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我想问问其中的原理 #12

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StromanStroman opened this issue Jun 4, 2021 · 0 comments
Open

我想问问其中的原理 #12

StromanStroman opened this issue Jun 4, 2021 · 0 comments

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@StromanStroman
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1、平移手势在屏幕上滑动产生的是一个XOY平面向量，然后这个向量被传入到旋转点的矩阵算法中。我想知道其中涉及到的正余弦的计算与传入的向量是什么关系？用的是什么原理。
2、用矩阵旋转点坐标的算法中，你用的是什么坐标系？
3、DBSphereView.m中39行3 - sqrt(5)代表的是什么意义？
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@StromanStroman