如何从一个旋转矩阵取出轴？ [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，并想除去X'放大器; Y轴，留下我只有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？如何做到这一点的任何指针？

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

推荐答案

只是想大声在这里，但你不能使用矩阵旋转状（1,0,0）的向量，然后做ATAN2（Y， x）的，看看有多少它的旋转，然后建立一个新的矩阵由很多通过Z轴旋转？

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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