Hi all, I''m REALLY a beginner in openGL, so please be patient... I''ve read NeHe''s lesson20 and I''ve tried to use that masking technique to create a "control panel" for an openGL application. In that app I use gluLookAt to move the camera around. Sequence of operations is: 1 set the view (gluLookAt) 2 draw the scene (a polygon, as in lesson 20) 3 draw the mask (code from lesson 20) I know that if I draw something after I''ve setted the camera, it''s position on the screen is no "absolute" but referred to the viewpoint. Result: I can fly around the mask when I move the view ! In lesson 20 that sequence of operation works because there isn''t a movement of the viewpoint... Someone can explian me how to do this ? Thanks.

check out the masking lesson on www.gametutorials.com i find it to be more worth than nehe''s , not that is not good. Anyways u have to donwload the source and inside it ou have the tutorial...

Metal Typhoon

Yeah !

That''s what I need !

Many thanks Metal Typhoon !