pcf

Author: azer89

Shaders/ShadowMapping/PCF.glsl

@@ -1,13 +1,14 @@
-float ShadowPCF(vec4 sc, uint cascadeIndex)
+float ShadowPCF(vec4 shadowCoord, uint cascadeIndex)
 {
 	ivec2 texDim = textureSize(shadowMap, 0).xy;
 	float scale = shadowUBO.pcfScale;
 	float dx = scale * 1.0 / float(texDim.x);
 	float dy = scale * 1.0 / float(texDim.y);
 
 	vec3 N = normalize(normal);
-	vec3 lightDir = normalize(shadowUBO.lightPosition.xyz - worldPos);
-	float bias = max(shadowUBO.shadowMaxBias * (1.0 - dot(N, lightDir)), shadowUBO.shadowMinBias);
+	vec3 L = normalize(shadowUBO.lightPosition.xyz - worldPos);
+	float NoL = dot(N, L);
+	float bias = max(shadowUBO.shadowMaxBias * (1.0 - NoL), shadowUBO.shadowMinBias);
 
 	// TODO Find out a better blurring technique concerning multiple shadow maps
 	const int range = 1;
@@ -18,8 +19,8 @@ float ShadowPCF(vec4 sc, uint cascadeIndex)
 		for (int y = -range; y <= range; y++)
 		{
 			vec2 off = vec2(dx * x, dy * y);
-			float dist = texture(shadowMap, vec3(sc.st + off, cascadeIndex)).r;
-			shadow += (sc.z - bias) > dist ? 0.1 : 1.0;
+			float dist = texture(shadowMap, vec3(shadowCoord.st + off, cascadeIndex)).r;
+			shadow += (shadowCoord.z - bias) > dist ? 0.1 : 1.0;
 			count++;
 		}
 	}