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

shaders/Lib/BasicFunctions/TemporalNoise.glsl

@@ -0,0 +1,29 @@
+// MinecraftPT — Temporal Noise
+// Blue noise sampling with temporal interleaving, used for dithering and ray offsets.
+
+#ifndef TEMPORAL_NOISE_GLSL
+#define TEMPORAL_NOISE_GLSL
+
+float BlueNoiseTemporal(){
+	vec2 coord = (gl_FragCoord.xy + 0.5) / screenSize;
+	coord = fract(coord * vec2(128.0, 128.0) + 0.5);
+	vec2 texel = coord * vec2(127.0 / 128.0) + vec2(0.5 / 128.0);
+	float noise = textureLod(noisetex, texel, 0.0).r;
+	return fract(noise + frameCounter * 0.03125);
+}
+
+vec2 BlueNoiseTemporal2(){
+	vec2 coord = (gl_FragCoord.xy + 0.5) / screenSize;
+	coord = fract(coord * vec2(128.0, 128.0) + 0.5);
+	vec2 texel = coord * vec2(127.0 / 128.0) + vec2(0.5 / 128.0);
+	vec2 noise = textureLod(noisetex, texel, 0.0).rg;
+	return fract(noise + frameCounter * 0.03125);
+}
+
+// Interleaved gradient noise
+float InterleavedNoise(vec2 pos){
+	vec3 magic = vec3(0.06711056, 0.00583715, 52.9829189);
+	return fract(magic.z * fract(dot(pos, magic.xy)));
+}
+
+#endif