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

shaders/Lib/Programs/Composite/MotionBlur_FS.glsl

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+// MinecraftPT — MotionBlur_FS
+// Per-pixel camera motion blur using motion vectors.
+
+#include "/Lib/Settings.glsl"
+#include "/Lib/Utilities.glsl"
+#include "/Lib/BasicFunctions/TemporalNoise.glsl"
+
+uniform sampler2D colortex12;
+uniform sampler2D colortex10;
+
+layout(location = 0) out vec4 colorOut;
+
+void main(){
+	vec2 texelCoord = gl_FragCoord.xy;
+
+	vec3 color = texelFetch(colortex12, ivec2(texelCoord), 0).rgb;
+
+	#ifdef MOTION_BLUR
+		if (MOTION_BLUR > 0){
+			vec2 motion = texelFetch(colortex10, ivec2(texelCoord * 0.5), 0).xy * 2.0;
+			float speed = length(motion);
+
+			if (speed > 0.5){
+				// Shutter angle sampling
+				float shutterAngle = mix(90.0, 360.0, MOTION_BLUR_SUTTER_SPEED);
+				float samples = float(MOTION_BLUR_QUALITY);
+				float dither = BlueNoiseTemporal();
+
+				vec2 dir = normalize(motion);
+				float length = min(speed, 32.0) * 0.5;
+
+				vec3 acc = vec3(0.0);
+				for (int i = 0; i < MOTION_BLUR_QUALITY; i++){
+					float t = (float(i) + dither) / samples - 0.5;
+					vec2 sampleCoord = texelCoord + dir * length * t;
+					acc += textureLod(colortex12, sampleCoord / screenSize, 0.0).rgb;
+				}
+
+				color = acc / samples;
+			}
+		}
+	#endif
+
+	colorOut = vec4(color, 1.0);
+}