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17 lines
439 B
C
17 lines
439 B
C
#ifndef IMAGE_FLIP
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#define IMAGE_FLIP
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// wraps the Position in gl_Position calculation
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#pragma parameter ia_FLIP_HORZ "Flip Horiz Axis" 0.0 0.0 1.0 1.0
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#pragma parameter ia_FLIP_VERT "Flip Vert Axis" 0.0 0.0 1.0 1.0
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vec4 flip_pos(vec4 in_pos){
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vec4 out_pos = in_pos;
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out_pos.x = (ia_FLIP_HORZ < 0.5) ? out_pos.x : 1.0 - out_pos.x;
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out_pos.y = (ia_FLIP_VERT < 0.5) ? out_pos.y : 1.0 - out_pos.y;
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return out_pos;
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}
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#endif
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