Normal Mapping: Theory and Practice
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Page 4 of 4
/*Fragment Shader*/
struct vertout
{
float4 HP : POSITION;
float2 UV : TEXCOORD0;
float3 N : TEXCOORD1;
float3 T : TEXCOORD4;
float3 B : TEXCOORD2;
float3 V : TEXCOORD3;
};
float4 main( vertout IN,
uniform float Kr,
uniform float3 coloration,
uniform sampler2D normalMap,
uniform samplerCUBE envMap
) : COLOR
{
float3 NObj = 2.0*tex2D(normalMap, IN.UV).xyz - 1.0;
float3 NWorld = normalize( NObj.x * IN.T + NObj.y * IN.B + NObj.z * IN.N );
float3 refl = reflect(-IN.V, NWorld);
float4 fresnel = texCUBE( envMap, refl.xyz ) * Kr;
fresnel.xyz = fresnel.xyz * coloration;
fresnel.a = 1;
return fresnel;
}
struct vertout
{
float4 HP : POSITION;
float2 UV : TEXCOORD0;
float3 N : TEXCOORD1;
float3 T : TEXCOORD4;
float3 B : TEXCOORD2;
float3 V : TEXCOORD3;
};
float4 main( vertout IN,
uniform float Kr,
uniform float3 coloration,
uniform sampler2D normalMap,
uniform samplerCUBE envMap
) : COLOR
{
float3 NObj = 2.0*tex2D(normalMap, IN.UV).xyz - 1.0;
float3 NWorld = normalize( NObj.x * IN.T + NObj.y * IN.B + NObj.z * IN.N );
float3 refl = reflect(-IN.V, NWorld);
float4 fresnel = texCUBE( envMap, refl.xyz ) * Kr;
fresnel.xyz = fresnel.xyz * coloration;
fresnel.a = 1;
return fresnel;
}
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