uniform float4x4 ModelViewProj;
uniform float4x4 ModelView;
uniform float3x3 ModelViewIT;
uniform float3	light_pos[3];
 
 
struct vertexin
{
	float4	Position	: POSITION;
	float3	Normal	 	: NORMAL;
	float4	Color		: COLOR0;
 
	float2 skin_coords	: TEXCOORD0;
	float2 normal_coords	: TEXCOORD1;
 
	uniform float3	vert_tan;
};
 
struct vertexout
{
	float4	Position	: POSITION;
	float4	Color		: COLOR0;
	float3	world_pos;
 
	float2 skin_coords	: TEXCOORD0;
	float2 normal_coords	: TEXCOORD1;
 
	float3	light_dir[3]	: TEXCOORD5; 
 
};
 
vertexout ds_vs(vertexin IN) {
	vertexout OUT;
 
 
	OUT.world_pos	= IN.Position;
	OUT.Position	= mul(ModelViewProj, IN.Position);
 
 
	OUT.Color		= IN.Color;
	OUT.skin_coords		= IN.skin_coords;
	OUT.normal_coords	= IN.normal_coords;
 
 
	float3 tangent = normalize(IN.vert_tan);

	float3 binormal = normalize(cross(IN.Normal, tangent));
 
	float3x3 tMatrix	= float3x3(tangent, binormal, IN.Normal);


 
	float3 lightDir = normalize(light_pos[0] - OUT.world_pos);
 
	OUT.light_dir[0] = mul(tMatrix, lightDir);
 

	return OUT;
}
 
 
 
float4 ds_ps(vertexout IN, uniform sampler2D diffuseMap : TEXUNIT0, uniform sampler2D NormalMap : TEXUNIT1) : COLOR
{
 
 

	float3 Normal		= 2.0 * (tex2D(NormalMap, IN.normal_coords) - 0.5);
	Normal = normalize(Normal);
 
	Normal = float3(0,0,1);	// Temp.
 
	float3 Direction	= normalize(IN.light_dir[0]);
 
 
 
	float light_dot		= saturate(dot(Normal, Direction));
 

	return light_dot;
 
}