/* idproj.c */ | |
/* | |
* Setup an identity projection such that glVertex(x,y) maps to | |
* window coordinate (x,y). | |
* | |
* Written by Brian Paul and in the public domain. | |
*/ | |
void IdentityProjection( GLint x, GLint y, GLsizei width, GLsizei height ) | |
{ | |
glViewport( x, y, width, height ); | |
glMatrixMode( GL_PROJECTION ); | |
glLoadIdentity(); | |
glOrtho( (GLdouble) x, (GLdouble) y, | |
(GLdouble) width, (GLdouble) height, | |
-1.0, 1.0 ); | |
glMatrixMode( GL_MODELVIEW ); | |
glLoadIdentity(); | |
} | |