25 lines
599 B
GLSL
25 lines
599 B
GLSL
uniform float scale;
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uniform float centerx;
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uniform float centery;
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uniform bool mirrorx;
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uniform bool mirrory;
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vec4 process(vec4 col) {
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float adj_scale = scale*0.01;
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vec2 scaled_coords = (v_texcoord/adj_scale);
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vec2 coord = scaled_coords-vec2(0.5/adj_scale, 0.5/adj_scale)+vec2(0.5, 0.5)+vec2(-centerx*0.01, -centery*0.01);
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vec2 modcoord = mod(coord, 1.0);
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if (mirrorx && mod(coord.x, 2.0) > 1.0) {
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modcoord.x = 1.0 - modcoord.x;
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}
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if (mirrory && mod(coord.y, 2.0) > 1.0) {
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modcoord.y = 1.0 - modcoord.y;
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}
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return vec4(texture2D(texture, modcoord));
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} |