34 lines
1.1 KiB
GLSL
34 lines
1.1 KiB
GLSL
// MinecraftPT — RTWSM Collapse Importance
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// Collapses the 2D importance map into a 1D cumulative curve per row.
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#include "/Lib/Settings.glsl"
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#include "/Lib/Utilities.glsl"
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const ivec3 workGroups = ivec3(RTW_RESOLUTION, 1, 1);
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layout (local_size_x = 1) in;
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layout (r32f) uniform writeonly image2D img_rtwImportance2D;
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layout (rg16) uniform writeonly image2D img_rtwWarp1D;
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uniform sampler2D rtwImportance2D;
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void main(){
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int y = int(gl_GlobalInvocationID.y);
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// Sum importance across rows -> 1D profile
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float sum = 0.0;
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for (int x = 0; x < RTW_RESOLUTION; x++){
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sum += textureLod(rtwImportance2D, vec2(float(x) / float(RTW_RESOLUTION), float(y) / float(RTW_RESOLUTION_Y)), 0.0).r;
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}
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// Build cumulative distribution
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float cumulative = 0.0;
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for (int x = 0; x < RTW_RESOLUTION; x++){
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float imp = textureLod(rtwImportance2D, vec2(float(x) / float(RTW_RESOLUTION), float(y) / float(RTW_RESOLUTION_Y)), 0.0).r;
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cumulative += imp;
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float normalized = sum > 0.0 ? cumulative / sum : float(x) / float(RTW_RESOLUTION);
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imageStore(img_rtwWarp1D, ivec2(x, y), vec4(normalized, 1.0 - normalized, 0.0, 0.0));
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}
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}
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