112 lines
3.1 KiB
GLSL
112 lines
3.1 KiB
GLSL
#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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uniform sampler2D aomap;
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uniform sampler2D gmap;
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uniform vec2 dir;
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in vec2 texCoord;
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vec3 normalFromDepth(float depth, vec2 texcoords) {
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const vec2 offset1 = vec2(0.0, 0.001);
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const vec2 offset2 = vec2(0.001, 0.0);
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float depth1 = (texture(gmap, texcoords + offset1).r - 0.5) * 2.0;
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float depth2 = (texture(gmap, texcoords + offset2).r - 0.5) * 2.0;
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vec3 p1 = vec3(offset1, depth1 - depth);
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vec3 p2 = vec3(offset2, depth2 - depth);
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vec3 normal = cross(p1, p2);
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normal.z = -normal.z;
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return normalize(normal);
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}
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void main() {
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float weights[9];
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weights[0] = 0.013519569015984728;
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weights[1] = 0.047662179108871855;
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weights[2] = 0.11723004402070096;
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weights[3] = 0.20116755999375591;
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weights[4] = 0.240841295721373;
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weights[5] = 0.20116755999375591;
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weights[6] = 0.11723004402070096;
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weights[7] = 0.047662179108871855;
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weights[8] = 0.013519569015984728;
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float indices[9];
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indices[0] = -4;
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indices[1] = -3;
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indices[2] = -2;
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indices[3] = -1;
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indices[4] = 0;
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indices[5] = 1;
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indices[6] = 2;
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indices[7] = 3;
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indices[8] = 4;
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vec2 step = dir / vec2(1136.0, 640.0); //g_resolution.xy;
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vec3 normal[9];
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float depth = (texture(gmap, texCoord + indices[0]*step).r - 0.5) * 2.0;
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normal[0] = normalFromDepth(depth, texCoord);
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depth = (texture(gmap, texCoord + indices[1]*step).r - 0.5) * 2.0;
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normal[1] = normalFromDepth(depth, texCoord);
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depth = (texture(gmap, texCoord + indices[2]*step).r - 0.5) * 2.0;
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normal[2] = normalFromDepth(depth, texCoord);
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depth = (texture(gmap, texCoord + indices[3]*step).r - 0.5) * 2.0;
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normal[3] = normalFromDepth(depth, texCoord);
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depth = (texture(gmap, texCoord + indices[4]*step).r - 0.5) * 2.0;
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normal[4] = normalFromDepth(depth, texCoord);
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depth = (texture(gmap, texCoord + indices[5]*step).r - 0.5) * 2.0;
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normal[5] = normalFromDepth(depth, texCoord);
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depth = (texture(gmap, texCoord + indices[6]*step).r - 0.5) * 2.0;
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normal[6] = normalFromDepth(depth, texCoord);
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depth = (texture(gmap, texCoord + indices[7]*step).r - 0.5) * 2.0;
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normal[7] = normalFromDepth(depth, texCoord);
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depth = (texture(gmap, texCoord + indices[8]*step).r - 0.5) * 2.0;
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normal[8] = normalFromDepth(depth, texCoord);
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// normal[0] = texture(gmap, texCoord + indices[0]*step).r;
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// normal[1] = texture(gmap, texCoord + indices[1]*step).r;
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// normal[2] = texture(gmap, texCoord + indices[2]*step).r;
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// normal[3] = texture(gmap, texCoord + indices[3]*step).r;
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// normal[4] = texture(gmap, texCoord + indices[4]*step).r;
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// normal[5] = texture(gmap, texCoord + indices[5]*step).r;
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// normal[6] = texture(gmap, texCoord + indices[6]*step).r;
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// normal[7] = texture(gmap, texCoord + indices[7]*step).r;
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// normal[8] = texture(gmap, texCoord + indices[8]*step).r;
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float total_weight = 1.0;
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float discard_threshold = 0.85;
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int i;
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for(i = 0; i < 9; ++i) {
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if (dot(normal[i], normal[4]) < discard_threshold) {
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total_weight -= weights[i];
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weights[i] = 0;
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}
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}
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float res = 0.0;
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for (i = 0; i < 9; ++i) {
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res += texture(aomap, texCoord + indices[i]*step).r * weights[i];
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}
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res /= total_weight;
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gl_FragColor = vec4(vec3(res), 1.0);
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}
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