93 lines
2.7 KiB
GLSL
93 lines
2.7 KiB
GLSL
// Exclusive to SSAO for now
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#version 450
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#ifdef GL_ES
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precision mediump float;
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#endif
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#include "../compiled.glsl"
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uniform sampler2D tex;
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uniform sampler2D gbuffer0;
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uniform vec2 dir;
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uniform vec2 screenSize;
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in vec2 texCoord;
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out vec4 fragColor;
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const float blurWeights[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 discardThreshold = 0.95;
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// const float discardThreshold = 0.70;
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vec3 result = vec3(0.0);
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vec2 octahedronWrap(vec2 v) {
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return (1.0 - abs(v.yx)) * (vec2(v.x >= 0.0 ? 1.0 : -1.0, v.y >= 0.0 ? 1.0 : -1.0));
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}
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vec3 getNor(vec2 enc) {
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vec3 n;
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n.z = 1.0 - abs(enc.x) - abs(enc.y);
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n.xy = n.z >= 0.0 ? enc.xy : octahedronWrap(enc.xy);
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n = normalize(n);
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return n;
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}
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float doBlur(float blurWeight, int pos, vec3 nor, vec2 texCoord) {
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vec2 texstep = dir / screenSize;
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vec3 nor2 = getNor(texture(gbuffer0, texCoord + pos * texstep).rg);
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float influenceFactor = step(discardThreshold, dot(nor2, nor));
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vec3 col = texture(tex, texCoord + (pos + 0.5) * texstep).rgb;
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result += col * blurWeight * influenceFactor;
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float weight = blurWeight * influenceFactor;
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nor2 = getNor(texture(gbuffer0, texCoord - pos * texstep).rg);
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influenceFactor = step(discardThreshold, dot(nor2, nor));
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col = texture(tex, texCoord - (pos + 0.5) * texstep).rgb;
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result += col * blurWeight * influenceFactor;
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weight += blurWeight * influenceFactor;
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return weight;
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}
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void main() {
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vec2 tc = texCoord * ssaoTextureScale;
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// vec2 step = dir / screenSize;
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// vec3 result = texture(tex, tc + (step * 4.5)).rgb;
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// result += texture(tex, tc + (step * 3.5)).rgb;
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// result += texture(tex, tc + (step * 2.5)).rgb;
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// result += texture(tex, tc + step * 1.5).rgb;
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// result += texture(tex, tc).rgb;
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// result += texture(tex, tc - step * 1.5).rgb;
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// result += texture(tex, tc - (step * 2.5)).rgb;
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// result += texture(tex, tc - (step * 3.5)).rgb;
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// result += texture(tex, tc - (step * 4.5)).rgb;
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// result /= vec3(9.0);
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// fragColor.rgb = vec3(result);
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vec3 nor = getNor(texture(gbuffer0, texCoord).rg);
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// for (int i = 0; i < 9; i++) {
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vec3 col = texture(tex, tc).rgb;
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result += col * blurWeights[0];
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float weight = blurWeights[0];
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weight += doBlur(blurWeights[1], 1, nor, tc);
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weight += doBlur(blurWeights[2], 2, nor, tc);
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weight += doBlur(blurWeights[3], 3, nor, tc);
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weight += doBlur(blurWeights[4], 4, nor, tc);
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weight += doBlur(blurWeights[5], 5, nor, tc);
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weight += doBlur(blurWeights[6], 6, nor, tc);
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weight += doBlur(blurWeights[7], 7, nor, tc);
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weight += doBlur(blurWeights[8], 8, nor, tc);
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weight += doBlur(blurWeights[9], 9, nor, tc);
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// }
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result /= weight;
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// fragColor = vec4(result.rgb, 1.0);
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fragColor = vec4(result.rrr, 1.0); // SSAO only
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}
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