Raster Position question...

Graphics and GPU Programming Programming

Started by RegularKid February 17, 2002 09:46 PM

0 comments, last by RegularKid 22 years, 2 months ago

139

Author

February 17, 2002 09:46 PM

I am using perspective mode ( gluPerspective(90.0f, (float)width / (float)height, 0.1f, 100.0f); ). So when I want to display a 2D image without using perspective (ie. for menus, score bar, etc) I have to use glRasterPos2f() . However I can''t seem to get an exact screen position. How do I set the raster position to an exact screen coordinate in 2D such as (400, 50) or (0, 0) etc? Thanks.

Fruny

1,658

February 17, 2002 11:00 PM

The Projection matrix stack can usually support 2 matrices, so you can do

... whatever projection
glMatrixMode( GL_PROJECTION );
glPushMatrix();
glLoadIdentity();
glRasterPos*( whatever );
glPopMatrix();

"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." — Brian W. Kernighan