I have my screen in Ortho mode but was curious of a few things . -Can I turn glOrtho off and put it back into ''3D'' mode and vice versa mid program? . -When I translate normally we translate in standard gl units, but if I set Ortho mode to glOrtho(0,width,height,0) and then translate glTranslatef(0.0f,1.0f,0.0f); does it translate in the normal units or in the pixel type untis I specified in glOrtho. Hope I make sense Any replies appreciated

When you call glOrtho you are setting the clipping volume. The coordinates you supply to it are the max x,y,z cartseian coordinate values. GlOrtho maps the amount of pixels to the coordinates ie 1 unit in the x axis could represent 2 pixels in the window it depends on the size of the window. I''m not sure if you could change the type of mode used during runtime as it''s crucial to the rendering. I may be wrong though I''m still a beginner my self.

Steve

Sure, you can change the different matrices as many times as you want. I suggest you look into glPushMatrix and glPopMatrix, they speed it up a little .

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