struct VS_INPUT
{
    float3  Position   : POSITION;
    float3  Normal     : NORMAL;
    float2  Tex0       : TEXCOORD0;
    float4  Weights    : TEXCOORD1;
    float4  Indices    : TEXCOORD2;    
};

struct VS_OUTPUT
{
    float4  Pos     : POSITION;
    float3  Diffuse : COLOR;
    float2  Tex0    : TEXCOORD0;
};


VS_OUTPUT main(VS_INPUT IN,
		uniform float4x3    mWorldMatrixArray[22],
		uniform float4x4 WorldViewProj)
{
    VS_OUTPUT   OUT;
    float3      Normal = 0.0f;    

    float i;        // Index into matrix palette

    float4 inPos;
    inPos.xyz = IN.Position;
    inPos.w = 1;

	
    float3 tempPos, tempNormal;
	
	
    /////////////////////////////////////////////////////////////////////
    // FIRST BONE
    // We don't worry about the ELSE condition because we defined the 
    // initial conditions.

    // grab first bone matrix
    i = IN.Indices.x;

	
    // First transformed position and normal
    tempPos = mul(inPos, mWorldMatrixArray) * IN.Weights.x;
	tempNormal = mul(IN.Normal, (float3x3)mWorldMatrixArray) * IN.Weights.x;
	
	
    /////////////////////////////////////////////////////////////////////
    // SECOND BONE
    // Next bone.

    i = IN.Indices.y;

		
    // Add second transformed position and normal
    tempPos += mul(inPos, mWorldMatrixArray) * IN.Weights.y;
    tempNormal += mul(IN.Normal, (float3x3)mWorldMatrixArray) * IN.Weights.y;
	
    /////////////////////////////////////////////////////////////////////
    // THIRD BONE
    // Note we only skin the normal by the first two bones, these are by 
    // far the most significant.

	i = IN.Indices.z;

	// Add third transformed position only
	tempPos += mul(inPos, mWorldMatrixArray) * IN.Weights.z;

	/////////////////////////////////////////////////////////////////////
	// FOURTH BONE

	i = IN.Indices.w;
                
	// Add fourth transformed position only
	tempPos += mul(inPos, mWorldMatrixArray) * IN.Weights.w;
	
	
    // normalize normals
	Normal = normalize(tempNormal);
	//OUT.Diffuse.xyz = max(dot(Normal, lhtDir), 0).xxx;
	OUT.Diffuse.x=1;
	OUT.Diffuse.y=1;
	OUT.Diffuse.z=1;


    // copy the input texture coordinate through
    OUT.Tex0  = IN.Tex0.xy;

    float4 finalPos;
    finalPos.xyz = tempPos;
    finalPos.w = 1;
    
	// Transform the final skinned position
    OUT.Pos = mul(finalPos, WorldViewProj);
		
	
    return OUT;
}