1 /* idproj.c */
2
3
4 /*
5 * Setup an identity projection such that glVertex(x,y) maps to
6 * window coordinate (x,y).
7 *
8 * Written by Brian Paul and in the public domain.
9 */
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IdentityProjection(GLint x,GLint y,GLsizei width,GLsizei height)15 void IdentityProjection( GLint x, GLint y, GLsizei width, GLsizei height )
16 {
17 glViewport( x, y, width, height );
18 glMatrixMode( GL_PROJECTION );
19 glLoadIdentity();
20 glOrtho( (GLdouble) x, (GLdouble) y,
21 (GLdouble) width, (GLdouble) height,
22 -1.0, 1.0 );
23 glMatrixMode( GL_MODELVIEW );
24 glLoadIdentity();
25 }
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