Initial commit: Minecraft 光追着色器包（从零实现的 path tracing）

shaders/Lib/Programs/Composite/DiffuseVariance_FS.glsl

@@ -0,0 +1,14 @@
+// MinecraftPT — DiffuseVariance_FS
+#include "/Lib/Settings.glsl"
+#include "/Lib/Utilities.glsl"
+#include "/Lib/PathTracing/Denoiser/DiffuseVarianceEstimation.glsl"
+
+layout(location = 0) out vec4 varOut;
+
+void main(){
+	vec2 texelCoord = gl_FragCoord.xy;
+	vec3 color = texelFetch(colortex7, ivec2(texelCoord), 0).rgb;
+	vec2 variance = DiffuseEstimateVariance(color, texelCoord);
+
+	varOut = vec4(variance, 0.0, 1.0);
+}