Hello!
Im new on 3D,
if i have an example, maybe an GL_QUAD on 3D viewport on monitor screen,
how do i get to know, before/after the screen update what the QL_QUADs coordinates on screen are ??
where i can read these,
HELP !!
//----
thanks…
- Read the modelview matrix and the projection matrix from the GPU, where you have your glBegin.
- Feed the coordinates through the projection matrix and the modelview matrix
- Multiply resulting X,Y by viewport dimensions
A howto for each step is available on Google! 