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

shaders/Lib/Programs/Composite/Sky_End_FS.glsl

@@ -0,0 +1,28 @@
+// MinecraftPT — Sky_End_FS
+// End dimension sky rendering pass.
+
+#include "/Lib/Settings.glsl"
+#include "/Lib/BasicFunctions/LightingConstants.glsl"
+#include "/Lib/Utilities.glsl"
+#include "/Lib/IndividualFunctions/EndSky.glsl"
+
+uniform sampler2D depthtex0;
+
+layout(location = 0) out vec4 colorOut;
+
+void main(){
+	ivec2 texelCoord = ivec2(gl_FragCoord.xy);
+
+	float depth = texelFetch(depthtex0, texelCoord, 0).r;
+	if (depth < 1.0){
+		discard;
+	}
+
+	vec4 viewPos = gbufferProjectionInverse * vec4(vec2(texelCoord) / screenSize * 2.0 - 1.0, 1.0, 1.0);
+	vec3 viewDir = normalize(viewPos.xyz / viewPos.w);
+	vec3 worldDir = normalize(mat3(gbufferModelViewInverse) * viewDir);
+
+	vec3 color = GetEndSky(worldDir, GetSunDirWorld());
+
+	colorOut = vec4(color, 1.0);
+}