3D points projection to 2D XY plane

Question

I have a 3 Dimentional point set (x,y,z).I need to project these points into 2 dimentional XY plane using orthogonal projection. so my question is, how to convert these points into 2D? is it correct if I make Z=0 only? If it is not correct please any one help me to slove this problem. Also I want to programming this in C++

Answer 1

如果坐标系的轴彼此正交，只需将z坐标设置为零即可获得到xy平面的正交投影 - 你就是这样。