Added a button to switch between 3 and 1 vive trackers mode

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

@@ -6,6 +6,7 @@
 
 import io.eiren.util.ann.AWTThread;
 import io.eiren.vr.VRServer;
+import io.eiren.vr.bridge.NamedPipeVRBridge;
 
 import java.awt.event.MouseEvent;
 import java.util.TimerTask;
@@ -57,8 +58,12 @@ public void run() {
 	private void build() {
 		pane.removeAll();
 
+		NamedPipeVRBridge npvb = server.getVRBridge(NamedPipeVRBridge.class);
+
 		pane.add(new EJBox(LINE_AXIS) {{
 			setBorder(new EmptyBorder(i(5)));
+
+			add(Box.createHorizontalGlue());
 			add(resetButton = new JButton("RESET") {{
 				addMouseListener(new MouseInputAdapter() {
 					@Override
@@ -67,6 +72,19 @@ public void mouseClicked(MouseEvent e) {
 					}
 				});
 			}});
+			add(Box.createHorizontalGlue());
+			if(npvb != null) {
+				add(new JButton(npvb.isOneTrackerMode() ? "1" : "3") {{
+					addMouseListener(new MouseInputAdapter() {
+						@Override
+						public void mouseClicked(MouseEvent e) {
+							npvb.setSpawnOneTracker(!npvb.isOneTrackerMode());
+							setText(npvb.isOneTrackerMode() ? "1" : "3");
+						}
+					});
+				}});
+				add(Box.createHorizontalStrut(10));
+			}
 		}});
 
 		pane.add(new EJBox(LINE_AXIS) {{

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

@@ -46,14 +46,15 @@ public class VRServer extends Thread {
 
 	public VRServer() {
 		super("VRServer");
+		loadConfig();
 		hmdTracker = new HMDTracker("HMD");
 		hmdTracker.position.set(0, 1.8f, 0); // Set starting position for easier debugging
 		// TODO Multiple processors
 		humanPoseProcessor = new HumanPoseProcessor(this, hmdTracker);
 		List<? extends Tracker> shareTrackers = humanPoseProcessor.getComputedTrackers();
 
 		// Create named pipe bridge for SteamVR driver
-		NamedPipeVRBridge driverBridge = new NamedPipeVRBridge(hmdTracker, shareTrackers);
+		NamedPipeVRBridge driverBridge = new NamedPipeVRBridge(hmdTracker, shareTrackers, this);
 		tasks.add(() -> driverBridge.start());
 		bridges.add(driverBridge);
 
@@ -71,6 +72,16 @@ public VRServer() {
 		for(int i = 0; i < shareTrackers.size(); ++i)
 			registerTracker(shareTrackers.get(i));
 	}
+
+	@ThreadSafe
+	public <E extends VRBridge> E getVRBridge(Class<E> cls) {
+		for(int i = 0; i < bridges.size(); ++i) {
+			VRBridge b = bridges.get(i);
+			if(cls.isInstance(b))
+				return cls.cast(b);
+		}
+		return null;
+	}
 
 	@ThreadSafe
 	public TrackerConfig getTrackerConfig(Tracker tracker) {
@@ -169,7 +180,6 @@ public void saveConfig() {
 	@Override
 	@VRServerThread
 	public void run() {
-		loadConfig();
 		trackersServer.start();
 		while(true) {
 			//final long start = System.currentTimeMillis();

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

@@ -14,6 +14,7 @@
 
 import io.eiren.util.collections.FastList;
 import io.eiren.util.logging.LogManager;
+import io.eiren.vr.VRServer;
 import io.eiren.vr.trackers.ComputedTracker;
 import io.eiren.vr.trackers.HMDTracker;
 import io.eiren.vr.trackers.Tracker;
@@ -32,6 +33,7 @@ public class NamedPipeVRBridge extends Thread implements VRBridge {
 	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;
@@ -41,8 +43,11 @@ public class NamedPipeVRBridge extends Thread implements VRBridge {
 	private final HMDTracker internalHMDTracker = new HMDTracker("itnernal://HMD");
 	private final AtomicBoolean newHMDData = new AtomicBoolean(false);
 
-	public NamedPipeVRBridge(HMDTracker hmd, List<? extends Tracker> shareTrackers) {
+	private boolean spawnOneTracker = false;
+
+	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());
@@ -53,6 +58,26 @@ public NamedPipeVRBridge(HMDTracker hmd, List<? extends Tracker> shareTrackers)
 			ct.setStatus(TrackerStatus.OK);
 			this.internalTrackers.add(ct);
 		}
+		this.spawnOneTracker = server.config.getBoolean("openvr.onetracker", spawnOneTracker);
+	}
+
+	public boolean isOneTrackerMode() {
+		return this.spawnOneTracker;
+	}
+
+	/**
+	 * Makes OpenVR bridge spawn only 1 tracker instead of 3, for
+	 * use with only waist/chest tracking. Requires restart.
+	 */
+	public void setSpawnOneTracker(boolean spawnOneTracker) {
+		if(spawnOneTracker == this.spawnOneTracker)
+			return;
+		this.spawnOneTracker = spawnOneTracker;
+		if(this.spawnOneTracker)
+			this.server.config.setProperty("openvr.onetracker", true);
+		else
+			this.server.config.removeProperty("openvr.onetracker");
+		this.server.saveConfig();
 	}
 
 	@Override
@@ -108,6 +133,8 @@ private void waitForPipesToOpen() {
 				if(tryOpeningPipe(trackerPipe))
 					initTrackerPipe(trackerPipe, i);
 			}
+			if(spawnOneTracker)
+				return;
 		}
 	}
 
@@ -167,7 +194,7 @@ private void initHMDPipe(Pipe pipe) {
 	}
 
 	private void initTrackerPipe(Pipe pipe, int trackerId) {
-		String trackerHello = this.shareTrackers.size() + " 0";
+		String trackerHello = (spawnOneTracker ? "1" : this.shareTrackers.size()) + " 0";
 		System.arraycopy(trackerHello.getBytes(ASCII), 0, buffer, 0, trackerHello.length());
 		buffer[trackerHello.length()] = '\0';
 		IntByReference lpNumberOfBytesWritten = new IntByReference(0);