Add Positional UDP packet (#1546)

Author: SummerSigh

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

@@ -328,6 +328,7 @@ class Tracker @JvmOverloads constructor(
 
 	/**
 	 * Tells the tracker that it received new data
+	 * NOTE: Use only when rotation is received
 	 */
 	fun dataTick() {
 		timer.update()

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

@@ -576,6 +576,13 @@ class TrackersUDPServer(private val port: Int, name: String, private val tracker
 				tracker.dataTick()
 			}
 
+			is UDPPacket27Position -> {
+				tracker = connection?.getTracker(packet.sensorId)
+				if (tracker == null) return
+				tracker.position = packet.position
+				// dont call dataTick here as this is just position update
+			}
+
 			is UDPPacket200ProtocolChange -> {}
 		}
 	}

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

@@ -396,6 +396,20 @@ data class UDPPacket26FlexData(
 	}
 }
 
+data class UDPPacket27Position(
+	var position: Vector3 = Vector3.NULL,
+) : UDPPacket(27),
+	SensorSpecificPacket {
+	override var sensorId = 0
+	override fun readData(buf: ByteBuffer) {
+		sensorId = buf.get().toInt() and 0xFF
+		val x = UDPUtils.getSafeBufferFloat(buf)
+		val y = UDPUtils.getSafeBufferFloat(buf)
+		val z = UDPUtils.getSafeBufferFloat(buf)
+		position = Vector3(x, y, z)
+	}
+}
+
 data class UDPPacket200ProtocolChange(
 	var targetProtocol: Int = 0,
 	var targetProtocolVersion: Int = 0,

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

@@ -116,6 +116,7 @@ class UDPProtocolParser {
 		PACKET_FEATURE_FLAGS -> UDPPacket22FeatureFlags()
 		PACKET_ACK_CONFIG_CHANGE -> UDPPacket24AckConfigChange()
 		PACKET_FLEX_DATA -> UDPPacket26FlexData()
+		PACKET_POSITION -> UDPPacket27Position()
 		PACKET_PROTOCOL_CHANGE -> UDPPacket200ProtocolChange()
 		else -> null
 	}
@@ -152,6 +153,7 @@ class UDPProtocolParser {
 		const val PACKET_ACK_CONFIG_CHANGE = 24
 		const val PACKET_SET_CONFIG_FLAG = 25
 		const val PACKET_FLEX_DATA = 26
+		const val PACKET_POSITION = 27
 		const val PACKET_BUNDLE = 100
 		const val PACKET_BUNDLE_COMPACT = 101
 		const val PACKET_PROTOCOL_CHANGE = 200