mirror of
https://github.com/tanema/light_world.lua.git
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13 lines
530 B
GLSL
13 lines
530 B
GLSL
extern vec2 screen = vec2(800.0, 600.0);
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extern float steps = 2.0;
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vec4 effect(vec4 color, Image texture, vec2 texture_coords, vec2 pixel_coords) {
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vec2 pSize = vec2(1.0 / screen.x, 1.0 / screen.y);
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vec4 col = Texel(texture, texture_coords);
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for(int i = 1; i <= steps; i++) {
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col = col + Texel(texture, vec2(texture_coords.x, texture_coords.y - pSize.y * i));
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col = col + Texel(texture, vec2(texture_coords.x, texture_coords.y + pSize.y * i));
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}
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col = col / (steps * 2.0 + 1.0);
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return vec4(col.r, col.g, col.b, 1.0);
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} |