Android 利用world创建一个旋转关节,创建一个旋转关节的数据实例，初始化旋转关节数据，马达的预期最大扭矩，马达最终扭矩，启动马达-Android use world to create a rotating joint, creating a data instance rotating joints, rotary joints initialization data expected maximum torque of the motor, the motor end torque