Add accelDataTick

Author: ButterscotchV

server/core/src/main/java/dev/slimevr/tracking/trackers/Tracker.kt

@@ -176,6 +176,10 @@ class Tracker @JvmOverloads constructor(
 	val stayAligned = StayAlignedTrackerState(this)
 	val yawResetSmoothing = InterpolationHandler()
 
+	// Currently only used for accel resets, to add anything else, consider using a
+	//  subscribable event listener instead
+	var accelTickCallback: ((tracker: Tracker) -> Unit)? = null
+
 	init {
 		// IMPORTANT: Look here for the required states of inputs
 		require(!allowReset || (hasRotation && allowReset)) {
@@ -485,6 +489,13 @@ class Tracker @JvmOverloads constructor(
 		}
 	}
 
+	/**
+	 * Tells the tracker that it received new accel data
+	 * Accel may be (and usually is) desynced from rotation data, so if we want the
+	 * latest, we need to process it here
+	 */
+	fun accelDataTick() = accelTickCallback?.invoke(this)
+
 	/**
 	 * A way to delay the timeout of the tracker
 	 */

server/core/src/main/java/dev/slimevr/tracking/trackers/hid/HIDCommon.kt

@@ -364,6 +364,9 @@ class HIDCommon {
 			if (packetType == 1 || packetType == 2 || packetType == 4 || packetType == 7) {
 				tracker.dataTick() // only data tick if there is rotation data
 			}
+			if (packetType == 1 || packetType == 2 || packetType == 7) {
+				tracker.accelDataTick()
+			}
 		}
 	}
 }

server/core/src/main/java/dev/slimevr/tracking/trackers/udp/TrackersUDPServer.kt

@@ -418,6 +418,7 @@ class TrackersUDPServer(private val port: Int, name: String, private val tracker
 					// If sensorOffset was applied to accel correctly, the axes will already
 					//  be correct for SlimeVR
 					tracker.setAcceleration(SENSOR_OFFSET_CORRECTION.sandwich(packet.acceleration))
+					tracker.accelDataTick()
 				}
 				tracker.dataTick()
 			}
@@ -452,6 +453,7 @@ class TrackersUDPServer(private val port: Int, name: String, private val tracker
 				// If sensorOffset was applied to accel correctly, the axes will already
 				//  be correct for SlimeVR
 				tracker.setAcceleration(SENSOR_OFFSET_CORRECTION.sandwich(packet.acceleration))
+				tracker.accelDataTick()
 			}
 
 			is UDPPacket10PingPong -> {