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Added alpha-mapping support

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Former-commit-id: ba4598e9e5efc47e04e72dc709d64d214d77e9a1
This commit is contained in:
Lynix
2013-05-16 22:47:25 +02:00
parent 0b66452e33
commit 4b68ff0118
6 changed files with 110 additions and 25 deletions
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19
src/Nazara/Renderer/ShaderBuilder.cpp
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@@ -75,6 +75,9 @@ namespace
"uniform vec4 MaterialAmbient;\n";
}
if (flags & nzShaderFlags_AlphaMapping)
sourceCode += "uniform sampler2D MaterialAlphaMap;\n";
if ((flags & nzShaderFlags_DiffuseMapping) == 0 || flags & nzShaderFlags_Lighting)
sourceCode += "uniform vec4 MaterialDiffuse;\n";
@@ -280,17 +283,27 @@ namespace
sourceCode += ";\n";
if (flags & nzShaderFlags_AlphaMapping)
sourceCode += "float alpha = " + textureLookupKW + "(MaterialAlphaMap, vTexCoord).r;\n";
else
sourceCode += "float alpha = MaterialDiffuse.a;\n";
if (flags & nzShaderFlags_EmissiveMapping)
{
sourceCode += "vec3 emission = vec3(" + textureLookupKW + "(MaterialEmissiveMap, vTexCoord));\n"
+ fragmentColorKW + " = vec4(mix(lighting, emission, length(emission)), MaterialDiffuse.a);";
+ fragmentColorKW + " = vec4(mix(lighting, emission, length(emission)), alpha);\n";
///NOTE: Pour un shader avec un coût réduit avec une qualité moyenne, il est possible de remplacer "length(emission)" par "dot(emission, emission)"
}
else
sourceCode += fragmentColorKW + " = vec4(lighting, MaterialDiffuse.a);";
sourceCode += fragmentColorKW + " = vec4(lighting, alpha);\n";
}
else if (flags & nzShaderFlags_DiffuseMapping)
sourceCode += fragmentColorKW + " = " + textureLookupKW + "(MaterialDiffuseMap, vTexCoord);\n";
{
if (flags & nzShaderFlags_AlphaMapping)
sourceCode += fragmentColorKW + " = vec4(" + textureLookupKW + "(MaterialDiffuseMap, vTexCoord).rgb, " + textureLookupKW + "(MaterialAlphaMap, vTexCoord).r);\n";
else
sourceCode += fragmentColorKW + " = " + textureLookupKW + "(MaterialDiffuseMap, vTexCoord);\n";
}
else
sourceCode += fragmentColorKW + " = MaterialDiffuse;\n";