1 files changed, 83 insertions, 0 deletions
diff --git a/shaders/humus-dynamicbranching/5.frag b/shaders/humus-dynamicbranching/5.frag
new file mode 100644
index 0000000..c3027fc
--- /dev/null
+++ b/shaders/humus-dynamicbranching/5.frag
@@ -0,0 +1,83 @@
+#version 120
+#define saturate(x) clamp(x,0.0,1.0)
+#define lerp mix
+#define BRANCHING
+#define LIGHT_COUNT 3
+#line 43
+uniform sampler2D Base;
+uniform sampler2D Bump;
+uniform samplerCube ShadowMap;
+
+uniform vec3 lightColor[LIGHT_COUNT];
+uniform vec2 plxCoeffs;
+
+uniform bool hasParallax;
+
+varying vec3 lVec[LIGHT_COUNT];
+varying vec2 texCoord;
+varying vec3 vVec;
+#ifdef SHADOWS
+varying vec3 shadowVec[LIGHT_COUNT];
+#endif
+
+void main(){
+//	float atten[LIGHT_COUNT];
+	vec3 atten;
+	for (int i = 0; i < LIGHT_COUNT; i++){
+		atten[i] = 1.0 - dot(lVec[i], lVec[i]);
+	}
+	atten = max(atten, 0.0);
+
+
+	vec3 viewVec = normalize(vVec);
+
+	vec2 plxTexCoord = texCoord;
+	if (hasParallax){
+		float height = texture2D(Bump, texCoord).w;
+		float offset = height * plxCoeffs.x + plxCoeffs.y;
+		plxTexCoord += offset * viewVec.xy;
+	}
+
+	vec3 base = texture2D(Base, plxTexCoord).rgb;
+	vec3 lighting = 0.1 * base;
+
+#ifdef BRANCHING
+	if (dot(atten, atten) > 0.0)
+#endif
+	{
+
+		vec3 bump = texture2D(Bump, plxTexCoord).xyz * 2.0 - 1.0;
+		bump = normalize(bump);
+		vec3 reflVec = reflect(-viewVec, bump);
+
+		for (int i = 0; i < LIGHT_COUNT; i++){
+#ifndef BRANCHING
+			atten[i] *= float(lVec[i].z > 0.0);
+#else
+			if (atten[i] > 0.0)
+			if (lVec[i].z > 0.0)
+#endif
+			{
+
+#ifdef SHADOWS
+#  ifndef BRANCHING
+				atten[i] *= float(length(shadowVec[i]) < textureCube(ShadowMap, shadowVec[i])[i]);
+#  else
+				if (length(shadowVec[i]) < textureCube(ShadowMap, shadowVec[i])[i])
+#  endif
+#endif
+				{
+					vec3 lightVec = normalize(lVec[i]);
+
+					float diffuse = saturate(dot(lightVec, bump));
+					float specular = pow(saturate(dot(reflVec, lightVec)), 16.0);
+
+					lighting += atten[i] * lightColor[i] * (diffuse * base + 0.6 * specular);
+				}
+			}
+		}
+	}
+
+	gl_FragColor.rgb = lighting;
+}
+