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24 lines
711 B
C
24 lines
711 B
C
#ifndef CROP_ZOOM_PAN
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#define CROP_ZOOM_PAN
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// wraps the standard TexCoord
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#pragma parameter ia_overscan_percent_x "Stretch Width" 0.0 -25.0 25.0 1.0
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#pragma parameter ia_overscan_percent_y "Stretch Height" 0.0 -25.0 25.0 1.0
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#pragma parameter ia_ZOOM "Zoom In/Out" 1.0 0.0 4.0 0.01
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#pragma parameter ia_XPOS "Pan X" 0.0 -2.0 2.0 0.005
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#pragma parameter ia_YPOS "Pan Y" 0.0 -2.0 2.0 0.005
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const vec2 shift = vec2(0.5);
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vec2 crop_zoom_pan(vec2 in_coord){
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vec2 out_coord = in_coord - shift;
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out_coord /= ia_ZOOM;
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out_coord *= vec2(1.0 - ia_overscan_percent_x / 100.0, 1.0 - ia_overscan_percent_y / 100.0);
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out_coord += shift;
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out_coord += vec2(ia_XPOS, ia_YPOS);
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return out_coord;
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}
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#endif
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