坐标转换 [英] Coordinates transformation

问题描述

我在空间中有两个3D对象，我想将点从一个对象复制到另一个.问题在于这些对象不共享公共坐标系，因此我必须进行坐标转换.我有两个对象的局部变换矩阵，也可以访问世界变换矩阵.我知道使用这些转换矩阵需要进行一些计算，但是我不知道该怎么做.

I have two 3D objects in space and i want to copy the points from one object to another. The problem is that these objects don't share a common coordinate system and i have to do coordinate transformations. I have the local transformation matrix for both objects and i have also access to the world transformation matrix. I know there's some calculations to be done using these transformation matrices but i don't know how.

如果将其复制到另一个对象(或其坐标系)中，如何变换第一个对象中的一个点，使其具有相同的位置(相对于世界坐标)?

How can i transform one point in the first object so that it has the same position(relative to the world coordinates) if i copy it in the other object( or its coordinate system )?

谢谢

推荐答案

好，您必须应用已有的转换运算符. 例如，极坐标(r，t)和笛卡尔坐标(x，y)之间的关系定义为:

Well, you have to apply the conversion operator that you have. E.g., the relation between polar (r, t) and cartesian (x, y) coordinates is defined by:

x = rcost
y = rsint

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