add decoder for tracked point position submodule

src/decoders/motion/tracked-point-position.ts

@@ -0,0 +1,33 @@
+import { TrackedPointPosition } from '../../models';
+
+export default (bytes: Uint8Array, isLittleEndian: boolean = false): TrackedPointPosition => {
+  if (bytes.length !== 30) {
+    throw new Error('Tracked Point Position module must be 30 bytes');
+  }
+
+  const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
+
+  const type = view.getUint8(0);
+  if (type !== 0x06) {
+    throw new Error('Tracked Point Position module must have a type of 0x06');
+  }
+
+  const size = view.getUint16(1, isLittleEndian);
+  if (size !== 30) {
+    throw new Error('Tracked Point Position module must be 30 bytes');
+  }
+  const latency = view.getUint16(3, isLittleEndian);
+  const x = view.getFloat64(5, isLittleEndian);
+  const y = view.getFloat64(13, isLittleEndian);
+  const z = view.getFloat64(21, isLittleEndian);
+  const index = view.getUint8(29);
+  return {
+    type,
+    size,
+    latency,
+    x,
+    y,
+    z,
+    index,
+  };
+};