A problem of Implementation

I’d like to ask a question about 3D render implementation.

All vertexes multiply the transformation matrix. Then, can i immidiatly multiply the projection matrix(if no lighting and color calculation) wheather the vertexes are not all in the near and far regine?

or, i need to clip first the multiply the projection matrix?



You must perform the clipping operation in camera space, before the projecting them.


Thank you
But, how about remesh?
Is still done before projection?