800x600

Graphics and GPU Programming Programming

Started by LessThanJoe May 02, 2002 06:44 AM

1 comment, last by LessThanJoe 21 years, 11 months ago

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May 02, 2002 06:44 AM

ok, this is what I think is a simple question...and I hope it is. How would I set it up so that when using glvertex3f I can put in 0, 0, -1 and get the top left of the screen, then put in 800, 600, -1 and get the bottom right. This would make getting some code I''ve written to work as it should far easier. Thanks in advance...

Null and Void

1,088

May 02, 2002 08:03 AM

This is asked a lot.

glViewport(0, 0, (GLsizei) ScreenWidth, (GLsizei) ScreenHeight);glMatrixMode(GL_PROJECTION);glLoadIdentity();glOrtho(0.0f,ScreenWidth,ScreenHeight,0.0f,Near,Far);glMatrixMode(GL_MODELVIEW);glLoadIdentity();

Just plug in -1.0f and 1.0f for near and far, respectively, if you don''t need to use the depth buffer.