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现在问题只剩下怎么确定射出点的纹理坐标。
Now, the only problem left is to determine the texture coordinates at the exit point.
youdao
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如何确定2坐标系之间的方向？
How to determine direction between 2 coordinates?
youdao
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如何确定2坐标系之间的方向？
How to determine direction between 2 coordinates?
youdao