struct vertexOut {
   float4 HPosition   : POSITION;
   float4 TexCoord    : TEXCOORD0;
   float3 LightVec    : TEXCOORD1;
   float3 EyeVec      : TEXCOORD2;
   float3 WorldNormal : TEXCOORD3;
   float3 WorldView   : TEXCOORD4;
};

struct pixelOut {
   float4 col : COLOR;
};

pixelOut main(vertexOut IN, uniform sampler2D Texture)
{
   pixelOut OUT;

   half SpecExpon = 200;
   float4 AmbiColor = { 0.5, 0.5, 0.5, 1.0 };
   float4 LightColor = { 1, 1, 1, 1 };
   float4 diffuse_color = tex2D (Texture, IN.TexCoord.xy);

   half3 Ln = normalize (IN.LightVec);
   half3 Nn = normalize (IN.WorldNormal);
   half3 Vn = normalize (IN.WorldView);
   
   half3 Hn = normalize (Ln + Vn);
   half ldn = dot (Ln, Nn);
   half hdn = dot (Hn, Nn);

   half4 litV = lit (ldn, hdn, SpecExpon);
   //half4 diffContrib = glstate.material.diffuse * (litV.y * LightColor + glstate.lightmodel.ambient);
   //half4 specContrib = litV.y * litV.z * LightColor;
   //half4 result = diffContrib + specContrib;
   half4 result = diffuse_color * litV.y + LightColor * litV.z;
 //  half4 result = AmbiColor + glstate.material.diffuse * litV.y + LightColor * litV.z;

   OUT.col = result;
   return OUT;
}