float3 vLight;
float AmbientIntensity;
float DiffuseIntensity;
float SpecularIntensity;
float4 AmbientColor;
float4 DiffuseColor;
float4 SpecularColor;
float SpecularPow;samplerCUBE Environment;struct PS_INPUT
{float3 Normal   : TEXCOORD0;float3 Eye      : TEXCOORD1;
};float4 ps_main( PS_INPUT Input ) : COLOR0
{float3 light = normalize(vLight);float3 eye = normalize(Input.Eye);float3 normal = normalize(Input.Normal);float ndl = saturate(dot(light, normal));//光线的反射方向float3 r = normalize(reflect(-light, normal));float rdv = pow(saturate(dot(r, eye)), SpecularPow);//环境贴图 //这两行主要功能float3 reflectEye = reflect(-eye, normal);float4 reflectColor = texCUBE(Environment, reflectEye);//光照方程float4 color = AmbientColor * AmbientIntensity + DiffuseColor * DiffuseIntensity * ndl + SpecularColor * SpecularIntensity * rdv;return reflectColor * color;
}

主要代码就是

      float3 reflectEye = reflect(-eye, normal);float4 reflectColor = texCUBE(Environment, reflectEye);

float4x4 matWorldViewProjection;
float4x4 matWorldInverseTranspose;
float4x4 matWorld;
float4 vViewPosition;struct VS_INPUT
{float4 Position : POSITION0;float4 Normal   : NORMAL0;
};struct VS_OUTPUT
{float4 Position : POSITION0;float3 Normal   : TEXCOORD0;float3 Eye      : TEXCOORD1;
};VS_OUTPUT vs_main( VS_INPUT Input )
{VS_OUTPUT Output;Output.Position = mul( Input.Position, matWorldViewProjection );//法线变换要用世界矩阵逆矩阵的转置矩阵，但除了做非等比例的缩放时，直接用世界矩阵也可以Output.Normal = mul ( Input.Normal, matWorldInverseTranspose );//视线Output.Eye = vViewPosition - mul(Input.Position, matWorld);return( Output );}