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