虽然它是一个虚拟的阴影，但它是实际的太阳轨迹，所以你可以看到它的运动。

It is a virtual shadow, but it is the actual sunpath, so you can see its movement.

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本文以四元数、递归动力学和优化控制为基础，提出了一种基于力矩优化的虚拟人运动控制算法。

This paper presents a motion control algorithm for virtual human based on torque optimization. The algorithm is founded on the use of quaternion, recursive dynamics and optimal control.

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本文对从人手到虚拟手的运动映射技术进行了详细的探讨。

This paper focuses on the technology of motion mapping between human hand and virtual hand.

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