float4x4 mvp : ModelViewProjection;
float4x4 mv : ModelView;
float4x4 mvit : ModelViewIT;
samplerCUBE skybox : SKYBOX;
string jointGeo = "cylinder.obj";
sampler2D normal<string fileName = "normal.tga";> = sampler_state {
  generateMipMap = true;
  minFilter = Linear;
  magFilter = Linear;
  wrapS = Repeat;
  wrapT = Repeat;
};

float3 expand(float3 v) { return (v-0.5)*2; }
float4 vertex(uniform float4x4 modelViewProj,
              uniform float4x4 modelView,
              uniform float4x4 modelViewIT,
              float4 P : POSITION,
              float4 N : NORMAL,
	      float2 uvIn : TEXCOORD0,
		 in float4 Cin : COLOR0,
              out float4 CC : COLOR0,
              out float3 Pcam : TEXCOORD1,
              out float3 Ncam : TEXCOORD2,
	      out float2 uv : TEXCOORD0) : POSITION
{
    CC.xyz =  normalize(N.xyz);
    Pcam = mul(modelView, P).xyz;
    Ncam = mul(modelViewIT, N).xyz;
    //float3x3 rotation = (float3x3)modelView;
    //Ncam.xyz = mul(rotation,N.xyz);
    
    uv = uvIn;
    return mul(modelViewProj, P);
}


float4 light(	uniform float4 col,
                  in float3 texcoord,
                  float3 Pcam : TEXCOORD1, 
                  float3 Ncam : TEXCOORD2) : COLOR 
{
	float3 tan = normalize(col.xyz);
    float3 wo = normalize(-Pcam);
    float3 result;// = ambient;
    float3 Nn = normalize(Ncam);
    float3 Nn2 = Nn; 
float3 biNorm = normalize(cross(tan,Nn));
    float3x3 toTexture = transpose(float3x3(tan,biNorm,Nn));

	Nn = mul(toTexture,expand(tex2D(normal,texcoord)));
	Nn = normalize(Nn+2*Nn2);
   
    	 float3 scolor = float3(1.0,1.0,1.0);
        float3 Ln = normalize(float3(0,0,-1)-Pcam);
        float3 lcolor = float3(1,1,1);
        float3 Hn = normalize(wo + Ln);
        float ldn = dot(Ln,Nn);
        float hdn = dot(Hn,Nn);
        float4 litV = lit(ldn, hdn, 32);
     
   col = texCUBE(skybox,Nn);       
    result = col*litV.y + scolor*litV.z;
    return float4(result, 1.);
}

technique red <string target = "joints";>
{
	pass p0
	{
 		VertexProgram = compile arbvp1 vertex(mvp, mv, mvit);
 		FragmentProgram = compile arbfp1 light(float4(1.0, 0.0 ,0.0 ,1.0));
	
	}
}

technique red <string target = "parts";>
{
	pass p0
	{
 		VertexProgram = compile arbvp1 vertex(mvp, mv, mvit);
 		FragmentProgram = compile arbfp1 light(float4(0.0, 1.0 ,0.0 ,1.0));
	
	}
}