mirror of https://github.com/OpenRCT2/OpenRCT2.git
42 lines
795 B
GLSL
42 lines
795 B
GLSL
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#version 330
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uniform ivec2 uScreenSize;
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uniform ivec4 uBounds;
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in int vIndex;
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out vec2 fPosition;
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out vec2 fTextureCoordinate;
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void main()
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{
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vec2 pos;
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switch (vIndex) {
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case 0:
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pos = uBounds.xy;
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fTextureCoordinate = vec2(0, 0);
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break;
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case 1:
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pos = uBounds.zy;
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fTextureCoordinate = vec2(1, 0);
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break;
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case 2:
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pos = uBounds.zw;
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fTextureCoordinate = vec2(1, 1);
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break;
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case 3:
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pos = uBounds.xw;
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fTextureCoordinate = vec2(0, 1);
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break;
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}
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fPosition = pos;
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// Transform screen coordinates to viewport
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pos.x = (pos.x * (2.0 / uScreenSize.x)) - 1.0;
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pos.y = (pos.y * (2.0 / uScreenSize.y)) - 1.0;
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pos.y *= -1;
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gl_Position = vec4(pos, 0.0, 1.0);
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}
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