struct VS_OUTPUT {
   float4 Pos:       POSITION;
   float3 normal:    TEXCOORD0;
   float4 lightVec : TEXCOORD1;
   float4 viewVec:   TEXCOORD2;
   float4 shadowCrd: TEXCOORD3;
   float2 texCoord:  TEXCOORD4;
   float2 texCoordNormalized: TEXCOORD5;
   float4 lightVecNM: TEXCOORD6;
   float3 halfvec: TEXCOORD7;
};

float distanceScale;
float4 lattenuation;
float4 lightPosition;
float4 lightDirection;
float4 cameraPosition;
float4x4 worldviewproj;
float4x4 worldmatrix;
float4x4 proj_matrix;
float time_0_X;

VS_OUTPUT main_vp(
      float4 position : POSITION,
      float3 normal : NORMAL,
      float2 texCoord : TEXCOORD0,
      float2 texCoordNormalized : TEXCOORD1,
      float3 inTangent : TEXCOORD2,
      float3 inBinormal : BINORMAL
      )
{

	VS_OUTPUT Out;

	Out.Pos = mul(worldviewproj, position);

	//------------------------------------------------------------
	// World-space lighting
	//------------------------------------------------------------
	// world_pos,lightPosition,
	float world_pos = mul(worldmatrix,position);
	Out.normal = normal;
	Out.lightVec = lightPosition - world_pos;  // Used for shadow mapping
	float dist = length(Out.lightVec.xyz);
	Out.lightVecNM.xyz = -Out.lightVec.xyz / dist; // For shadow mapping we were using distanceScale
	Out.lightVecNM.w = clamp(0.0,1.0,1.0 / (lattenuation.x + lattenuation.y * dist + lattenuation.z * dist * dist) );

	// Debugging purpose...
	normal = mul(worldmatrix,normal);
	inTangent = mul(worldmatrix,inTangent);
	inBinormal = mul(worldmatrix,inBinormal);

	float3x3 tangentSpace;
	// In Ogre3D the TAG BINORMAL and TANGENT are not used...
	tangentSpace[0] = inTangent;
	tangentSpace[1] = cross(inTangent,normal.xyz);
	tangentSpace[2] = normal.xyz;

	Out.viewVec = normalize(cameraPosition - world_pos);
	
	// Converted to Tangent-space
	Out.halfvec = mul(tangentSpace,normalize(Out.lightVecNM.xyz+Out.viewVec.xyz));
	Out.lightVecNM = float4(mul(tangentSpace,Out.lightVecNM.xyz),Out.lightVecNM.w);

	Out.texCoord = texCoord;
	Out.texCoordNormalized = texCoordNormalized;

	//------------------------------------------------------------
	// Light-space coordinates
	//------------------------------------------------------------
	float4 sPos = mul(proj_matrix, position);
	//float4 sPos = mul(position,proj_matrix);
	sPos.z += 10;
	//Out.shadowCrd.x = 0.5 * (sPos.z + sPos.x);
	//Out.shadowCrd.y = 0.5 * (sPos.z - sPos.y);
	//Out.shadowCrd.z = 0;
	//Out.shadowCrd.w = sPos.z;

	//Out.shadowCrd.x = sPos.x;
	//Out.shadowCrd.y = 1.0 - sPos.y;
	//Out.shadowCrd.z = 0.0;
	//Out.shadowCrd.w = sPos.z;

	Out.shadowCrd.x = sPos.x;
	Out.shadowCrd.y = 1.0 - sPos.y;
	Out.shadowCrd.z = 0.0;
	Out.shadowCrd.w = sPos.z;

	return Out;
}