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

shaders/Lib/IndividualFunctions/EndSky.glsl

@@ -0,0 +1,39 @@
+#include "/Lib/Settings.glsl"
+#include "/Lib/Utilities.glsl"
+// MinecraftPT — End Sky
+// End dimension sky: stars, planet, accretion disc around black hole.
+
+#ifndef END_SKY_GLSL
+#define END_SKY_GLSL
+
+vec3 GetEndSky(vec3 dir, vec3 sunDir){
+	dir = normalize(dir);
+
+	// Dark base
+	vec3 color = vec3(0.01, 0.01, 0.02);
+
+	// Stars (hash-based)
+	float stars = 0.0;
+	vec3 starDir = dir;
+	for (int i = 0; i < 32; i++){
+		vec3 seed = vec3(i * 0.1, 0.5, 0.7);
+		vec3 starPos = normalize(hash3(seed.xy) - 0.5);
+		float star = exp(-(1.0 - dot(dir, starPos)) * 1000.0);
+		stars += star * hash1(seed.xy);
+	}
+	color += stars * 0.5;
+
+	// Planet (distant body)
+	vec3 planetDir = normalize(vec3(0.5, 0.3, 0.0));
+	float planet = exp(-(1.0 - dot(dir, planetDir)) * 200.0);
+	color += vec3(0.3, 0.4, 0.6) * planet * 0.8;
+
+	// Accretion disc (around planet)
+	float disc = exp(-abs(dot(normalize(dir.xz), normalize(planetDir.xz))) * 50.0);
+	disc *= step(abs(dir.y), 0.1);
+	color += vec3(1.0, 0.6, 0.2) * disc * 0.5;
+
+	return color;
+}
+
+#endif