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View Full Version : When building a pick ray through GluUnproject...



resle
03-14-2011, 11:08 PM
I don't know if it's correct to ask about GLU on the OpenGL boards... anyway:

GluUnproject takes two input matrices: modelview, and projection.
No problems with the projection matrix, some doubts on modelview.

I currently have a camera matrix, and a various matrix for the several objects I am rendering.

When using gluunproject to build a picking ray, what should I use ad modelviewmatrix? The one which derives from camera matrix only (thus, camera matrix itself), or the product of camera matrix and the single object I am going to test againist?

Thanks in advance,

andrea