2d50b47f56
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@12881 178a84e3-b1eb-0310-8ba1-8eac791a3b58
37 lines
951 B
GLSL
37 lines
951 B
GLSL
// Shader based on work by Fabien Sanglard
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// Released under the terms of CC-BY 3.0
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uniform sampler2D BumpTex; //The bump-map
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uniform sampler2D DecalTex; //The texture
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uniform sampler2D LightMapTex;
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int HasLightMap;
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// New bumpmapping
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varying vec3 lightVec;
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varying vec3 halfVec;
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varying vec3 eyeVec;
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void main()
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{
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// lookup normal from normal map, move from [0,1] to [-1, 1] range, normalize
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vec3 normal = 2.0 * texture2D (BumpTex, gl_TexCoord[0].st).rgb - 1.0;
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normal = normalize (normal);
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// compute diffuse lighting
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float lamberFactor = max (dot (lightVec, normal), 0.0) ;
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vec4 diffuseMaterial;
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diffuseMaterial = texture2D (DecalTex, gl_TexCoord[0].st);
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if (HasLightMap < 1)
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{
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// 0.5 is the ambient light
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gl_FragColor = diffuseMaterial * (0.5 + lamberFactor*0.5);
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}
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else
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{
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gl_FragColor = diffuseMaterial * (0.5 + lamberFactor*0.5) * texture2D(LightMapTex, gl_TexCoord[0].st);
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}
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}
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