#include "res/shaders/lights.cg"
float4x4 mvp : ModelViewProjection;
float4x4 mv : ModelView;
float4x4 mvit : ModelViewIT;


sampler2D greenTex <string fileName = "green2.png";> = sampler_state {
  minFilter = Linear;
  magFilter = Linear;
  wrapS = Repeat;
  wrapT = Repeat;
};
sampler2D green2Tex<string fileName = "green4.png";> = sampler_state {
  generateMipMap = true;
  minFilter = Linear;
  magFilter = Linear;
  wrapS = Repeat;
  wrapT = Repeat;
};


float4 vertex(uniform float offset,
			  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);
    float4 vert = P + N*offset;
    Pcam = mul(mv, vert).xyz;
    Ncam = mul(mvit, N).xyz;
        uv = uvIn;
    return mul(mvp, vert);
}

float4 line(	float4 col: COLOR0,
                  in float3 texcoord,
                  float3 Pcam : TEXCOORD1, 
                  float3 Ncam : TEXCOORD2) : COLOR 
{
    float3 tan = normalize(col.xyz);
    float3 wo = normalize(-Pcam);
    float3 Nn = normalize(Ncam);
    float d = abs(dot(Nn,wo));
float3 result;
    if (d < 0.3)
		return float4(0,0,0,1);
    else
		discard;
}

float4 light(	uniform float4 col,
                  in float3 texcoord,
                  float3 Pcam : TEXCOORD1, 
                  float3 Ncam : TEXCOORD2) : COLOR 
{
    float3 wo = normalize(-Pcam);
    float4 result;// = ambient;
    float3 Nn = normalize(Ncam);
   
    	 float4 scolor = float4(1.0,1.0,1.0,1.0);
        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);
     
    float ds,ss;
	if (litV.y > 0.5)
		ds = 1.0;
	else 
		ds = 0.3;
	
	if (litV.z > 0.5)
		ss = 1.0;
	else
		ss = 0.0;
	float lineS = abs(dot(wo,Nn));	        
    if (lineS < 0.3)
		lineS = 0;
	else
		lineS = 1.0;
    result = col*ds + scolor*ss;
    result *= lineS;
    return result;
}

technique parts <string target = "both";>
{
	pass p0
	{	
		VertexProgram = compile arbvp1 vertex(0.0f);
 		FragmentProgram = compile arbfp1 light(float4(1.0,0.0,0.0,1.0));

	}
	/*
	pass p1
	{	
		LineWidth = 5.0;
		CullFaceEnable = true;
		PolygonMode = int2(FrontAndBack,Line);
		VertexProgram = compile arbvp1 vertex(0.01f);
 		FragmentProgram = compile arbfp1 line();

	}
	*/
}