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engines/hpl1/engine/impl/shaders/hpl1_BumpSpec_Light.fragment

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+// Copyright 2006-2010 (C) - Frictional Games
+//
+// This file is part of HPL1 Engine
+//
+// For conditions of distribution and use, see copyright notice in LICENSE-shaders
+//
+
+///////////////////////////////////////////////////////
+/// BUMP SPECULAR LIGHTING FRAGMENT PROGRAM ///////////
+///////////////////////////////////////////////////////
+
+in vec4 vLightColor;
+in vec2 vUv;
+in vec3 vLightDir;
+in vec3 vHalfVec;
+
+OUTPUT
+
+uniform sampler2D tex0; //diffuseMap
+uniform sampler2D tex1; //normalMap
+uniform samplerCube tex2; //normalCubeMap
+uniform sampler1D tex3; //falloffMap
+
+void main()
+{
+	float attenuation = texture1D(tex3,dot(vLightDir,vLightDir)).x;
+
+	vec4 bumpVec = texture(tex1, vUv);
+	bumpVec.xyz = (2.0*bumpVec.xyz)-vec3(1.0);
+
+	vec3 normLightDir = normalize(vLightDir);
+	vec3 normHalfVec = normalize(vHalfVec);
+
+	float specular = clamp(dot(normHalfVec, bumpVec.xyz), 0.0, 1.0);
+	specular = pow(specular, 16.0) * vLightColor.w * clamp(bumpVec.w, 0.0, 1.0);
+
+	outColor.xyz = texture(tex0, vUv).xyz * vLightColor.xyz * dot(normLightDir, bumpVec.xyz) +
+					specular;
+	outColor.xyz *= attenuation;
+}