+								
+								autoBone.applyConfig();
+								// Update GUI values after applying
+								skeletonConfig.refreshAll();
+							}
+						});
+					}
+				});
+			}
+		});
+		
+		pane.add(new EJBox(BoxLayout.LINE_AXIS) {
+			{
+				setBorder(new EmptyBorder(i(5)));
+				add(processLabel = new JLabel("Processing has not been started..."));
+			}
+		});
+		
+		pane.add(new EJBox(BoxLayout.LINE_AXIS) {
+			{
+				setBorder(new EmptyBorder(i(5)));
+				add(lengthsLabel = new JLabel(getLengthsString()));
+			}
+		});
+		
+		// Pack and display
+		pack();
+		setLocationRelativeTo(null);
+		setVisible(false);
+	}
+}

src/main/java/dev/slimevr/poserecorder/PoseFrame.java

@@ -0,0 +1,143 @@
+package dev.slimevr.poserecorder;
+
+import java.util.Iterator;
+import java.util.List;
+import java.util.NoSuchElementException;
+
+import io.eiren.util.collections.FastList;
+import io.eiren.vr.trackers.Tracker;
+
+public final class PoseFrame implements Iterable<TrackerFrame[]> {
+	
+	private final FastList<PoseFrameTracker> trackers;
+	
+	public PoseFrame(FastList<PoseFrameTracker> trackers) {
+		this.trackers = trackers;
+	}
+	
+	public PoseFrame(int initialCapacity) {
+		this.trackers = new FastList<PoseFrameTracker>(initialCapacity);
+	}
+	
+	public PoseFrame() {
+		this(5);
+	}
+	
+	public PoseFrameTracker addTracker(PoseFrameTracker tracker) {
+		trackers.add(tracker);
+		return tracker;
+	}
+	
+	public PoseFrameTracker addTracker(Tracker tracker, int initialCapacity) {
+		return addTracker(new PoseFrameTracker(tracker.getName(), initialCapacity));
+	}
+	
+	public PoseFrameTracker addTracker(Tracker tracker) {
+		return addTracker(tracker, 5);
+	}
+	
+	public PoseFrameTracker removeTracker(int index) {
+		return trackers.remove(index);
+	}
+	
+	public PoseFrameTracker removeTracker(PoseFrameTracker tracker) {
+		trackers.remove(tracker);
+		return tracker;
+	}
+	
+	public void clearTrackers() {
+		trackers.clear();
+	}
+	
+	public void fakeClearTrackers() {
+		trackers.fakeClear();
+	}
+	
+	public int getTrackerCount() {
+		return trackers.size();
+	}
+	
+	public List<PoseFrameTracker> getTrackers() {
+		return trackers;
+	}
+	
+	public int getMaxFrameCount() {
+		int maxFrames = 0;
+		
+		for(int i = 0; i < trackers.size(); i++) {
+			PoseFrameTracker tracker = trackers.get(i);
+			if(tracker != null && tracker.getFrameCount() > maxFrames) {
+				maxFrames = tracker.getFrameCount();
+			}
+		}
+		
+		return maxFrames;
+	}
+	
+	public int getFrames(int frameIndex, TrackerFrame[] buffer) {
+		for(int i = 0; i < trackers.size(); i++) {
+			PoseFrameTracker tracker = trackers.get(i);
+			buffer[i] = tracker != null ? tracker.safeGetFrame(frameIndex) : null;
+		}
+		return trackers.size();
+	}
+	
+	public int getFrames(int frameIndex, List<TrackerFrame> buffer) {
+		for(int i = 0; i < trackers.size(); i++) {
+			PoseFrameTracker tracker = trackers.get(i);
+			buffer.add(i, tracker != null ? tracker.safeGetFrame(frameIndex) : null);
+		}
+		return trackers.size();
+	}
+	
+	public TrackerFrame[] getFrames(int frameIndex) {
+		TrackerFrame[] trackerFrames = new TrackerFrame[trackers.size()];
+		getFrames(frameIndex, trackerFrames);
+		return trackerFrames;
+	}
+	
+	@Override
+	public Iterator<TrackerFrame[]> iterator() {
+		return new PoseFrameIterator(this);
+	}
+	
+	public class PoseFrameIterator implements Iterator<TrackerFrame[]> {
+		
+		private final PoseFrame poseFrame;
+		private final TrackerFrame[] trackerFrameBuffer;
+		
+		private int cursor = 0;
+		
+		public PoseFrameIterator(PoseFrame poseFrame) {
+			this.poseFrame = poseFrame;
+			trackerFrameBuffer = new TrackerFrame[poseFrame.getTrackerCount()];
+		}
+		
+		@Override
+		public boolean hasNext() {
+			if(trackers.isEmpty()) {
+				return false;
+			}
+			
+			for(int i = 0; i < trackers.size(); i++) {
+				PoseFrameTracker tracker = trackers.get(i);
+				if(tracker != null && cursor < tracker.getFrameCount()) {
+					return true;
+				}
+			}
+			
+			return false;
+		}
+		
+		@Override
+		public TrackerFrame[] next() {
+			if(!hasNext()) {
+				throw new NoSuchElementException();
+			}
+			
+			poseFrame.getFrames(cursor++, trackerFrameBuffer);
+			
+			return trackerFrameBuffer;
+		}
+	}
+}

src/main/java/dev/slimevr/poserecorder/PoseFrameIO.java

@@ -0,0 +1,139 @@
+package dev.slimevr.poserecorder;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+
+import com.jme3.math.Quaternion;
+import com.jme3.math.Vector3f;
+
+import io.eiren.util.collections.FastList;
+import io.eiren.util.logging.LogManager;
+import io.eiren.vr.processor.TrackerBodyPosition;
+
+public final class PoseFrameIO {
+	
+	private PoseFrameIO() {
+		// Do not allow instantiating
+	}
+	
+	public static boolean writeFrames(DataOutputStream outputStream, PoseFrame frames) {
+		try {
+			if(frames != null) {
+				outputStream.writeInt(frames.getTrackerCount());
+				for(PoseFrameTracker tracker : frames.getTrackers()) {
+					
+					outputStream.writeUTF(tracker.name);
+					outputStream.writeInt(tracker.getFrameCount());
+					for(int i = 0; i < tracker.getFrameCount(); i++) {
+						TrackerFrame trackerFrame = tracker.safeGetFrame(i);
+						if(trackerFrame == null) {
+							outputStream.writeInt(0);
+							continue;
+						}
+						
+						outputStream.writeInt(trackerFrame.getDataFlags());
+						
+						if(trackerFrame.hasData(TrackerFrameData.DESIGNATION)) {
+							outputStream.writeUTF(trackerFrame.designation.designation);
+						}
+						
+						if(trackerFrame.hasData(TrackerFrameData.ROTATION)) {
+							outputStream.writeFloat(trackerFrame.rotation.getX());
+							outputStream.writeFloat(trackerFrame.rotation.getY());
+							outputStream.writeFloat(trackerFrame.rotation.getZ());
+							outputStream.writeFloat(trackerFrame.rotation.getW());
+						}
+						
+						if(trackerFrame.hasData(TrackerFrameData.POSITION)) {
+							outputStream.writeFloat(trackerFrame.position.getX());
+							outputStream.writeFloat(trackerFrame.position.getY());
+							outputStream.writeFloat(trackerFrame.position.getZ());
+						}
+					}
+				}
+			} else {
+				outputStream.writeInt(0);
+			}
+		} catch(Exception e) {
+			LogManager.log.severe("Error writing frame to stream", e);
+			return false;
+		}
+		
+		return true;
+	}
+	
+	public static boolean writeToFile(File file, PoseFrame frames) {
+		try(DataOutputStream outputStream = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(file)))) {
+			writeFrames(outputStream, frames);
+		} catch(Exception e) {
+			LogManager.log.severe("Error writing frames to file", e);
+			return false;
+		}
+		
+		return true;
+	}
+	
+	public static PoseFrame readFrames(DataInputStream inputStream) {
+		try {
+			
+			int trackerCount = inputStream.readInt();
+			FastList<PoseFrameTracker> trackers = new FastList<PoseFrameTracker>(trackerCount);
+			for(int i = 0; i < trackerCount; i++) {
+				
+				String name = inputStream.readUTF();
+				int trackerFrameCount = inputStream.readInt();
+				FastList<TrackerFrame> trackerFrames = new FastList<TrackerFrame>(trackerFrameCount);
+				for(int j = 0; j < trackerFrameCount; j++) {
+					int dataFlags = inputStream.readInt();
+					
+					TrackerBodyPosition designation = null;
+					if(TrackerFrameData.DESIGNATION.check(dataFlags)) {
+						designation = TrackerBodyPosition.getByDesignation(inputStream.readUTF());
+					}
+					
+					Quaternion rotation = null;
+					if(TrackerFrameData.ROTATION.check(dataFlags)) {
+						float quatX = inputStream.readFloat();
+						float quatY = inputStream.readFloat();
+						float quatZ = inputStream.readFloat();
+						float quatW = inputStream.readFloat();
+						rotation = new Quaternion(quatX, quatY, quatZ, quatW);
+					}
+					
+					Vector3f position = null;
+					if(TrackerFrameData.POSITION.check(dataFlags)) {
+						float posX = inputStream.readFloat();
+						float posY = inputStream.readFloat();
+						float posZ = inputStream.readFloat();
+						position = new Vector3f(posX, posY, posZ);
+					}
+					
+					trackerFrames.add(new TrackerFrame(designation, rotation, position));
+				}
+				
+				trackers.add(new PoseFrameTracker(name, trackerFrames));
+			}
+			
+			return new PoseFrame(trackers);
+		} catch(Exception e) {
+			LogManager.log.severe("Error reading frame from stream", e);
+		}
+		
+		return null;
+	}
+	
+	public static PoseFrame readFromFile(File file) {
+		try {
+			return readFrames(new DataInputStream(new BufferedInputStream(new FileInputStream(file))));
+		} catch(Exception e) {
+			LogManager.log.severe("Error reading frame from file", e);
+		}
+		
+		return null;
+	}
+}

src/main/java/dev/slimevr/poserecorder/PoseFrameTracker.java

@@ -0,0 +1,233 @@
+package dev.slimevr.poserecorder;
+
+import java.util.Iterator;
+
+import com.jme3.math.Quaternion;
+import com.jme3.math.Vector3f;
+
+import io.eiren.util.collections.FastList;
+import io.eiren.vr.processor.TrackerBodyPosition;
+import io.eiren.vr.trackers.Tracker;
+import io.eiren.vr.trackers.TrackerConfig;
+import io.eiren.vr.trackers.TrackerStatus;
+
+public class PoseFrameTracker implements Tracker, Iterable<TrackerFrame> {
+	
+	public final String name;
+	
+	private final FastList<TrackerFrame> frames;
+	private int frameCursor = 0;
+	
+	public PoseFrameTracker(String name, FastList<TrackerFrame> frames) {
+		if(frames == null) {
+			throw new NullPointerException("frames must not be null");
+		}
+		
+		this.name = name != null ? name : "";
+		this.frames = frames;
+	}
+	
+	public PoseFrameTracker(String name, int initialCapacity) {
+		this(name, new FastList<TrackerFrame>(initialCapacity));
+	}
+	
+	public PoseFrameTracker(String name) {
+		this(name, 5);
+	}
+	
+	private int limitCursor() {
+		if(frameCursor < 0 || frames.isEmpty()) {
+			frameCursor = 0;
+		} else if(frameCursor >= frames.size()) {
+			frameCursor = frames.size() - 1;
+		}
+		
+		return frameCursor;
+	}
+	
+	public int setCursor(int index) {
+		frameCursor = index;
+		return limitCursor();
+	}
+	
+	public int incrementCursor(int increment) {
+		frameCursor += increment;
+		return limitCursor();
+	}
+	
+	public int incrementCursor() {
+		return incrementCursor(1);
+	}
+	
+	public int getCursor() {
+		return frameCursor;
+	}
+	
+	public int getFrameCount() {
+		return frames.size();
+	}
+	
+	public TrackerFrame addFrame(int index, TrackerFrame trackerFrame) {
+		frames.add(index, trackerFrame);
+		return trackerFrame;
+	}
+	
+	public TrackerFrame addFrame(int index, Tracker tracker) {
+		return addFrame(index, TrackerFrame.fromTracker(tracker));
+	}
+	
+	public TrackerFrame addFrame(TrackerFrame trackerFrame) {
+		frames.add(trackerFrame);
+		return trackerFrame;
+	}
+	
+	public TrackerFrame addFrame(Tracker tracker) {
+		return addFrame(TrackerFrame.fromTracker(tracker));
+	}
+	
+	public TrackerFrame removeFrame(int index) {
+		TrackerFrame trackerFrame = frames.remove(index);
+		limitCursor();
+		return trackerFrame;
+	}
+	
+	public TrackerFrame removeFrame(TrackerFrame trackerFrame) {
+		frames.remove(trackerFrame);
+		limitCursor();
+		return trackerFrame;
+	}
+	
+	public void clearFrames() {
+		frames.clear();
+		limitCursor();
+	}
+	
+	public void fakeClearFrames() {
+		frames.fakeClear();
+		limitCursor();
+	}
+	
+	public TrackerFrame getFrame(int index) {
+		return frames.get(index);
+	}
+	
+	public TrackerFrame getFrame() {
+		return getFrame(frameCursor);
+	}
+	
+	public TrackerFrame safeGetFrame(int index) {
+		try {
+			return getFrame(index);
+		} catch(Exception e) {
+			return null;
+		}
+	}
+	
+	public TrackerFrame safeGetFrame() {
+		return safeGetFrame(frameCursor);
+	}
+	
+	//#region Tracker Interface Implementation
+	@Override
+	public boolean getRotation(Quaternion store) {
+		TrackerFrame frame = safeGetFrame();
+		if(frame != null && frame.hasData(TrackerFrameData.ROTATION)) {
+			store.set(frame.rotation);
+			return true;
+		}
+		
+		store.set(0, 0, 0, 1);
+		return false;
+	}
+	
+	@Override
+	public boolean getPosition(Vector3f store) {
+		TrackerFrame frame = safeGetFrame();
+		if(frame != null && frame.hasData(TrackerFrameData.POSITION)) {
+			store.set(frame.position);
+			return true;
+		}
+		
+		store.set(0, 0, 0);
+		return false;
+	}
+	
+	@Override
+	public String getName() {
+		return name;
+	}
+	
+	@Override
+	public TrackerStatus getStatus() {
+		return TrackerStatus.OK;
+	}
+	
+	@Override
+	public void loadConfig(TrackerConfig config) {
+		throw new UnsupportedOperationException("PoseFrameTracker does not implement configuration");
+	}
+	
+	@Override
+	public void saveConfig(TrackerConfig config) {
+		throw new UnsupportedOperationException("PoseFrameTracker does not implement configuration");
+	}
+	
+	@Override
+	public float getConfidenceLevel() {
+		return 0;
+	}
+	
+	@Override
+	public void resetFull(Quaternion reference) {
+		throw new UnsupportedOperationException("PoseFrameTracker does not implement calibration");
+	}
+	
+	@Override
+	public void resetYaw(Quaternion reference) {
+		throw new UnsupportedOperationException("PoseFrameTracker does not implement calibration");
+	}
+	
+	@Override
+	public void tick() {
+		throw new UnsupportedOperationException("PoseFrameTracker does not implement this method");
+	}
+	
+	@Override
+	public TrackerBodyPosition getBodyPosition() {
+		TrackerFrame frame = safeGetFrame();
+		return frame == null ? null : frame.designation;
+	}
+	
+	@Override
+	public void setBodyPosition(TrackerBodyPosition position) {
+		throw new UnsupportedOperationException("PoseFrameTracker does not allow setting the body position");
+	}
+	
+	@Override
+	public boolean userEditable() {
+		return false;
+	}
+	
+	@Override
+	public boolean hasRotation() {
+		TrackerFrame frame = safeGetFrame();
+		return frame != null && frame.hasData(TrackerFrameData.ROTATION);
+	}
+	
+	@Override
+	public boolean hasPosition() {
+		TrackerFrame frame = safeGetFrame();
+		return frame != null && frame.hasData(TrackerFrameData.POSITION);
+	}
+	
+	@Override
+	public boolean isComputed() {
+		return true;
+	}
+	//#endregion
+	
+	@Override
+	public Iterator<TrackerFrame> iterator() {
+		return frames.iterator();
+	}
+}

src/main/java/dev/slimevr/poserecorder/PoseRecorder.java

@@ -0,0 +1,163 @@
+package dev.slimevr.poserecorder;
+
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+import org.apache.commons.lang3.tuple.Pair;
+
+import io.eiren.util.ann.VRServerThread;
+import io.eiren.util.collections.FastList;
+import io.eiren.util.logging.LogManager;
+import io.eiren.vr.VRServer;
+import io.eiren.vr.trackers.Tracker;
+
+public class PoseRecorder {
+	
+	protected PoseFrame poseFrame = null;
+	
+	protected int numFrames = -1;
+	protected int frameCursor = 0;
+	protected long frameRecordingInterval = 60L;
+	protected long nextFrameTimeMs = -1L;
+	
+	protected CompletableFuture<PoseFrame> currentRecording;
+	
+	protected final VRServer server;
+	FastList<Pair<Tracker, PoseFrameTracker>> trackers = new FastList<Pair<Tracker, PoseFrameTracker>>();
+	
+	public PoseRecorder(VRServer server) {
+		this.server = server;
+		server.addOnTick(this::onTick);
+	}
+	
+	@VRServerThread
+	public void onTick() {
+		if(numFrames > 0) {
+			PoseFrame poseFrame = this.poseFrame;
+			List<Pair<Tracker, PoseFrameTracker>> trackers = this.trackers;
+			if(poseFrame != null && trackers != null) {
+				if(frameCursor < numFrames) {
+					if(System.currentTimeMillis() >= nextFrameTimeMs) {
+						nextFrameTimeMs = System.currentTimeMillis() + frameRecordingInterval;
+						
+						int cursor = frameCursor++;
+						for(Pair<Tracker, PoseFrameTracker> tracker : trackers) {
+							// Add a frame for each tracker
+							tracker.getRight().addFrame(cursor, tracker.getLeft());
+						}
+						
+						// If done, send finished recording
+						if(frameCursor >= numFrames) {
+							internalStopRecording();
+						}
+					}
+				} else {
+					// If done and hasn't yet, send finished recording
+					internalStopRecording();
+				}
+			}
+		}
+	}
+	
+	public synchronized Future<PoseFrame> startFrameRecording(int numFrames, long interval) {
+		return startFrameRecording(numFrames, interval, server.getAllTrackers());
+	}
+	
+	public synchronized Future<PoseFrame> startFrameRecording(int numFrames, long interval, List<Tracker> trackers) {
+		if(numFrames < 1) {
+			throw new IllegalArgumentException("numFrames must at least have a value of 1");
+		}
+		if(interval < 1) {
+			throw new IllegalArgumentException("interval must at least have a value of 1");
+		}
+		if(trackers == null) {
+			throw new IllegalArgumentException("trackers must not be null");
+		}
+		if(trackers.isEmpty()) {
+			throw new IllegalArgumentException("trackers must have at least one entry");
+		}
+		if(!isReadyToRecord()) {
+			throw new IllegalStateException("PoseRecorder isn't ready to record!");
+		}
+		
+		cancelFrameRecording();
+		
+		poseFrame = new PoseFrame(trackers.size());
+		
+		// Update tracker list
+		this.trackers.ensureCapacity(trackers.size());
+		for(Tracker tracker : trackers) {
+			// Ignore null and computed trackers
+			if(tracker == null || tracker.isComputed()) {
+				continue;
+			}
+			
+			// Pair tracker with recording
+			this.trackers.add(Pair.of(tracker, poseFrame.addTracker(tracker, numFrames)));
+		}
+		
+		this.frameCursor = 0;
+		this.numFrames = numFrames;
+		
+		frameRecordingInterval = interval;
+		nextFrameTimeMs = -1L;
+		
+		LogManager.log.info("[PoseRecorder] Recording " + numFrames + " samples at a " + interval + " ms frame interval");
+		
+		currentRecording = new CompletableFuture<PoseFrame>();
+		return currentRecording;
+	}
+	
+	private void internalStopRecording() {
+		CompletableFuture<PoseFrame> currentRecording = this.currentRecording;
+		if(currentRecording != null && !currentRecording.isDone()) {
+			// Stop the recording, returning the frames recorded
+			currentRecording.complete(poseFrame);
+		}
+		
+		numFrames = -1;
+		frameCursor = 0;
+		trackers.clear();
+		poseFrame = null;
+	}
+	
+	public synchronized void stopFrameRecording() {
+		internalStopRecording();
+	}
+	
+	public synchronized void cancelFrameRecording() {
+		CompletableFuture<PoseFrame> currentRecording = this.currentRecording;
+		if(currentRecording != null && !currentRecording.isDone()) {
+			// Cancel the current recording and return nothing
+			currentRecording.cancel(true);
+		}
+		
+		numFrames = -1;
+		frameCursor = 0;
+		trackers.clear();
+		poseFrame = null;
+	}
+	
+	public boolean isReadyToRecord() {
+		return server.getTrackersCount() > 0;
+	}
+	
+	public boolean isRecording() {
+		return numFrames > frameCursor;
+	}
+	
+	public boolean hasRecording() {
+		return currentRecording != null;
+	}
+	
+	public Future<PoseFrame> getFramesAsync() {
+		return currentRecording;
+	}
+	
+	public PoseFrame getFrames() throws ExecutionException, InterruptedException {
+		CompletableFuture<PoseFrame> currentRecording = this.currentRecording;
+		return currentRecording != null ? currentRecording.get() : null;
+	}
+}

src/main/java/dev/slimevr/poserecorder/TrackerFrame.java

@@ -0,0 +1,173 @@
+package dev.slimevr.poserecorder;
+
+import com.jme3.math.Quaternion;
+import com.jme3.math.Vector3f;
+
+import io.eiren.vr.processor.TrackerBodyPosition;
+import io.eiren.vr.trackers.Tracker;
+import io.eiren.vr.trackers.TrackerConfig;
+import io.eiren.vr.trackers.TrackerStatus;
+
+public final class TrackerFrame implements Tracker {
+	
+	private int dataFlags = 0;
+	
+	public final TrackerBodyPosition designation;
+	public final Quaternion rotation;
+	public final Vector3f position;
+	
+	public TrackerFrame(TrackerBodyPosition designation, Quaternion rotation, Vector3f position) {
+		this.designation = designation;
+		if(designation != null) {
+			dataFlags |= TrackerFrameData.DESIGNATION.flag;
+		}
+		
+		this.rotation = rotation;
+		if(rotation != null) {
+			dataFlags |= TrackerFrameData.ROTATION.flag;
+		}
+		
+		this.position = position;
+		if(position != null) {
+			dataFlags |= TrackerFrameData.POSITION.flag;
+		}
+	}
+	
+	public static TrackerFrame fromTracker(Tracker tracker) {
+		if(tracker == null) {
+			return null;
+		}
+		
+		// If the tracker is not ready
+		if(tracker.getStatus() != TrackerStatus.OK && tracker.getStatus() != TrackerStatus.BUSY && tracker.getStatus() != TrackerStatus.OCCLUDED) {
+			return null;
+		}
+		
+		// If tracker has no data
+		if(tracker.getBodyPosition() == null && !tracker.hasRotation() && !tracker.hasPosition()) {
+			return null;
+		}
+		
+		Quaternion rotation = null;
+		if(tracker.hasRotation()) {
+			rotation = new Quaternion();
+			if(!tracker.getRotation(rotation)) {
+				// If getting the rotation failed, set it back to null
+				rotation = null;
+			}
+		}
+		
+		Vector3f position = null;
+		if(tracker.hasPosition()) {
+			position = new Vector3f();
+			if(!tracker.getPosition(position)) {
+				// If getting the position failed, set it back to null
+				position = null;
+			}
+		}
+		
+		return new TrackerFrame(tracker.getBodyPosition(), rotation, position);
+	}
+	
+	public int getDataFlags() {
+		return dataFlags;
+	}
+	
+	public boolean hasData(TrackerFrameData flag) {
+		return flag.check(dataFlags);
+	}
+	
+	//#region Tracker Interface Implementation
+	@Override
+	public boolean getRotation(Quaternion store) {
+		if(hasData(TrackerFrameData.ROTATION)) {
+			store.set(rotation);
+			return true;
+		}
+		
+		store.set(0, 0, 0, 1);
+		return false;
+	}
+	
+	@Override
+	public boolean getPosition(Vector3f store) {
+		if(hasData(TrackerFrameData.POSITION)) {
+			store.set(position);
+			return true;
+		}
+		
+		store.set(0, 0, 0);
+		return false;
+	}
+	
+	@Override
+	public String getName() {
+		return "TrackerFrame:/" + (designation != null ? designation.designation : "null");
+	}
+	
+	@Override
+	public TrackerStatus getStatus() {
+		return TrackerStatus.OK;
+	}
+	
+	@Override
+	public void loadConfig(TrackerConfig config) {
+		throw new UnsupportedOperationException("TrackerFrame does not implement configuration");
+	}
+	
+	@Override
+	public void saveConfig(TrackerConfig config) {
+		throw new UnsupportedOperationException("TrackerFrame does not implement configuration");
+	}
+	
+	@Override
+	public float getConfidenceLevel() {
+		return 0;
+	}
+	
+	@Override
+	public void resetFull(Quaternion reference) {
+		throw new UnsupportedOperationException("TrackerFrame does not implement calibration");
+	}
+	
+	@Override
+	public void resetYaw(Quaternion reference) {
+		throw new UnsupportedOperationException("TrackerFrame does not implement calibration");
+	}
+	
+	@Override
+	public void tick() {
+		throw new UnsupportedOperationException("TrackerFrame does not implement this method");
+	}
+	
+	@Override
+	public TrackerBodyPosition getBodyPosition() {
+		return designation;
+	}
+	
+	@Override
+	public void setBodyPosition(TrackerBodyPosition position) {
+		throw new UnsupportedOperationException("TrackerFrame does not allow setting the body position");
+	}
+	
+	@Override
+	public boolean userEditable() {
+		return false;
+	}
+	
+	@Override
+	public boolean hasRotation() {
+		return hasData(TrackerFrameData.ROTATION);
+	}
+	
+	@Override
+	public boolean hasPosition() {
+		return hasData(TrackerFrameData.POSITION);
+	}
+	
+	@Override
+	public boolean isComputed() {
+		return true;
+	}
+	//#endregion
+}

src/main/java/dev/slimevr/poserecorder/TrackerFrameData.java

@@ -0,0 +1,19 @@
+package dev.slimevr.poserecorder;
+
+public enum TrackerFrameData {
+	
+	DESIGNATION(0),
+	ROTATION(1),
+	POSITION(2),
+	;
+	
+	public final int flag;
+	
+	TrackerFrameData(int id) {
+		this.flag = 1 << id;
+	}
+	
+	public boolean check(int dataFlags) {
+		return (dataFlags & this.flag) != 0;
+	}
+}

src/main/java/io/eiren/gui/AbstractComponentListener.java

@@ -0,0 +1,24 @@
+package io.eiren.gui;
+
+import java.awt.event.ComponentEvent;
+import java.awt.event.ComponentListener;
+
+public abstract class AbstractComponentListener implements ComponentListener {
+	
+	@Override
+	public void componentResized(ComponentEvent e) {
+	}
+	
+	@Override
+	public void componentMoved(ComponentEvent e) {
+	}
+	
+	@Override
+	public void componentShown(ComponentEvent e) {
+	}
+	
+	@Override
+	public void componentHidden(ComponentEvent e) {
+	}
+	
+}

src/main/java/io/eiren/gui/AbstractWindowListener.java

@@ -0,0 +1,35 @@
+package io.eiren.gui;
+
+import java.awt.event.WindowEvent;
+import java.awt.event.WindowListener;
+
+public abstract class AbstractWindowListener implements WindowListener {
+	
+	@Override
+	public void windowOpened(WindowEvent e) {
+	}
+	
+	@Override
+	public void windowClosing(WindowEvent e) {
+	}
+	
+	@Override
+	public void windowClosed(WindowEvent e) {
+	}
+	
+	@Override
+	public void windowIconified(WindowEvent e) {
+	}
+	
+	@Override
+	public void windowDeiconified(WindowEvent e) {
+	}
+	
+	@Override
+	public void windowActivated(WindowEvent e) {
+	}
+	
+	@Override
+	public void windowDeactivated(WindowEvent e) {
+	}
+}

src/main/java/io/eiren/gui/SkeletonConfig.java

@@ -1,45 +1,45 @@
 package io.eiren.gui;
 
-import java.awt.event.ItemEvent;
-import java.awt.event.ItemListener;
 import java.awt.event.MouseEvent;
 import java.util.HashMap;
 import java.util.Map;
 
 import javax.swing.JButton;
-import javax.swing.JCheckBox;
 import javax.swing.JLabel;
 import javax.swing.event.MouseInputAdapter;
 
+import dev.slimevr.gui.AutoBoneWindow;
 import io.eiren.util.StringUtils;
 import io.eiren.util.ann.ThreadSafe;
 import io.eiren.vr.VRServer;
-import io.eiren.vr.processor.HumanSkeletonWithLegs;
 import io.eiren.vr.processor.HumanSkeleton;
 
 public class SkeletonConfig extends EJBag {
-	
+
 	private final VRServer server;
 	private final VRServerGUI gui;
+	private final AutoBoneWindow autoBone;
 	private Map<String, SkeletonLabel> labels = new HashMap<>();
-	
+
 	public SkeletonConfig(VRServer server, VRServerGUI gui) {
 		super();
 		this.server = server;
 		this.gui = gui;
+		this.autoBone = new AutoBoneWindow(server, this);
 
 		setAlignmentY(TOP_ALIGNMENT);
 		server.humanPoseProcessor.addSkeletonUpdatedCallback(this::skeletonUpdated);
 		skeletonUpdated(null);
 	}
-	
+
 	@ThreadSafe
 	public void skeletonUpdated(HumanSkeleton newSkeleton) {
 		java.awt.EventQueue.invokeLater(() -> {
 			removeAll();
-			
+
 			int row = 0;
 
+			/**
 			add(new JCheckBox("Extended pelvis model") {{
 				addItemListener(new ItemListener() {
 				    @Override
@@ -63,7 +63,7 @@ public class SkeletonConfig extends EJBag {
 				}
 			}}, s(c(0, row, 1), 3, 1));
 			row++;
-			
+			//*/
 			/*
 			add(new JCheckBox("Extended knee model") {{
 				addItemListener(new ItemListener() {
@@ -89,17 +89,26 @@ public class SkeletonConfig extends EJBag {
 			}}, s(c(0, row, 1), 3, 1));
 			row++;
 			//*/
-			
+
 			add(new TimedResetButton("Reset All", "All"), s(c(1, row, 1), 3, 1));
+			add(new JButton("Auto") {{
+				addMouseListener(new MouseInputAdapter() {
+					@Override
+					public void mouseClicked(MouseEvent e) {
+						autoBone.setVisible(true);
+						autoBone.toFront();
+					}
+				});
+			}}, s(c(4, row, 1), 3, 1));
 			row++;
-			
+
 			add(new JLabel("Chest"), c(0, row, 1));
 			add(new AdjButton("+", "Chest", 0.01f), c(1, row, 1));
 			add(new SkeletonLabel("Chest"), c(2, row, 1));
 			add(new AdjButton("-", "Chest", -0.01f), c(3, row, 1));
 			add(new ResetButton("Reset", "Chest"), c(4, row, 1));
 			row++;
-			
+
 			add(new JLabel("Waist"), c(0, row, 1));
 			add(new AdjButton("+", "Waist", 0.01f), c(1, row, 1));
 			add(new SkeletonLabel("Waist"), c(2, row, 1));
@@ -148,25 +157,34 @@ public class SkeletonConfig extends EJBag {
 			add(new AdjButton("-", "Neck", -0.01f), c(3, row, 1));
 			add(new ResetButton("Reset", "Neck"), c(4, row, 1));
 			row++;
-			
+
 			add(new JLabel("Virtual waist"), c(0, row, 1));
 			add(new AdjButton("+", "Virtual waist", 0.01f), c(1, row, 1));
 			add(new SkeletonLabel("Virtual waist"), c(2, row, 1));
 			add(new AdjButton("-", "Virtual waist", -0.01f), c(3, row, 1));
 			add(new ResetButton("Reset", "Virtual waist"), c(4, row, 1));
 			row++;
-			
+
 			gui.refresh();
 		});
 	}
-	
+
+	@ThreadSafe
+	public void refreshAll() {
+		java.awt.EventQueue.invokeLater(() -> {
+			labels.forEach((joint, label) -> {
+				label.setText(StringUtils.prettyNumber(server.humanPoseProcessor.getSkeletonConfig(joint) * 100, 0));
+			});
+		});
+	}
+
 	private void change(String joint, float diff) {
 		float current = server.humanPoseProcessor.getSkeletonConfig(joint);
 		server.humanPoseProcessor.setSkeletonConfig(joint, current + diff);
 		server.saveConfig();
 		labels.get(joint).setText(StringUtils.prettyNumber((current + diff) * 100, 0));
 	}
-	
+
 	private void reset(String joint) {
 		server.humanPoseProcessor.resetSkeletonConfig(joint);
 		server.saveConfig();
@@ -180,17 +198,17 @@ public class SkeletonConfig extends EJBag {
 			});
 		}
 	}
-	
+
 	private class SkeletonLabel extends JLabel {
-		
+
 		public SkeletonLabel(String joint) {
 			super(StringUtils.prettyNumber(server.humanPoseProcessor.getSkeletonConfig(joint) * 100, 0));
 			labels.put(joint, this);
 		}
 	}
-	
+
 	private class AdjButton extends JButton {
-		
+
 		public AdjButton(String text, String joint, float diff) {
 			super(text);
 			addMouseListener(new MouseInputAdapter() {
@@ -201,9 +219,9 @@ public class SkeletonConfig extends EJBag {
 			});
 		}
 	}
-	
+
 	private class ResetButton extends JButton {
-		
+
 		public ResetButton(String text, String joint) {
 			super(text);
 			addMouseListener(new MouseInputAdapter() {
@@ -214,9 +232,9 @@ public class SkeletonConfig extends EJBag {
 			});
 		}
 	}
-	
+
 	private class TimedResetButton extends JButton {
-		
+
 		public TimedResetButton(String text, String joint) {
 			super(text);
 			addMouseListener(new MouseInputAdapter() {

src/main/java/io/eiren/gui/SkeletonList.java

@@ -18,6 +18,8 @@ import io.eiren.vr.processor.HumanSkeleton;
 import io.eiren.vr.processor.TransformNode;
 
 public class SkeletonList extends EJBag {
+	
+	private static final long UPDATE_DELAY = 50;
 
 	Quaternion q = new Quaternion();
 	Vector3f v = new Vector3f();
@@ -26,6 +28,7 @@ public class SkeletonList extends EJBag {
 	private final VRServer server;
 	private final VRServerGUI gui;
 	private final List<NodeStatus> nodes = new FastList<>();
+	private long lastUpdate = 0;
 	
 	public SkeletonList(VRServer server, VRServerGUI gui) {
 		super();
@@ -62,6 +65,9 @@ public class SkeletonList extends EJBag {
 	
 	@VRServerThread
 	public void updateBones() {
+		if(lastUpdate + UPDATE_DELAY > System.currentTimeMillis())
+			return;
+		lastUpdate = System.currentTimeMillis();
 		java.awt.EventQueue.invokeLater(() -> {
 			for(int i = 0; i < nodes.size(); ++i)
 				nodes.get(i).update();

src/main/java/io/eiren/gui/TrackersList.java

@@ -1,6 +1,7 @@
 package io.eiren.gui;
 
 import java.awt.Color;
+import java.awt.Font;
 import java.awt.GridBagConstraints;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
@@ -34,14 +35,17 @@ import io.eiren.vr.trackers.TrackerWithTPS;
 
 public class TrackersList extends EJBox {
 	
+	private static final long UPDATE_DELAY = 50;
+	
 	Quaternion q = new Quaternion();
 	Vector3f v = new Vector3f();
 	float[] angles = new float[3];
 	
-	private List<TrackerRow> trackers = new FastList<>();
+	private List<TrackerPanel> trackers = new FastList<>();
 	
 	private final VRServer server;
 	private final VRServerGUI gui;
+	private long lastUpdate = 0;
 
 	public TrackersList(VRServer server, VRServerGUI gui) {
 		super(BoxLayout.PAGE_AXIS);
@@ -61,16 +65,42 @@ public class TrackersList extends EJBox {
 		
 		Class<? extends Tracker> currentClass = null;
 		
+		EJBox line = null;
+		boolean first = true;
+		
 		for(int i = 0; i < trackers.size(); ++i) {
-			add(Box.createVerticalStrut(3));
-			TrackerRow tr = trackers.get(i);
+			TrackerPanel tr = trackers.get(i);
 			Tracker t = tr.t;
+			if(t instanceof ReferenceAdjustedTracker)
+				t = ((ReferenceAdjustedTracker<?>) t).getTracker();
 			if(currentClass != t.getClass()) {
 				currentClass = t.getClass();
-				add(new JLabel(currentClass.getSimpleName()));
+				if(line != null)
+					line.add(Box.createHorizontalGlue());
+				line = null;
+				line = new EJBox(BoxLayout.LINE_AXIS);
+				line.add(Box.createHorizontalGlue());
+				JLabel nameLabel;
+				line.add(nameLabel = new JLabel(currentClass.getSimpleName()));
+				nameLabel.setFont(nameLabel.getFont().deriveFont(Font.BOLD));
+				line.add(Box.createHorizontalGlue());
+				add(line);
+				line = null;
+			}
+			
+			if(line == null) {
+				line = new EJBox(BoxLayout.LINE_AXIS);
+				add(Box.createVerticalStrut(3));
+				add(line);
+				first = true;
+			} else {
+				line.add(Box.createHorizontalStrut(3));
+				first = false;
 			}
-
 			tr.build();
+			line.add(tr);
+			if(!first)
+				line = null;
 		}
 		validate();
 		gui.refresh();
@@ -78,6 +108,9 @@ public class TrackersList extends EJBox {
 	
 	@ThreadSafe
 	public void updateTrackers() {
+		if(lastUpdate + UPDATE_DELAY > System.currentTimeMillis())
+			return;
+		lastUpdate = System.currentTimeMillis();
 		java.awt.EventQueue.invokeLater(() -> {
 			for(int i = 0; i < trackers.size(); ++i)
 				trackers.get(i).update();
@@ -87,12 +120,12 @@ public class TrackersList extends EJBox {
 	@ThreadSafe
 	public void newTrackerAdded(Tracker t) {
 		java.awt.EventQueue.invokeLater(() -> {
-			trackers.add(new TrackerRow(t));
+			trackers.add(new TrackerPanel(t));
 			build();
 		});
 	}
 	
-	private class TrackerRow extends EJBag {
+	private class TrackerPanel extends EJBag {
 		
 		final Tracker t;
 		JLabel position;
@@ -110,21 +143,23 @@ public class TrackersList extends EJBox {
 		JLabel correction;
 		
 		@AWTThread
-		public TrackerRow(Tracker t) {
+		public TrackerPanel(Tracker t) {
 			super();
 			this.t = t;
 		}
 
 		@SuppressWarnings("unchecked")
 		@AWTThread
-		public TrackerRow build() {
+		public TrackerPanel build() {
 			int row = 0;
 			
 			Tracker realTracker = t;
 			if(t instanceof ReferenceAdjustedTracker)
 				realTracker = ((ReferenceAdjustedTracker<? extends Tracker>) t).getTracker();
 			removeAll();
-			add(new JLabel(t.getName()), s(c(0, row, 0, GridBagConstraints.FIRST_LINE_START), 4, 1));
+			JLabel nameLabel;
+			add(nameLabel = new JLabel(t.getName()), s(c(0, row, 0, GridBagConstraints.FIRST_LINE_START), 4, 1));
+			nameLabel.setFont(nameLabel.getFont().deriveFont(Font.BOLD));
 			row++;
 			
 			if(t.userEditable()) {
@@ -171,13 +206,17 @@ public class TrackersList extends EJBox {
 				}
 				row++;
 			}
-			add(new JLabel("Rotation"), c(0, row, 0, GridBagConstraints.FIRST_LINE_START));
-			add(new JLabel("Position"), c(1, row, 0, GridBagConstraints.FIRST_LINE_START));
+			if(t.hasRotation())
+				add(new JLabel("Rotation"), c(0, row, 0, GridBagConstraints.FIRST_LINE_START));
+			if(t.hasPosition())
+				add(new JLabel("Position"), c(1, row, 0, GridBagConstraints.FIRST_LINE_START));
 			add(new JLabel("Ping"), c(2, row, 0, GridBagConstraints.FIRST_LINE_START));
 			add(new JLabel("TPS"), c(3, row, 0, GridBagConstraints.FIRST_LINE_START));
 			row++;
-			add(rotation = new JLabel("0 0 0"), c(0, row, 0, GridBagConstraints.FIRST_LINE_START));
-			add(position = new JLabel("0 0 0"), c(1, row, 0, GridBagConstraints.FIRST_LINE_START));
+			if(t.hasRotation())
+				add(rotation = new JLabel("0 0 0"), c(0, row, 0, GridBagConstraints.FIRST_LINE_START));
+			if(t.hasPosition())
+				add(position = new JLabel("0 0 0"), c(1, row, 0, GridBagConstraints.FIRST_LINE_START));
 			add(ping = new JLabel(""), c(2, row, 0, GridBagConstraints.FIRST_LINE_START));
 			if(realTracker instanceof TrackerWithTPS) {
 				add(tps = new JLabel("0"), c(3, row, 0, GridBagConstraints.FIRST_LINE_START));
@@ -222,7 +261,7 @@ public class TrackersList extends EJBox {
 		@SuppressWarnings("unchecked")
 		@AWTThread
 		public void update() {
-			if(position == null)
+			if(position == null && rotation == null)
 				return;
 			Tracker realTracker = t;
 			if(t instanceof ReferenceAdjustedTracker)
@@ -231,12 +270,14 @@ public class TrackersList extends EJBox {
 			t.getPosition(v);
 			q.toAngles(angles);
 			
-			position.setText(StringUtils.prettyNumber(v.x, 1)
-					+ " " + StringUtils.prettyNumber(v.y, 1)
-					+ " " + StringUtils.prettyNumber(v.z, 1));
-			rotation.setText(StringUtils.prettyNumber(angles[0] * FastMath.RAD_TO_DEG, 0)
-					+ " " + StringUtils.prettyNumber(angles[1] * FastMath.RAD_TO_DEG, 0)
-					+ " " + StringUtils.prettyNumber(angles[2] * FastMath.RAD_TO_DEG, 0));
+			if(position != null)
+				position.setText(StringUtils.prettyNumber(v.x, 1)
+						+ " " + StringUtils.prettyNumber(v.y, 1)
+						+ " " + StringUtils.prettyNumber(v.z, 1));
+			if(rotation != null)
+				rotation.setText(StringUtils.prettyNumber(angles[0] * FastMath.RAD_TO_DEG, 0)
+						+ " " + StringUtils.prettyNumber(angles[1] * FastMath.RAD_TO_DEG, 0)
+						+ " " + StringUtils.prettyNumber(angles[2] * FastMath.RAD_TO_DEG, 0));
 			status.setText(t.getStatus().toString().toLowerCase());
 			
 			if(realTracker instanceof TrackerWithTPS) {
@@ -279,14 +320,14 @@ public class TrackersList extends EJBox {
 	}
 	
 	private static int getTrackerSort(Tracker t) {
-		if(t instanceof HMDTracker)
-			return 0;
-		if(t instanceof ComputedTracker)
-			return 1;
-		if(t instanceof IMUTracker)
-			return 2;
 		if(t instanceof ReferenceAdjustedTracker)
-			return 5;
+			t = ((ReferenceAdjustedTracker<?>) t).getTracker();
+		if(t instanceof IMUTracker)
+			return 0;
+		if(t instanceof HMDTracker)
+			return 100;
+		if(t instanceof ComputedTracker)
+			return 200;
 		return 1000;
 	}
 }

src/main/java/io/eiren/gui/VRServerGUI.java

@@ -1,9 +1,12 @@
 package io.eiren.gui;
 
+import javax.imageio.ImageIO;
 import javax.swing.*;
 import javax.swing.border.EmptyBorder;
 import javax.swing.event.MouseInputAdapter;
 
+import io.eiren.util.MacOSX;
+import io.eiren.util.OperatingSystem;
 import io.eiren.util.StringUtils;
 import io.eiren.util.ann.AWTThread;
 import io.eiren.vr.Main;
@@ -11,21 +14,30 @@ import io.eiren.vr.VRServer;
 
 import java.awt.Component;
 import java.awt.Container;
+import java.awt.Dimension;
 import java.awt.Font;
+import java.awt.GraphicsConfiguration;
+import java.awt.Rectangle;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.ComponentEvent;
 import java.awt.event.MouseEvent;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
 
 import static javax.swing.BoxLayout.PAGE_AXIS;
 import static javax.swing.BoxLayout.LINE_AXIS;
 
 public class VRServerGUI extends JFrame {
 	
+	public static final String TITLE = "SlimeVR Server (" + Main.VERSION + ")";
+	
 	public final VRServer server;
 	private final TrackersList trackersList;
 	private final SkeletonList skeletonList;
 	private JButton resetButton;
-	private JScrollPane scroll;
 	private EJBox pane;
 	
 	private float zoom = 1.5f;
@@ -33,13 +45,29 @@ public class VRServerGUI extends JFrame {
 	
 	@AWTThread
 	public VRServerGUI(VRServer server) {
-		super("SlimeVR Server (" + Main.VERSION + ")");
+		super(TITLE);
 		try {
 			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
 		} catch(Exception e) {
 			e.printStackTrace();
 		}
-		//increaseFontSize();
+		if(OperatingSystem.getCurrentPlatform() == OperatingSystem.OSX)
+			MacOSX.setTitle(TITLE);
+		try {
+			List<BufferedImage> images = new ArrayList<BufferedImage>(6);
+			images.add(ImageIO.read(VRServerGUI.class.getResource("/icon16.png")));
+			images.add(ImageIO.read(VRServerGUI.class.getResource("/icon32.png")));
+			images.add(ImageIO.read(VRServerGUI.class.getResource("/icon48.png")));
+			images.add(ImageIO.read(VRServerGUI.class.getResource("/icon64.png")));
+			images.add(ImageIO.read(VRServerGUI.class.getResource("/icon128.png")));
+			images.add(ImageIO.read(VRServerGUI.class.getResource("/icon256.png")));
+			setIconImages(images);
+			if(OperatingSystem.getCurrentPlatform() == OperatingSystem.OSX) {
+				MacOSX.setIcons(images);
+			}
+		} catch(IOException e1) {
+			e1.printStackTrace();
+		}
 		
 		this.server = server;
 		
@@ -54,18 +82,45 @@ public class VRServerGUI extends JFrame {
 		this.trackersList = new TrackersList(server, this);
 		this.skeletonList = new SkeletonList(server, this);
 		
-		add(scroll = new JScrollPane(pane = new EJBox(PAGE_AXIS), ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED));
+		add(new JScrollPane(pane = new EJBox(PAGE_AXIS), ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED));
+		GraphicsConfiguration gc = getGraphicsConfiguration();
+		Rectangle screenBounds = gc.getBounds();
+		setMinimumSize(new Dimension(100, 100));
+		setSize(Math.min(server.config.getInt("window.width", 800), screenBounds.width), Math.min(server.config.getInt("window.height", 800), screenBounds.height));
+		setLocation(server.config.getInt("window.posx", screenBounds.x + (screenBounds.width - getSize().width) / 2), screenBounds.y + server.config.getInt("window.posy", (screenBounds.height - getSize().height) / 2));
+		
+		// Resize and close listeners to save position and size betwen launcher starts
+		addComponentListener(new AbstractComponentListener() {
+			@Override
+			public void componentResized(ComponentEvent e) {
+				saveFrameInfo();
+			}
+			
+			@Override
+			public void componentMoved(ComponentEvent e) {
+				saveFrameInfo();
+			}
+		});
 		
 		build();
 	}
 	
+	protected void saveFrameInfo() {
+		Rectangle b = getBounds();
+		server.config.setProperty("window.width", b.width);
+		server.config.setProperty("window.height", b.height);
+		server.config.setProperty("window.posx", b.x);
+		server.config.setProperty("window.posy", b.y);
+		server.saveConfig();
+	}
+	
 	public float getZoom() {
 		return this.zoom;
 	}
 	
 	public void refresh() {
 		// Pack and display
-		pack();
+		//pack();
 		setVisible(true);
 		java.awt.EventQueue.invokeLater(new Runnable() {
 			@Override
@@ -131,10 +186,10 @@ public class VRServerGUI extends JFrame {
 				JComboBox<String> trackersSelect;
 				add(trackersSelect = new JComboBox<>());
 				trackersSelect.addItem("Waist");
-				trackersSelect.addItem("Waist + Feet");
-				trackersSelect.addItem("Waist + Feet + Chest");
-				trackersSelect.addItem("Waist + Feet + Knees");
-				trackersSelect.addItem("Waist + Feet + Chest + Knees");
+				trackersSelect.addItem("Waist + Legs");
+				trackersSelect.addItem("Waist + Legs + Chest");
+				trackersSelect.addItem("Waist + Legs + Knees");
+				trackersSelect.addItem("Waist + Legs + Chest + Knees");
 				switch(server.config.getInt("virtualtrackers", 3)) {
 				case 1:
 					trackersSelect.setSelectedIndex(0);
@@ -193,7 +248,6 @@ public class VRServerGUI extends JFrame {
 		}});
 		
 		refresh();
-		setLocationRelativeTo(null);
 		
 		server.addOnTick(trackersList::updateTrackers);
 		server.addOnTick(skeletonList::updateBones);

src/main/java/io/eiren/gui/WiFiWindow.java

@@ -53,7 +53,7 @@ public class WiFiWindow extends JFrame {
 		
 		SerialPort[] ports = SerialPort.getCommPorts();
 		for(SerialPort port : ports) {
-			if(port.getDescriptivePortName().toLowerCase().contains("ch340") || port.getDescriptivePortName().toLowerCase().contains("cp21")) {
+			if(port.getDescriptivePortName().toLowerCase().contains("ch340") || port.getDescriptivePortName().toLowerCase().contains("cp21") || port.getDescriptivePortName().toLowerCase().contains("ch910")) {
 				trackerPort = port;
 				break;
 			}

src/main/java/io/eiren/vr/Main.java

@@ -7,7 +7,7 @@ import io.eiren.util.logging.LogManager;
 
 public class Main {
 	
-	public static String VERSION = "0.0.14";
+	public static String VERSION = "0.0.19";
 	
 	public static VRServer vrServer;
 	
@@ -29,6 +29,12 @@ public class Main {
 			new VRServerGUI(vrServer);
 		} catch(Throwable e) {
 			e.printStackTrace();
+			try {
+				Thread.sleep(2000L);
+			} catch(InterruptedException e2) {
+				e.printStackTrace();
+			}
+			System.exit(1); // Exit in case error happened on init and window not appeared, but some thread started
 		} finally {
 			try {
 				Thread.sleep(2000L);

src/main/java/io/eiren/vr/VRServer.java

@@ -2,6 +2,7 @@ package io.eiren.vr;
 
 import java.io.File;
 import java.io.FileInputStream;
+import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.net.InetAddress;
@@ -19,6 +20,7 @@ import io.eiren.util.ann.ThreadSecure;
 import io.eiren.util.ann.VRServerThread;
 import io.eiren.util.collections.FastList;
 import io.eiren.vr.bridge.NamedPipeVRBridge;
+import io.eiren.vr.bridge.SteamVRPipeInputBridge;
 import io.eiren.vr.bridge.VMCBridge;
 import io.eiren.vr.bridge.VRBridge;
 import io.eiren.vr.processor.HumanPoseProcessor;
@@ -57,6 +59,10 @@ public class VRServer extends Thread {
 		NamedPipeVRBridge driverBridge = new NamedPipeVRBridge(hmdTracker, shareTrackers, this);
 		tasks.add(() -> driverBridge.start());
 		bridges.add(driverBridge);
+		// Create named pipe bridge for SteamVR input
+		SteamVRPipeInputBridge steamVRInput = new SteamVRPipeInputBridge(this);
+		tasks.add(() -> steamVRInput.start());
+		bridges.add(steamVRInput);
 		
 		// Create VMCBridge
 		try {
@@ -98,8 +104,8 @@ public class VRServer extends Thread {
 	private void loadConfig() {
 		try {
 			config.load(new FileInputStream(new File("vrconfig.yml")));
-		} catch(IOException e) {
-			e.printStackTrace();
+		} catch(FileNotFoundException e) {
+			// Config file didn't exist, is not an error
 		} catch(YamlException e) {
 			e.printStackTrace();
 		}
@@ -143,7 +149,7 @@ public class VRServer extends Thread {
 	}
 
 	@ThreadSafe
-	public void saveConfig() {
+	public synchronized void saveConfig() {
 		List<YamlNode> nodes = config.getNodeList("trackers", null);
 		List<Map<String, Object>> trackersConfig = new FastList<>(nodes.size());
 		for(int i = 0; i < nodes.size(); ++i) {
@@ -189,14 +195,13 @@ public class VRServer extends Thread {
 					break;
 				task.run();
 			} while(true);
-			for(int i = 0; i < trackers.size(); ++i)
-				trackers.get(i).tick();
-			
 			for(int i = 0; i < onTick.size(); ++i) {
 				this.onTick.get(i).run();
 			}
 			for(int i = 0; i < bridges.size(); ++i)
 				bridges.get(i).dataRead();
+			for(int i = 0; i < trackers.size(); ++i)
+				trackers.get(i).tick();
 			humanPoseProcessor.update();
 			for(int i = 0; i < bridges.size(); ++i)
 				bridges.get(i).dataWrite();

src/main/java/io/eiren/vr/bridge/NamedPipeVRBridge.java

@@ -21,19 +21,20 @@ import io.eiren.vr.trackers.Tracker;
 import io.eiren.vr.trackers.TrackerStatus;
 
 public class NamedPipeVRBridge extends Thread implements VRBridge {
-	
+
+	private static final int MAX_COMMAND_LENGTH = 2048;
 	public static final String HMDPipeName = "\\\\.\\pipe\\HMDPipe";
 	public static final String TrackersPipeName = "\\\\.\\pipe\\TrackPipe";
 	public static final Charset ASCII = Charset.forName("ASCII");
-	
-	private final byte[] buffer = new byte[1024];
+
+	private final byte[] buffArray = new byte[1024];
+	private final StringBuilder commandBuilder = new StringBuilder(1024);
 	private final StringBuilder sbBuffer = new StringBuilder(1024);
 	private final Vector3f vBuffer = new Vector3f();
 	private final Vector3f vBuffer2 = new Vector3f();
 	private final Quaternion qBuffer = new Quaternion();
 	private final Quaternion qBuffer2 = new Quaternion();
 	
-	private final VRServer server;
 	private Pipe hmdPipe;
 	private final HMDTracker hmd;
 	private final List<Pipe> trackerPipes;
@@ -45,14 +46,13 @@ public class NamedPipeVRBridge extends Thread implements VRBridge {
 	
 	public NamedPipeVRBridge(HMDTracker hmd, List<? extends Tracker> shareTrackers, VRServer server) {
 		super("Named Pipe VR Bridge");
-		this.server = server;
 		this.hmd = hmd;
 		this.shareTrackers = new FastList<>(shareTrackers);
 		this.trackerPipes = new FastList<>(shareTrackers.size());
 		this.internalTrackers = new FastList<>(shareTrackers.size());
 		for(int i = 0; i < shareTrackers.size(); ++i) {
 			Tracker t = shareTrackers.get(i);
-			ComputedTracker ct = new ComputedTracker("internal://" + t.getName());
+			ComputedTracker ct = new ComputedTracker("internal://" + t.getName(), true, true);
 			ct.setStatus(TrackerStatus.OK);
 			this.internalTrackers.add(ct);
 		}
@@ -114,30 +114,28 @@ public class NamedPipeVRBridge extends Thread implements VRBridge {
 		}
 	}
 	
-	public boolean updateHMD() {
+	public boolean updateHMD() throws IOException {
 		if(hmdPipe.state == PipeState.OPEN) {
 			IntByReference bytesAvailable = new IntByReference(0);
 			if(Kernel32.INSTANCE.PeekNamedPipe(hmdPipe.pipeHandle, null, 0, null, bytesAvailable, null)) {
 				if(bytesAvailable.getValue() > 0) {
-					if(Kernel32.INSTANCE.ReadFile(hmdPipe.pipeHandle, buffer, buffer.length, bytesAvailable, null)) {
-						String str = new String(buffer, 0, bytesAvailable.getValue() - 1, ASCII);
-						String[] split = str.split("\n")[0].split(" ");
-						try {
-							double x = Double.parseDouble(split[0]);
-							double y = Double.parseDouble(split[1]);
-							double z = Double.parseDouble(split[2]);
-							double qw = Double.parseDouble(split[3]);
-							double qx = Double.parseDouble(split[4]);
-							double qy = Double.parseDouble(split[5]);
-							double qz = Double.parseDouble(split[6]);
-							
-							internalHMDTracker.position.set((float) x, (float) y, (float) z);
-							internalHMDTracker.rotation.set((float) qx, (float) qy, (float) qz, (float) qw);
-							internalHMDTracker.dataTick();
-							newHMDData.set(true);
-						} catch(NumberFormatException e) {
-							e.printStackTrace();
+					while(Kernel32.INSTANCE.ReadFile(hmdPipe.pipeHandle, buffArray, buffArray.length, bytesAvailable, null)) {
+						int bytesRead = bytesAvailable.getValue();
+						for(int i = 0; i < bytesRead; ++i) {
+							char c = (char) buffArray[i];
+							if(c == '\n') {
+								executeHMDInput();
+								commandBuilder.setLength(0);
+							} else {
+								commandBuilder.append(c);
+								if(commandBuilder.length() >= MAX_COMMAND_LENGTH) {
+									LogManager.log.severe("[VRBridge] Command from the pipe is too long, flushing buffer");
+									commandBuilder.setLength(0);
+								}
+							}
 						}
+						if(bytesRead < buffArray.length)
+							break; // Don't repeat, we read all available bytes
 					}
 					return true;
 				}
@@ -146,6 +144,30 @@ public class NamedPipeVRBridge extends Thread implements VRBridge {
 		return false;
 	}
 	
+	private void executeHMDInput() throws IOException {
+		String[] split = commandBuilder.toString().split(" ");
+		if(split.length < 7) {
+			LogManager.log.severe("[VRBridge] Short HMD data recieved: " + commandBuilder.toString());
+			return;
+		}
+		try {
+			double x = Double.parseDouble(split[0]);
+			double y = Double.parseDouble(split[1]);
+			double z = Double.parseDouble(split[2]);
+			double qw = Double.parseDouble(split[3]);
+			double qx = Double.parseDouble(split[4]);
+			double qy = Double.parseDouble(split[5]);
+			double qz = Double.parseDouble(split[6]);
+			
+			internalHMDTracker.position.set((float) x, (float) y, (float) z);
+			internalHMDTracker.rotation.set((float) qx, (float) qy, (float) qz, (float) qw);
+			internalHMDTracker.dataTick();
+			newHMDData.set(true);
+		} catch(NumberFormatException e) {
+			e.printStackTrace();
+		}
+	}
+	
 	public void updateTracker(int trackerId, boolean hmdUpdated) {
 		Tracker sensor = internalTrackers.get(trackerId);
 		if(sensor.getStatus().sendData) {
@@ -157,10 +179,10 @@ public class NamedPipeVRBridge extends Thread implements VRBridge {
 				sbBuffer.append(vBuffer.x).append(' ').append(vBuffer.y).append(' ').append(vBuffer.z).append(' ');
 				sbBuffer.append(qBuffer.getW()).append(' ').append(qBuffer.getX()).append(' ').append(qBuffer.getY()).append(' ').append(qBuffer.getZ()).append('\n');
 				String str = sbBuffer.toString();
-				System.arraycopy(str.getBytes(ASCII), 0, buffer, 0, str.length());
-				buffer[str.length()] = '\0';
+				System.arraycopy(str.getBytes(ASCII), 0, buffArray, 0, str.length());
+				buffArray[str.length()] = '\0';
 				IntByReference lpNumberOfBytesWritten = new IntByReference(0);
-				Kernel32.INSTANCE.WriteFile(trackerPipe.pipeHandle, buffer, str.length() + 1, lpNumberOfBytesWritten, null);
+				Kernel32.INSTANCE.WriteFile(trackerPipe.pipeHandle, buffArray, str.length() + 1, lpNumberOfBytesWritten, null);
 			}
 		}
 	}
@@ -171,11 +193,11 @@ public class NamedPipeVRBridge extends Thread implements VRBridge {
 	
 	private void initTrackerPipe(Pipe pipe, int trackerId) {
 		String trackerHello = this.shareTrackers.size() + " 0";
-		System.arraycopy(trackerHello.getBytes(ASCII), 0, buffer, 0, trackerHello.length());
-		buffer[trackerHello.length()] = '\0';
+		System.arraycopy(trackerHello.getBytes(ASCII), 0, buffArray, 0, trackerHello.length());
+		buffArray[trackerHello.length()] = '\0';
 		IntByReference lpNumberOfBytesWritten = new IntByReference(0);
 		Kernel32.INSTANCE.WriteFile(pipe.pipeHandle,
-			buffer,
+			buffArray,
 			trackerHello.length() + 1,
 			lpNumberOfBytesWritten,
 			null);
@@ -183,7 +205,7 @@ public class NamedPipeVRBridge extends Thread implements VRBridge {
 	
 	private boolean tryOpeningPipe(Pipe pipe) {
 		if(Kernel32.INSTANCE.ConnectNamedPipe(pipe.pipeHandle, null)) {
-			pipe.state = NamedPipeVRBridge.PipeState.OPEN;
+			pipe.state = PipeState.OPEN;
 			LogManager.log.info("[VRBridge] Pipe " + pipe.name + " is open");
 			return true;
 		}
@@ -246,21 +268,4 @@ public class NamedPipeVRBridge extends Thread implements VRBridge {
 		} catch(Exception e) {
 		}
 	}
-	
-	private static class Pipe {
-		final String name;
-		final HANDLE pipeHandle;
-		PipeState state = PipeState.CREATED;
-		
-		public Pipe(HANDLE pipeHandle, String name) {
-			this.pipeHandle = pipeHandle;
-			this.name = name;
-		}
-	}
-	
-	private static enum PipeState {
-		CREATED,
-		OPEN,
-		ERROR;
-	}
 }

src/main/java/io/eiren/vr/bridge/Pipe.java

@@ -0,0 +1,14 @@
+package io.eiren.vr.bridge;
+
+import com.sun.jna.platform.win32.WinNT.HANDLE;
+
+class Pipe {
+	final String name;
+	final HANDLE pipeHandle;
+	PipeState state = PipeState.CREATED;
+	
+	public Pipe(HANDLE pipeHandle, String name) {
+		this.pipeHandle = pipeHandle;
+		this.name = name;
+	}
+}

src/main/java/io/eiren/vr/bridge/PipeState.java

@@ -0,0 +1,7 @@
+package io.eiren.vr.bridge;
+
+enum PipeState {
+	CREATED,
+	OPEN,
+	ERROR;
+}

src/main/java/io/eiren/vr/bridge/SteamVRPipeInputBridge.java

@@ -0,0 +1,276 @@
+package io.eiren.vr.bridge;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.apache.commons.lang3.StringUtils;
+
+import com.jme3.math.Quaternion;
+import com.jme3.math.Vector3f;
+import com.sun.jna.platform.win32.Kernel32;
+import com.sun.jna.platform.win32.WinBase;
+import com.sun.jna.ptr.IntByReference;
+
+import io.eiren.util.collections.FastList;
+import io.eiren.util.logging.LogManager;
+import io.eiren.vr.VRServer;
+import io.eiren.vr.processor.TrackerBodyPosition;
+import io.eiren.vr.trackers.SteamVRTracker;
+import io.eiren.vr.trackers.TrackerStatus;
+
+public class SteamVRPipeInputBridge extends Thread implements VRBridge {
+
+	private static final int MAX_COMMAND_LENGTH = 2048;
+	public static final String PipeName = "\\\\.\\pipe\\SlimeVRInput";
+
+	private final byte[] buffArray = new byte[1024];
+	private final VRServer server;
+	private final StringBuilder commandBuilder = new StringBuilder(1024);
+	private final List<SteamVRTracker> trackers = new FastList<>();
+	private final Map<Integer, SteamVRTracker> trackersInternal = new HashMap<>();
+	private AtomicBoolean newData = new AtomicBoolean(false);
+	private final Vector3f vBuffer = new Vector3f();
+	private final Quaternion qBuffer = new Quaternion();
+	private Pipe pipe;
+	
+	public SteamVRPipeInputBridge(VRServer server) {
+		this.server = server;
+	}
+	
+	@Override
+	public void run() {
+		try {
+			createPipes();
+			while(true) {
+				waitForPipesToOpen();
+				if(areAllPipesOpen()) {
+					boolean pipesUpdated = updatePipes(); // Update at HMDs frequency
+					if(!pipesUpdated) {
+						Thread.sleep(5); // Up to 200Hz
+					}
+				} else {
+					Thread.sleep(10);
+				}
+			}
+		} catch(Exception e) {
+			e.printStackTrace();
+		}
+	}
+	
+	private void waitForPipesToOpen() {
+		if(pipe.state == PipeState.CREATED) {
+			tryOpeningPipe(pipe);
+		}
+	}
+	
+	public boolean updatePipes() throws IOException {
+		if(pipe.state == PipeState.OPEN) {
+			IntByReference bytesAvailable = new IntByReference(0);
+			if(Kernel32.INSTANCE.PeekNamedPipe(pipe.pipeHandle, null, 0, null, bytesAvailable, null)) {
+				if(bytesAvailable.getValue() > 0) {
+					while(Kernel32.INSTANCE.ReadFile(pipe.pipeHandle, buffArray, buffArray.length, bytesAvailable, null)) {
+						int bytesRead = bytesAvailable.getValue();
+						for(int i = 0; i < bytesRead; ++i) {
+							char c = (char) buffArray[i];
+							if(c == '\n') {
+								executeInputCommand();
+								commandBuilder.setLength(0);
+							} else {
+								commandBuilder.append(c);
+								if(commandBuilder.length() >= MAX_COMMAND_LENGTH) {
+									LogManager.log.severe("[SteamVRPipeInputBridge] Command from the pipe is too long, flushing buffer");
+									commandBuilder.setLength(0);
+								}
+							}
+						}
+						if(bytesRead < buffArray.length)
+							break; // Don't repeat, we read all available bytes
+					}
+					return true;
+				}
+			}
+		}
+		return false;
+	}
+	
+	private void executeInputCommand() throws IOException {
+		String[] command = commandBuilder.toString().split(" ");
+		switch(command[0]) {
+		case "ADD": // Add new tracker
+			if(command.length < 4) {
+				LogManager.log.severe("[SteamVRPipeInputBridge] Error in ADD command. Command requires at least 4 arguments. Supplied: " + commandBuilder.toString());
+				return;
+			}
+			SteamVRTracker internalTracker = new SteamVRTracker(Integer.parseInt(command[1]), StringUtils.join(command, " ", 3, command.length), true, true);
+			int roleId = Integer.parseInt(command[2]);
+			if(roleId >= 0 && roleId < SteamVRInputRoles.values.length) {
+				SteamVRInputRoles svrRole = SteamVRInputRoles.values[roleId];
+				internalTracker.bodyPosition = svrRole.bodyPosition;
+			}
+			SteamVRTracker oldTracker;
+			synchronized(trackersInternal) {
+				oldTracker = trackersInternal.put(internalTracker.id, internalTracker);
+			}
+			if(oldTracker != null) {
+				LogManager.log.severe("[SteamVRPipeInputBridge] New tracker added with the same id. Supplied: " + commandBuilder.toString());
+				return;
+			}
+			newData.set(true);
+			break;
+		case "UPD": // Update tracker data
+			if(command.length < 9) {
+				LogManager.log.severe("[SteamVRPipeInputBridge] Error in UPD command. Command requires at least 9 arguments. Supplied: " + commandBuilder.toString());
+				return;
+			}
+			int id = Integer.parseInt(command[1]);
+			double x = Double.parseDouble(command[2]);
+			double y = Double.parseDouble(command[3]);
+			double z = Double.parseDouble(command[4]);
+			double qw = Double.parseDouble(command[5]);
+			double qx = Double.parseDouble(command[6]);
+			double qy = Double.parseDouble(command[7]);
+			double qz = Double.parseDouble(command[8]);
+			internalTracker = trackersInternal.get(id);
+			if(internalTracker != null) {
+				internalTracker.position.set((float) x, (float) y, (float) z);
+				internalTracker.rotation.set((float) qx, (float) qy, (float) qz, (float) qw);
+				internalTracker.dataTick();
+				newData.set(true);
+			}
+			break;
+		case "STA": // Update tracker status
+			if(command.length < 3) {
+				LogManager.log.severe("[SteamVRPipeInputBridge] Error in STA command. Command requires at least 3 arguments. Supplied: " + commandBuilder.toString());
+				return;
+			}
+			id = Integer.parseInt(command[1]);
+			int status = Integer.parseInt(command[2]);
+			TrackerStatus st = TrackerStatus.getById(status);
+			if(st == null) {
+				LogManager.log.severe("[SteamVRPipeInputBridge] Unrecognized status id. Supplied: " + commandBuilder.toString());
+				return;
+			}
+			internalTracker = trackersInternal.get(id);
+			if(internalTracker != null) {
+				internalTracker.setStatus(st);
+				newData.set(true);
+			}
+			break;
+		}
+	}
+	
+	@Override
+	public void dataRead() {
+		// Not used, only input
+	}
+	
+	@Override
+	public void dataWrite() {
+		if(newData.getAndSet(false)) {
+			if(trackers.size() < trackersInternal.size()) {
+				// Add new trackers
+				synchronized(trackersInternal) {
+					Iterator<SteamVRTracker> iterator = trackersInternal.values().iterator();
+					internal: while(iterator.hasNext()) {
+						SteamVRTracker internalTracker = iterator.next();
+						for(int i = 0; i < trackers.size(); ++i) {
+							SteamVRTracker t = trackers.get(i);
+							if(t.id == internalTracker.id)
+								continue internal;
+						}
+						// Tracker is not found in current trackers
+						SteamVRTracker tracker = new SteamVRTracker(internalTracker.id, internalTracker.getName(), true, true);
+						tracker.bodyPosition = internalTracker.bodyPosition;
+						trackers.add(tracker);
+						server.registerTracker(tracker);
+					}
+				}
+			}
+			for(int i = 0; i < trackers.size(); ++i) {
+				SteamVRTracker tracker = trackers.get(i);
+				SteamVRTracker internal = trackersInternal.get(tracker.id);
+				if(internal == null)
+					throw new NullPointerException("Lost internal tracker somehow: " + tracker.id); // Shouln't really happen even, but better to catch it like this
+				if(internal.getPosition(vBuffer))
+					tracker.position.set(vBuffer);
+				if(internal.getRotation(qBuffer))
+					tracker.rotation.set(qBuffer);
+				tracker.setStatus(internal.getStatus());
+				tracker.dataTick();
+			}
+		}
+	}
+	
+	private boolean tryOpeningPipe(Pipe pipe) {
+		if(Kernel32.INSTANCE.ConnectNamedPipe(pipe.pipeHandle, null)) {
+			pipe.state = PipeState.OPEN;
+			LogManager.log.info("[SteamVRPipeInputBridge] Pipe " + pipe.name + " is open");
+			return true;
+		}
+		
+		LogManager.log.info("[SteamVRPipeInputBridge] Error connecting to pipe " + pipe.name + ": " + Kernel32.INSTANCE.GetLastError());
+		return false;
+	}
+	
+	private boolean areAllPipesOpen() {
+		if(pipe == null || pipe.state == PipeState.CREATED) {
+			return false;
+		}
+		return true;
+	}
+	
+	private void createPipes() throws IOException {
+		try {
+			pipe = new Pipe(Kernel32.INSTANCE.CreateNamedPipe(PipeName, WinBase.PIPE_ACCESS_DUPLEX, // dwOpenMode
+					WinBase.PIPE_TYPE_BYTE | WinBase.PIPE_READMODE_BYTE | WinBase.PIPE_WAIT, // dwPipeMode
+					1, // nMaxInstances,
+					1024 * 16, // nOutBufferSize,
+					1024 * 16, // nInBufferSize,
+					0, // nDefaultTimeOut,
+					null), PipeName); // lpSecurityAttributes
+			LogManager.log.info("[SteamVRPipeInputBridge] Pipe " + pipe.name + " created");
+			if(WinBase.INVALID_HANDLE_VALUE.equals(pipe.pipeHandle))
+				throw new IOException("Can't open " + PipeName + " pipe: " + Kernel32.INSTANCE.GetLastError());
+			LogManager.log.info("[SteamVRPipeInputBridge] Pipes are open");
+		} catch(IOException e) {
+			safeDisconnect(pipe);
+			throw e;
+		}
+	}
+	
+	public static void safeDisconnect(Pipe pipe) {
+		try {
+			if(pipe != null && pipe.pipeHandle != null)
+				Kernel32.INSTANCE.DisconnectNamedPipe(pipe.pipeHandle);
+		} catch(Exception e) {
+		}
+	}
+	
+	public enum SteamVRInputRoles {
+		HEAD(TrackerBodyPosition.HMD),
+		LEFT_HAND(TrackerBodyPosition.LEFT_CONTROLLER),
+		RIGHT_HAND(TrackerBodyPosition.RIGHT_CONTROLLER),
+		LEFT_FOOT(TrackerBodyPosition.LEFT_FOOT),
+		RIGHT_FOOT(TrackerBodyPosition.RIGHT_FOOT),
+		LEFT_SHOULDER(TrackerBodyPosition.NONE),
+		RIGHT_SHOULDER(TrackerBodyPosition.NONE),
+		LEFT_ELBOW(TrackerBodyPosition.NONE),
+		RIGHT_ELBOW(TrackerBodyPosition.NONE),
+		LEFT_KNEE(TrackerBodyPosition.LEFT_LEG),
+		RIGHT_KNEE(TrackerBodyPosition.RIGHT_LEG),
+		WAIST(TrackerBodyPosition.WAIST),
+		CHEST(TrackerBodyPosition.CHEST),
+		;
+		
+		private static final SteamVRInputRoles[] values = values();
+		public final TrackerBodyPosition bodyPosition;
+		
+		private SteamVRInputRoles(TrackerBodyPosition slimeVrPosition) {
+			this.bodyPosition = slimeVrPosition;
+		}
+	}
+}

src/main/java/io/eiren/vr/processor/ComputedHumanPoseTracker.java

@@ -10,7 +10,7 @@ public class ComputedHumanPoseTracker extends ComputedTracker implements Tracker
 	protected BufferedTimer timer = new BufferedTimer(1f);
 
 	public ComputedHumanPoseTracker(ComputedHumanPoseTrackerPosition skeletonPosition) {
-		super("human://" + skeletonPosition.name());
+		super("human://" + skeletonPosition.name(), true, true);
 		this.skeletonPosition = skeletonPosition;
 	}
 	

src/main/java/io/eiren/vr/processor/HumanPoseProcessor.java

@@ -10,7 +10,6 @@ import io.eiren.vr.VRServer;
 import io.eiren.vr.trackers.HMDTracker;
 import io.eiren.vr.trackers.Tracker;
 import io.eiren.vr.trackers.TrackerStatus;
-import io.eiren.vr.trackers.TrackerUtils;
 
 public class HumanPoseProcessor {
 	
@@ -85,29 +84,10 @@ public class HumanPoseProcessor {
 
 	@VRServerThread
 	private void updateSekeltonModel() {
-		boolean hasWaist = false;
-		boolean hasBothLegs = false;
-		List<Tracker> allTrackers = server.getAllTrackers();
-		Tracker waist = TrackerUtils.findTrackerForBodyPosition(allTrackers, TrackerBodyPosition.WAIST, TrackerBodyPosition.CHEST);
-		Tracker leftAnkle = TrackerUtils.findTrackerForBodyPosition(allTrackers, TrackerBodyPosition.LEFT_ANKLE, TrackerBodyPosition.LEFT_LEG);
-		Tracker rightAnkle = TrackerUtils.findTrackerForBodyPosition(allTrackers, TrackerBodyPosition.RIGHT_ANKLE, TrackerBodyPosition.RIGHT_LEG);
-		if(waist != null)
-			hasWaist = true;
-		if(leftAnkle != null && rightAnkle != null)
-			hasBothLegs = true;
-		if(!hasWaist) {
-			skeleton = null; // Can't track anything without waist
-		} else if(hasBothLegs) {
-			disconnectAllTrackers();
-			skeleton = new HumanSkeletonWithLegs(server, computedTrackers);
-			for(int i = 0; i < onSkeletonUpdated.size(); ++i)
-				onSkeletonUpdated.get(i).accept(skeleton);
-		} else {
-			disconnectAllTrackers();
-			skeleton = new HumanSkeletonWithWaist(server, computedTrackers);
-			for(int i = 0; i < onSkeletonUpdated.size(); ++i)
-				onSkeletonUpdated.get(i).accept(skeleton);
-		}
+		disconnectAllTrackers();
+		skeleton = new HumanSkeletonWithLegs(server, computedTrackers);
+		for(int i = 0; i < onSkeletonUpdated.size(); ++i)
+			onSkeletonUpdated.get(i).accept(skeleton);
 	}
 
 	@VRServerThread

src/main/java/io/eiren/vr/processor/HumanSkeletonWithLegs.java

@@ -69,11 +69,11 @@ public class HumanSkeletonWithLegs extends HumanSkeletonWithWaist {
 	public HumanSkeletonWithLegs(VRServer server, List<ComputedHumanPoseTracker> computedTrackers) {
 		super(server, computedTrackers);
 		List<Tracker> allTracekrs = server.getAllTrackers();
-		this.leftLegTracker = TrackerUtils.findTrackerForBodyPosition(allTracekrs, TrackerBodyPosition.LEFT_LEG, TrackerBodyPosition.LEFT_ANKLE);
-		this.leftAnkleTracker = TrackerUtils.findTrackerForBodyPosition(allTracekrs, TrackerBodyPosition.LEFT_ANKLE, TrackerBodyPosition.LEFT_LEG);
+		this.leftLegTracker = TrackerUtils.findTrackerForBodyPositionOrEmpty(allTracekrs, TrackerBodyPosition.LEFT_LEG, TrackerBodyPosition.LEFT_ANKLE);
+		this.leftAnkleTracker = TrackerUtils.findTrackerForBodyPositionOrEmpty(allTracekrs, TrackerBodyPosition.LEFT_ANKLE, TrackerBodyPosition.LEFT_LEG);
 		this.leftFootTracker = TrackerUtils.findTrackerForBodyPosition(allTracekrs, TrackerBodyPosition.LEFT_FOOT);
-		this.rightLegTracker = TrackerUtils.findTrackerForBodyPosition(allTracekrs, TrackerBodyPosition.RIGHT_LEG, TrackerBodyPosition.RIGHT_ANKLE);
-		this.rightAnkleTracker = TrackerUtils.findTrackerForBodyPosition(allTracekrs, TrackerBodyPosition.RIGHT_ANKLE, TrackerBodyPosition.RIGHT_LEG);
+		this.rightLegTracker = TrackerUtils.findTrackerForBodyPositionOrEmpty(allTracekrs, TrackerBodyPosition.RIGHT_LEG, TrackerBodyPosition.RIGHT_ANKLE);
+		this.rightAnkleTracker = TrackerUtils.findTrackerForBodyPositionOrEmpty(allTracekrs, TrackerBodyPosition.RIGHT_ANKLE, TrackerBodyPosition.RIGHT_LEG);
 		this.rightFootTracker = TrackerUtils.findTrackerForBodyPosition(allTracekrs, TrackerBodyPosition.RIGHT_FOOT);
 		ComputedHumanPoseTracker lat = null;
 		ComputedHumanPoseTracker rat = null;
@@ -90,6 +90,10 @@ public class HumanSkeletonWithLegs extends HumanSkeletonWithWaist {
 			if(t.skeletonPosition == ComputedHumanPoseTrackerPosition.RIGHT_KNEE)
 				rkt = t;
 		}
+		if(lat == null)
+			lat = new ComputedHumanPoseTracker(ComputedHumanPoseTrackerPosition.LEFT_FOOT);
+		if(rat == null)
+			rat = new ComputedHumanPoseTracker(ComputedHumanPoseTrackerPosition.RIGHT_FOOT);
 		computedLeftFootTracker = lat;
 		computedRightFootTracker = rat;
 		computedLeftKneeTracker = lkt;
@@ -100,7 +104,7 @@ public class HumanSkeletonWithLegs extends HumanSkeletonWithWaist {
 		kneeHeight = server.config.getFloat("body.kneeHeight", kneeHeight);
 		legsLength = server.config.getFloat("body.legsLength", legsLength);
 		footLength = server.config.getFloat("body.footLength", footLength);
-		extendedPelvisModel = server.config.getBoolean("body.model.extendedPelvis", extendedPelvisModel);
+		//extendedPelvisModel = server.config.getBoolean("body.model.extendedPelvis", extendedPelvisModel);
 		extendedKneeModel = server.config.getBoolean("body.model.extendedKnee", extendedKneeModel);
 		
 		waistNode.attachChild(leftHipNode);
@@ -197,6 +201,7 @@ public class HumanSkeletonWithLegs extends HumanSkeletonWithWaist {
 		}
 	}
 	
+	@Override
 	public boolean getSkeletonConfigBoolean(String config) {
 		switch(config) {
 		case "Extended pelvis model":
@@ -204,9 +209,10 @@ public class HumanSkeletonWithLegs extends HumanSkeletonWithWaist {
 		case "Extended knee model":
 			return extendedKneeModel;
 		}
-		return false;
+		return super.getSkeletonConfigBoolean(config);
 	}
 	
+	@Override
 	public void setSkeletonConfigBoolean(String config, boolean newState) {
 		switch(config) {
 		case "Extended pelvis model":
@@ -216,6 +222,10 @@ public class HumanSkeletonWithLegs extends HumanSkeletonWithWaist {
 		case "Extended knee model":
 			extendedKneeModel = newState;
 			server.config.setProperty("body.model.extendedKnee", newState);
+			break;
+		default:
+			super.setSkeletonConfigBoolean(config, newState);
+			break;
 		}
 	}
 	
@@ -262,9 +272,12 @@ public class HumanSkeletonWithLegs extends HumanSkeletonWithWaist {
 			// Average pelvis between two legs
 			leftHipNode.localTransform.getRotation(hipBuf);
 			rightHipNode.localTransform.getRotation(kneeBuf);
-			kneeBuf.slerp(hipBuf, 0.5f);
+			kneeBuf.nlerp(hipBuf, 0.5f);
+			chestNode.localTransform.getRotation(hipBuf);
+			kneeBuf.nlerp(hipBuf, 0.3333333f);
 			waistNode.localTransform.setRotation(kneeBuf);
 			// TODO : Use vectors to add like 50% of wasit tracker yaw to waist node to reduce drift and let user take weird poses
+			// TODO Set virtual waist node yaw to that of waist node
 		}
 	}
 	

src/main/java/io/eiren/vr/processor/HumanSkeletonWithWaist.java

@@ -21,7 +21,7 @@ public class HumanSkeletonWithWaist extends HumanSkeleton {
 	
 	protected final Map<String, Float> configMap = new HashMap<>();
 	protected final VRServer server;
-
+	
 	protected final float[] waistAngles = new float[3];
 	protected final Quaternion qBuf = new Quaternion();
 	protected final Vector3f vBuf = new Vector3f();
@@ -57,11 +57,11 @@ public class HumanSkeletonWithWaist extends HumanSkeleton {
 	 * Distance from eyes to ear
 	 */
 	protected float headShift = HEAD_SHIFT_DEFAULT;
-
+	
 	public HumanSkeletonWithWaist(VRServer server, List<ComputedHumanPoseTracker> computedTrackers) {
 		List<Tracker> allTracekrs = server.getAllTrackers();
-		this.waistTracker = TrackerUtils.findTrackerForBodyPosition(allTracekrs, TrackerBodyPosition.WAIST, TrackerBodyPosition.CHEST);
-		this.chestTracker = TrackerUtils.findTrackerForBodyPosition(allTracekrs, TrackerBodyPosition.CHEST, TrackerBodyPosition.WAIST);
+		this.waistTracker = TrackerUtils.findTrackerForBodyPositionOrEmpty(allTracekrs, TrackerBodyPosition.WAIST, TrackerBodyPosition.CHEST);
+		this.chestTracker = TrackerUtils.findTrackerForBodyPositionOrEmpty(allTracekrs, TrackerBodyPosition.CHEST, TrackerBodyPosition.WAIST);
 		this.hmdTracker = server.hmdTracker;
 		this.server = server;
 		ComputedHumanPoseTracker cwt = null;
@@ -114,16 +114,16 @@ public class HumanSkeletonWithWaist extends HumanSkeleton {
 			resetSkeletonConfig("Waist");
 			resetSkeletonConfig("Chest");
 			break;
-		case "Head": 
+		case "Head":
 			setSkeletonConfig(joint, HEAD_SHIFT_DEFAULT);
 			break;
-		case "Neck": 
+		case "Neck":
 			setSkeletonConfig(joint, NECK_LENGTH_DEFAULT);
 			break;
-		case "Virtual waist": 
+		case "Virtual waist":
 			setSkeletonConfig(joint, 0.0f);
 			break;
-		case "Chest": 
+		case "Chest":
 			setSkeletonConfig(joint, waistDistance / 2.0f);
 			break;
 		case "Waist": // Puts Waist in the middle of the height
@@ -141,7 +141,7 @@ public class HumanSkeletonWithWaist extends HumanSkeleton {
 	public Map<String, Float> getSkeletonConfig() {
 		return configMap;
 	}
-
+	
 	@Override
 	public void setSkeletonConfig(String joint, float newLength) {
 		configMap.put(joint, newLength);
@@ -177,6 +177,13 @@ public class HumanSkeletonWithWaist extends HumanSkeleton {
 		}
 	}
 	
+	public boolean getSkeletonConfigBoolean(String config) {
+		return false;
+	}
+	
+	public void setSkeletonConfigBoolean(String config, boolean newState) {
+	}
+	
 	@Override
 	public TransformNode getRootNode() {
 		return hmdNode;
@@ -198,7 +205,7 @@ public class HumanSkeletonWithWaist extends HumanSkeleton {
 			hmdNode.localTransform.setRotation(qBuf);
 			headNode.localTransform.setRotation(qBuf);
 		}
-			
+		
 		if(chestTracker.getRotation(qBuf))
 			neckNode.localTransform.setRotation(qBuf);
 		

src/main/java/io/eiren/vr/processor/TrackerBodyPosition.java

@@ -15,6 +15,8 @@ public enum TrackerBodyPosition {
 	RIGHT_ANKLE("body:right_ankle"),
 	LEFT_FOOT("body:left_foot"),
 	RIGHT_FOOT("body:right_foot"),
+	LEFT_CONTROLLER("body:left_controller"),
+	RIGHT_CONTROLLER("body:right_conroller"),
 	;
 	
 	public final String designation;
@@ -32,6 +34,6 @@ public enum TrackerBodyPosition {
 	
 	static {
 		for(TrackerBodyPosition tbp : values())
-			byDesignation.put(tbp.designation, tbp);
+			byDesignation.put(tbp.designation.toLowerCase(), tbp);
 	}
 }

src/main/java/io/eiren/vr/trackers/ComputedTracker.java

@@ -12,9 +12,13 @@ public class ComputedTracker implements Tracker {
 	protected final String name;
 	protected TrackerStatus status = TrackerStatus.DISCONNECTED;
 	public TrackerBodyPosition bodyPosition = null;
+	protected final boolean hasRotation;
+	protected final boolean hasPosition;
 	
-	public ComputedTracker(String name) {
+	public ComputedTracker(String name, boolean hasRotation, boolean hasPosition) {
 		this.name = name;
+		this.hasRotation = hasRotation;
+		this.hasPosition = hasPosition;
 	}
 	
 	@Override
@@ -24,7 +28,10 @@ public class ComputedTracker implements Tracker {
 	
 	@Override
 	public void loadConfig(TrackerConfig config) {
-		bodyPosition = TrackerBodyPosition.getByDesignation(config.designation);
+		// Loading a config is an act of user editing, therefore it shouldn't not be allowed if editing is not allowed
+		if (userEditable()) {
+			bodyPosition = TrackerBodyPosition.getByDesignation(config.designation);
+		}
 	}
 	
 	@Override
@@ -84,4 +91,19 @@ public class ComputedTracker implements Tracker {
 	@Override
 	public void tick() {
 	}
+
+	@Override
+	public boolean hasRotation() {
+		return hasRotation;
+	}
+
+	@Override
+	public boolean hasPosition() {
+		return hasPosition;
+	}
+
+	@Override
+	public boolean isComputed() {
+		return true;
+	}
 }

src/main/java/io/eiren/vr/trackers/HMDTracker.java

@@ -8,7 +8,7 @@ public class HMDTracker extends ComputedTracker implements TrackerWithTPS {
 	protected BufferedTimer timer = new BufferedTimer(1f);
 	
 	public HMDTracker(String name) {
-		super(name);
+		super(name, true, true);
 		setBodyPosition(TrackerBodyPosition.HMD);
 	}
 	
@@ -21,4 +21,9 @@ public class HMDTracker extends ComputedTracker implements TrackerWithTPS {
 	public void dataTick() {
 		timer.update();
 	}
+
+	@Override
+	public boolean isComputed() {
+		return false;
+	}
 }

src/main/java/io/eiren/vr/trackers/IMUTracker.java

@@ -52,17 +52,20 @@ public class IMUTracker implements Tracker, TrackerWithTPS, TrackerWithBattery {
 	
 	@Override
 	public void loadConfig(TrackerConfig config) {
-		if(config.mountingRotation != null) {
-			mounting = TrackerMountingRotation.valueOf(config.mountingRotation);
-			if(mounting != null) {
-				rotAdjust.set(mounting.quaternion);
+		// Loading a config is an act of user editing, therefore it shouldn't not be allowed if editing is not allowed
+		if (userEditable()) {
+			if(config.mountingRotation != null) {
+				mounting = TrackerMountingRotation.valueOf(config.mountingRotation);
+				if(mounting != null) {
+					rotAdjust.set(mounting.quaternion);
+				} else {
+					rotAdjust.loadIdentity();
+				}
 			} else {
 				rotAdjust.loadIdentity();
 			}
-		} else {
-			rotAdjust.loadIdentity();
+			bodyPosition = TrackerBodyPosition.getByDesignation(config.designation);
 		}
-		bodyPosition = TrackerBodyPosition.getByDesignation(config.designation);
 	}
 	
 	public TrackerMountingRotation getMountingRotation() {
@@ -225,4 +228,19 @@ public class IMUTracker implements Tracker, TrackerWithTPS, TrackerWithBattery {
 				byStatus[ca.status] = ca;
 		}
 	}
+
+	@Override
+	public boolean hasRotation() {
+		return true;
+	}
+
+	@Override
+	public boolean hasPosition() {
+		return false;
+	}
+
+	@Override
+	public boolean isComputed() {
+		return false;
+	}
 }

src/main/java/io/eiren/vr/trackers/ReferenceAdjustedTracker.java

@@ -146,4 +146,19 @@ public class ReferenceAdjustedTracker<E extends Tracker> implements Tracker {
 	public void tick() {
 		tracker.tick();
 	}
-}
+
+	@Override
+	public boolean hasRotation() {
+		return tracker.hasRotation();
+	}
+
+	@Override
+	public boolean hasPosition() {
+		return tracker.hasPosition();
+	}
+
+	@Override
+	public boolean isComputed() {
+		return tracker.isComputed();
+	}
+}

src/main/java/io/eiren/vr/trackers/SteamVRTracker.java

@@ -0,0 +1,34 @@
+package io.eiren.vr.trackers;
+
+import io.eiren.util.BufferedTimer;
+
+public class SteamVRTracker extends ComputedTracker implements TrackerWithTPS {
+
+	public final int id;
+	protected BufferedTimer timer = new BufferedTimer(1f);
+	
+	public SteamVRTracker(int id, String name, boolean hasRotation, boolean hasPosition) {
+		super(name, hasRotation, hasPosition);
+		this.id = id;
+	}
+	
+	@Override
+	public float getTPS() {
+		return timer.getAverageFPS();
+	}
+	
+	@Override
+	public void dataTick() {
+		timer.update();
+	}
+	
+	@Override
+	public boolean userEditable() {
+		return true;
+	}
+
+	@Override
+	public boolean isComputed() {
+		return false;
+	}
+}

src/main/java/io/eiren/vr/trackers/Tracker.java

@@ -32,4 +32,10 @@ public interface Tracker {
 	public void setBodyPosition(TrackerBodyPosition position);
 	
 	public boolean userEditable();
+	
+	public boolean hasRotation();
+	
+	public boolean hasPosition();
+
+	public boolean isComputed();
 }

src/main/java/io/eiren/vr/trackers/TrackerStatus.java

@@ -2,15 +2,31 @@ package io.eiren.vr.trackers;
 
 public enum TrackerStatus {
 	
-	DISCONNECTED(false),
-	OK(true),
-	BUSY(true),
-	ERROR(false),
+	DISCONNECTED(0, false),
+	OK(1, true),
+	BUSY(2, true),
+	ERROR(3, false),
+	OCCLUDED(4, false),
 	;
 	
+	private static final TrackerStatus byId[] = new TrackerStatus[5];
+	
+	public final int id;
 	public final boolean sendData;
 	
-	private TrackerStatus(boolean sendData) {
+	private TrackerStatus(int id, boolean sendData) {
 		this.sendData = sendData;
+		this.id = id;
+	}
+	
+	public static TrackerStatus getById(int id) {
+		if(id < 0 || id >= byId.length)
+			return null;
+		return byId[id];
+	}
+	
+	static {
+		for(TrackerStatus st : values())
+			byId[st.id] = st;
 	}
 }

src/main/java/io/eiren/vr/trackers/TrackerUtils.java

@@ -8,20 +8,56 @@ public class TrackerUtils {
 	
 	private TrackerUtils() {
 	}
-	
-	public static Tracker findTrackerForBodyPosition(List<Tracker> allTrackers, TrackerBodyPosition position) {
-		for(int i = 0; i < allTrackers.size(); ++i) {
-			Tracker t = allTrackers.get(i);
-			if(t.getBodyPosition() == position)
+
+	public static <T extends Tracker> T findTrackerForBodyPosition(T[] allTrackers, TrackerBodyPosition position) {
+		for(int i = 0; i < allTrackers.length; ++i) {
+			T t = allTrackers[i];
+			if(t != null && t.getBodyPosition() == position)
 				return t;
 		}
 		return null;
 	}
-	
-	public static Tracker findTrackerForBodyPosition(List<Tracker> allTrackers, TrackerBodyPosition position, TrackerBodyPosition altPosition) {
-		Tracker t = findTrackerForBodyPosition(allTrackers, position);
+
+	public static <T extends Tracker> T findTrackerForBodyPosition(List<T> allTrackers, TrackerBodyPosition position) {
+		for(int i = 0; i < allTrackers.size(); ++i) {
+			T t = allTrackers.get(i);
+			if(t != null && t.getBodyPosition() == position)
+				return t;
+		}
+		return null;
+	}
+
+	public static <T extends Tracker> T findTrackerForBodyPosition(List<T> allTrackers, TrackerBodyPosition position, TrackerBodyPosition altPosition) {
+		T t = findTrackerForBodyPosition(allTrackers, position);
 		if(t != null)
 			return t;
 		return findTrackerForBodyPosition(allTrackers, altPosition);
 	}
+
+	public static <T extends Tracker> T findTrackerForBodyPosition(T[] allTrackers, TrackerBodyPosition position, TrackerBodyPosition altPosition) {
+		T t = findTrackerForBodyPosition(allTrackers, position);
+		if(t != null)
+			return t;
+		return findTrackerForBodyPosition(allTrackers, altPosition);
+	}
+
+	public static Tracker findTrackerForBodyPositionOrEmpty(List<? extends Tracker> allTrackers, TrackerBodyPosition position, TrackerBodyPosition altPosition) {
+		Tracker t = findTrackerForBodyPosition(allTrackers, position);
+		if(t != null)
+			return t;
+		t = findTrackerForBodyPosition(allTrackers, altPosition);
+		if(t != null)
+			return t;
+		return new ComputedTracker("Empty tracker", false, false);
+	}
+
+	public static Tracker findTrackerForBodyPositionOrEmpty(Tracker[] allTrackers, TrackerBodyPosition position, TrackerBodyPosition altPosition) {
+		Tracker t = findTrackerForBodyPosition(allTrackers, position);
+		if(t != null)
+			return t;
+		t = findTrackerForBodyPosition(allTrackers, altPosition);
+		if(t != null)
+			return t;
+		return new ComputedTracker("Empty tracker", false, false);
+	}
 }

src/main/java/io/eiren/vr/trackers/TrackersUDPServer.java

@@ -4,6 +4,7 @@ import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.net.DatagramPacket;
 import java.net.DatagramSocket;
+import java.net.InetAddress;
 import java.net.SocketAddress;
 import java.net.SocketTimeoutException;
 import java.nio.ByteBuffer;
@@ -39,7 +40,7 @@ public class TrackersUDPServer extends Thread {
 	private final Quaternion buf = new Quaternion();
 	private final Random random = new Random();
 	private final List<TrackerConnection> trackers = new FastList<>();
-	private final Map<SocketAddress, TrackerConnection> trackersMap = new HashMap<>();
+	private final Map<InetAddress, TrackerConnection> trackersMap = new HashMap<>();
 	private final Map<Tracker, Consumer<String>> calibrationDataRequests = new HashMap<>();
 	private final Consumer<Tracker> trackersConsumer;
 	private final int port;
@@ -55,12 +56,13 @@ public class TrackersUDPServer extends Thread {
 	
 	private void setUpNewSensor(DatagramPacket handshakePacket, ByteBuffer data) throws IOException {
 		System.out.println("[TrackerServer] Handshake recieved from " + handshakePacket.getAddress() + ":" + handshakePacket.getPort());
-		SocketAddress addr = handshakePacket.getSocketAddress();
+		InetAddress addr = handshakePacket.getAddress();
 		TrackerConnection sensor;
 		synchronized(trackers) {
 			sensor = trackersMap.get(addr);
 		}
 		if(sensor == null) {
+			boolean isOwo = false;
 			data.getLong(); // Skip packet number
 			int boardType = -1;
 			int imuType = -1;
@@ -97,25 +99,28 @@ public class TrackersUDPServer extends Thread {
 					macString = String.format("%02X:%02X:%02X:%02X:%02X:%02X", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 				}
 			}
-			if(firmware.length() == 0)
+			if(firmware.length() == 0) {
 				firmware.append("owoTrack");
+				isOwo = true;
+			}
 			IMUTracker imu = new IMUTracker("udp:/" + handshakePacket.getAddress().toString(), this);
 			ReferenceAdjustedTracker<IMUTracker> adjustedTracker = new ReferenceAdjustedTracker<>(imu);
 			trackersConsumer.accept(adjustedTracker);
-			sensor = new TrackerConnection(imu, addr);
+			sensor = new TrackerConnection(imu, handshakePacket.getSocketAddress());
+			sensor.isOwoTrack = isOwo;
 			int i = 0;
 			synchronized(trackers) {
 				i = trackers.size();
 				trackers.add(sensor);
 				trackersMap.put(addr, sensor);
 			}
-			System.out.println("[TrackerServer] Sensor " + i + " added with address " + addr + ". Board type: " + boardType + ", imu type: " + imuType + ", firmware: " + firmware + " (" + firmwareBuild + "), mac: " + macString);
+			System.out.println("[TrackerServer] Sensor " + i + " added with address " + handshakePacket.getSocketAddress() + ". Board type: " + boardType + ", imu type: " + imuType + ", firmware: " + firmware + " (" + firmwareBuild + "), mac: " + macString);
 		}
 		sensor.tracker.setStatus(TrackerStatus.OK);
         socket.send(new DatagramPacket(HANDSHAKE_BUFFER, HANDSHAKE_BUFFER.length, handshakePacket.getAddress(), handshakePacket.getPort()));
 	}
 	
-	private void setUpAuxialrySensor(TrackerConnection connection) throws IOException {
+	private void setUpAuxilarySensor(TrackerConnection connection) throws IOException {
 		System.out.println("[TrackerServer] Setting up auxilary sensor for " + connection.tracker.getName());
 		IMUTracker imu = new IMUTracker(connection.tracker.getName() + "/1", this);
 		connection.secondTracker = imu;
@@ -142,7 +147,7 @@ public class TrackersUDPServer extends Thread {
 					TrackerConnection connection;
 					IMUTracker tracker = null;
 					synchronized(trackers) {
-						connection = trackersMap.get(recieve.getSocketAddress());
+						connection = trackersMap.get(recieve.getAddress());
 					}
 					if(connection != null)
 						connection.lastPacket = System.currentTimeMillis();
@@ -173,6 +178,8 @@ public class TrackersUDPServer extends Thread {
 					case 17: // PACKET_ROTATION_DATA
 						if(connection == null)
 							break;
+						if(connection.isOwoTrack)
+							break;
 						bb.getLong();
 						int sensorId = bb.get() & 0xFF;
 						if(sensorId == 0) {
@@ -204,6 +211,8 @@ public class TrackersUDPServer extends Thread {
 					case 18: // PACKET_MAGENTOMETER_ACCURACY
 						if(connection == null)
 							break;
+						if(connection.isOwoTrack)
+							break;
 						bb.getLong();
 						sensorId = bb.get() & 0xFF;
 						if(sensorId == 0) {
@@ -235,6 +244,8 @@ public class TrackersUDPServer extends Thread {
 					case 5:
 						if(connection == null)
 							break;
+						if(connection.isOwoTrack)
+							break;
 						bb.getLong();
 						x = bb.getFloat();
 						z = bb.getFloat();
@@ -244,18 +255,24 @@ public class TrackersUDPServer extends Thread {
 					case 6: // PACKET_RAW_CALIBRATION_DATA
 						if(connection == null)
 							break;
+						if(connection.isOwoTrack)
+							break;
 						bb.getLong();
 						//sensor.rawCalibrationData.add(new double[] {bb.getInt(), bb.getInt(), bb.getInt(), bb.getInt(), bb.getInt(), bb.getInt()});
 						break;
 					case 7: // PACKET_GYRO_CALIBRATION_DATA
 						if(connection == null)
 							break;
+						if(connection.isOwoTrack)
+							break;
 						bb.getLong();
 						//sensor.gyroCalibrationData = new double[] {bb.getFloat(), bb.getFloat(), bb.getFloat()};
 						break;
 					case 8: // PACKET_CONFIG
 						if(connection == null)
 							break;
+						if(connection.isOwoTrack)
+							break;
 						bb.getLong();
 						MPUTracker.ConfigurationData data = new MPUTracker.ConfigurationData(bb);
 						Consumer<String> dataConsumer = calibrationDataRequests.remove(connection.tracker);
@@ -266,6 +283,8 @@ public class TrackersUDPServer extends Thread {
 					case 9: // PACKET_RAW_MAGENTOMETER
 						if(connection == null)
 							break;
+						if(connection.isOwoTrack)
+							break;
 						bb.getLong();
 						float mx = bb.getFloat();
 						float my = bb.getFloat();
@@ -275,6 +294,8 @@ public class TrackersUDPServer extends Thread {
 					case 10: // PACKET_PING_PONG:
 						if(connection == null)
 							break;
+						if(connection.isOwoTrack)
+							break;
 						int pingId = bb.getInt();
 						if(connection.lastPingPacketId == pingId) {
 							tracker = connection.tracker;
@@ -284,6 +305,8 @@ public class TrackersUDPServer extends Thread {
 					case 11: // PACKET_SERIAL
 						if(connection == null)
 							break;
+						if(connection.isOwoTrack)
+							break;
 						tracker = connection.tracker;
 						bb.getLong();
 						int length = bb.getInt();
@@ -309,6 +332,8 @@ public class TrackersUDPServer extends Thread {
 					case 13: // PACKET_TAP
 						if(connection == null)
 							break;
+						if(connection.isOwoTrack)
+							break;
 						tracker = connection.tracker;
 						bb.getLong();
 						sensorId = bb.get() & 0xFF;
@@ -337,7 +362,7 @@ public class TrackersUDPServer extends Thread {
 						sensorId = bb.get() & 0xFF;
 						int sensorStatus = bb.get() & 0xFF;
 						if(sensorId == 1 && sensorStatus == 1 && connection.secondTracker == null) {
-							setUpAuxialrySensor(connection);
+							setUpAuxilarySensor(connection);
 						}
 						bb.rewind();
 						bb.putInt(15);
@@ -407,6 +432,7 @@ public class TrackersUDPServer extends Thread {
 		public long lastPacket = System.currentTimeMillis();
 		public int lastPingPacketId = -1;
 		public long lastPingPacketTime = 0;
+		public boolean isOwoTrack = false;
 		
 		public TrackerConnection(IMUTracker tracker, SocketAddress address) {
 			this.tracker = tracker;

src/test/java/io/eiren/unit/ReferenceAdjustmentsTests.java

@@ -67,7 +67,7 @@ public class ReferenceAdjustmentsTests {
 	
 	public void checkReferenceAdjustmentFull(Quaternion trackerQuat, int refPitch, int refYaw, int refRoll) {
 		Quaternion referenceQuat = q(refPitch, refYaw, refRoll);
-		ComputedTracker tracker = new ComputedTracker("test");
+		ComputedTracker tracker = new ComputedTracker("test", true, false);
 		tracker.rotation.set(trackerQuat);
 		ReferenceAdjustedTracker<ComputedTracker> adj = new ReferenceAdjustedTracker<>(tracker);
 		adj.resetFull(referenceQuat);
@@ -86,7 +86,7 @@ public class ReferenceAdjustmentsTests {
 	
 	public void checkReferenceAdjustmentYaw(Quaternion trackerQuat, int refPitch, int refYaw, int refRoll) {
 		Quaternion referenceQuat = q(refPitch, refYaw, refRoll);
-		ComputedTracker tracker = new ComputedTracker("test");
+		ComputedTracker tracker = new ComputedTracker("test", true, false);
 		tracker.rotation.set(trackerQuat);
 		ReferenceAdjustedTracker<ComputedTracker> adj = new ReferenceAdjustedTracker<>(tracker);
 		adj.resetYaw(referenceQuat);
@@ -98,7 +98,7 @@ public class ReferenceAdjustmentsTests {
 	
 	private void testAdjustedTrackerRotation(Quaternion trackerQuat, int refPitch, int refYaw, int refRoll) {
 		Quaternion referenceQuat = q(refPitch, refYaw, refRoll);
-		ComputedTracker tracker = new ComputedTracker("test");
+		ComputedTracker tracker = new ComputedTracker("test", true, false);
 		tracker.rotation.set(trackerQuat);
 		ReferenceAdjustedTracker<ComputedTracker> adj = new ReferenceAdjustedTracker<>(tracker);
 		adj.resetFull(referenceQuat);