43 lines
903 B
C
43 lines
903 B
C
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/* winpos.c */
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/*
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* Set the current raster position to a specific window
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* coordinate. Also see the GL_MESA_window_pos extension.
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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 WindowPos( GLfloat x, GLfloat y, GLfloat z )
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{
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GLfloat fx, fy;
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/* Push current matrix mode and viewport attributes */
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glPushAttrib( GL_TRANSFORM_BIT | GL_VIEWPORT_BIT );
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/* Setup projection parameters */
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glMatrixMode( GL_PROJECTION );
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glPushMatrix();
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glLoadIdentity();
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glMatrixMode( GL_MODELVIEW );
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glPushMatrix();
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glLoadIdentity();
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glDepthRange( z, z );
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glViewport( (int) x - 1, (int) y - 1, 2, 2 );
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/* set the raster (window) position */
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fx = x - (int) x;
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fy = y - (int) y;
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glRasterPos3f( fx, fy, 0.0 );
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/* restore matrices, viewport and matrix mode */
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glPopMatrix();
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glMatrixMode( GL_PROJECTION );
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glPopMatrix();
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glPopAttrib();
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}
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