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Generate texture coordinates per-pixel when normal map + environment map are used

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This commit is contained in:
scrawl 2016-02-24 21:28:55 +01:00
parent 5f4ace1bc2
commit 5e105da3ba
1 changed files with 12 additions and 0 deletions
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12
files/shaders/objects_fragment.glsl
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@ -89,10 +89,22 @@ void main()
gl_FragData[0].xyz += texture2D(emissiveMap, emissiveMapUV).xyz;
#endif
#if @envMap
#if @normalMap
// if using normal map + env map, take advantage of per-pixel normals for texCoordGen
vec3 viewVec = normalize(passViewPos.xyz);
vec3 r = reflect( viewVec, viewNormal );
float m = 2.0 * sqrt( r.x*r.x + r.y*r.y + (r.z+1.0)*(r.z+1.0) );
vec2 texCoordGen = vec2(r.x/m + 0.5, r.y/m + 0.5);
gl_FragData[0].xyz += texture2D(envMap, texCoordGen).xyz * envMapColor.xyz;
#else
gl_FragData[0].xyz += texture2D(envMap, envMapUV).xyz * envMapColor.xyz;
#endif
#endif
#if @specularMap
vec4 specTex = texture2D(specularMap, specularMapUV);
float shininess = specTex.a * 255;