36 lines
781 B
GLSL
36 lines
781 B
GLSL
// Weighted blended OIT by McGuire and Bavoil
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#version 450
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// uniform sampler2D gbufferD;
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uniform sampler2D gbuffer0; // saccum
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uniform sampler2D gbuffer1; // srevealage
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uniform vec2 texSize;
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in vec2 texCoord;
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out vec4 fragColor;
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float maxComponent(vec4 v) {
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return max(max(max(v.x, v.y), v.z), v.w);
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}
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void main() {
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vec4 accum = texelFetch(gbuffer0, ivec2(texCoord * texSize), 0);
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float revealage = 1.0 - accum.a;
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// Save the blending and color texture fetch cost
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if (revealage >= 1.0) {
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// discard;
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fragColor = vec4(accum.rgb, 1.0);
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return;
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}
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if (isinf(maxComponent(abs(accum)))) {
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accum.rgb = vec3(revealage);
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}
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float f = texelFetch(gbuffer1, ivec2(texCoord * texSize), 0).r;
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fragColor = vec4(accum.rgb / clamp(f, 1e-4, 5e4), revealage);
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}
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