diff options
Diffstat (limited to 'progs/util/idproj.c')
-rw-r--r-- | progs/util/idproj.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/progs/util/idproj.c b/progs/util/idproj.c new file mode 100644 index 0000000..d5ee340 --- /dev/null +++ b/progs/util/idproj.c @@ -0,0 +1,26 @@ +/* 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(); +} + |