如何从旋转矩阵中删除轴? [英] How do I remove axis from a rotation matrix?

问题描述

我有一个 opengl 任意旋转矩阵，想删除 X &Y 轴，只剩下 Z 轴?

I have an opengl arbitrary rotation matrix and would like to remove the X & Y axis, leaving me with only the Z axis?

这可能吗?关于如何做到这一点的任何指示?

Is this possible? Any pointers on how to do it?

推荐答案

这里只是想了想，但是你不能用矩阵来旋转一个像 (1,0,0) 这样的向量，然后做 atan2(y,x) 看看它旋转了多少，然后构建一个新的矩阵来通过 Z 轴旋转多少?

Just thinking out loud here, but can't you use the matrix to rotate a vector like (1,0,0), then do atan2(y,x) to see how much it's rotated and then build a new matrix to rotate through the Z axis by that much?

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