feat: add child motion picture book stage tooling

src/services/useMocapInput.test.ts

@@ -78,4 +78,47 @@ describe('parseMocapPacket', () => {
       expect.objectContaining({x: 0.9, y: 0.8, source: 'direct'}),
     );
   });
+
+  test('解析 mocap frame 的身体中心和左右手来源', () => {
+    const command = parseMocapPacket({
+      schema_version: '1.0',
+      stream: { type: 'mocap.frame' },
+      general: {
+        body: {
+          center_norm: [0.34, 0.58],
+        },
+      },
+      actions: [{ gesture: 'wave-left-hand' }],
+      hands: [
+        {
+          label: 'Left',
+          state: 'open_palm',
+          landmarks: [
+            { name: 'wrist', x: 0.21, y: 0.31 },
+            { name: 'index_mcp', x: 0.25, y: 0.33 },
+            { name: 'middle_mcp', x: 0.27, y: 0.34 },
+            { name: 'ring_mcp', x: 0.28, y: 0.35 },
+            { name: 'pinky_mcp', x: 0.29, y: 0.36 },
+          ],
+        },
+        {
+          label: 'Right',
+          state: 'unknown',
+          x: 0.72,
+          y: 0.32,
+        },
+      ],
+    });
+
+    expect(command.bodyCenter).toEqual({x: 0.34, y: 0.58});
+    expect(command.actions).toEqual(
+      expect.arrayContaining(['wave_left_hand', 'open_palm']),
+    );
+    expect(command.leftHand).toEqual(
+      expect.objectContaining({side: 'left', source: 'palm_center'}),
+    );
+    expect(command.rightHand).toEqual(
+      expect.objectContaining({x: 0.72, y: 0.32, side: 'right'}),
+    );
+  });
 });