luboslenco
40 lines
1.2 KiB
GLSL
40 lines
1.2 KiB
GLSL
#version 450
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#include "std/gbuffer.glsl"
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uniform sampler2D tex;
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uniform sampler2D gbuffer0;
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uniform vec2 dir_inv;
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in vec2 tex_coord;
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out float frag_color;
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const float blur_weights[10] = float[] (0.132572, 0.125472, 0.106373, 0.08078, 0.05495, 0.033482, 0.018275, 0.008934, 0.003912, 0.001535);
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const float discard_threshold = 0.95;
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void main() {
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vec3 nor = get_nor(textureLod(gbuffer0, tex_coord, 0.0).rg);
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frag_color = textureLod(tex, tex_coord, 0.0).r * blur_weights[0];
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float weight = blur_weights[0];
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for (int i = 1; i < 8; ++i) {
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float posadd = i;
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vec3 nor2 = get_nor(textureLod(gbuffer0, tex_coord + i * dir_inv, 0.0).rg);
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float influence_factor = step(discard_threshold, dot(nor2, nor));
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float col = textureLod(tex, tex_coord + posadd * dir_inv, 0.0).r;
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float w = blur_weights[i] * influence_factor;
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frag_color += col * w;
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weight += w;
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nor2 = get_nor(textureLod(gbuffer0, tex_coord - i * dir_inv, 0.0).rg);
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influence_factor = step(discard_threshold, dot(nor2, nor));
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col = textureLod(tex, tex_coord - posadd * dir_inv, 0.0).r;
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w = blur_weights[i] * influence_factor;
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frag_color += col * w;
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weight += w;
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}
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frag_color = frag_color / weight;
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} |