//==========================================//
//#define USE_COLOR_INTENSITY_SHIFT
//#define USE_COLOR_INTENSITY_MASK

float max_colorintensity=4;

float max_sunintensity=1.1;
float min_sunintensity=0.1;
//==========================================//

bool AUTORELOAD;

float4x4 matWorldViewProj;
float4x4 matWorld;

float4 vecSunDir;		
float4 vecSunColor;		

texture entSkin1;

texture mtlSkin1;

sampler COLOR_SAMPLER = sampler_state { Texture   = <entSkin1>; MinFilter = Linear; MagFilter = Linear; MipFilter = Linear;    AddressU  = clamp; AddressV  = clamp; };
sampler LGRAD_SAMPLER = sampler_state { Texture   = <mtlSkin1>; MinFilter = Linear; MagFilter = Linear; MipFilter = Linear;    AddressU  = clamp; AddressV  = clamp; };

#ifdef USE_COLOR_INTENSITY_SHIFT
	#ifdef USE_COLOR_INTENSITY_MASK
		texture entSkin2;
		sampler MASK_SAMPLER = sampler_state { Texture   = <entSkin2>; MinFilter = Linear; MagFilter = Linear; MipFilter = Linear;    AddressU  = clamp; AddressV  = clamp; };
	#endif
#endif


void VS(		
in float4 vPos		   : POSITION,
in float3 normal	   : NORMAL,
in float2 InTex	   : TEXCOORD0,

out float2 OutTex	      : TEXCOORD0,			
out float3 outnormal    : TEXCOORD1,

out float4 Pos	         : POSITION
)
{
	outnormal=mul(normal,matWorld);
	
	Pos = mul(vPos,matWorldViewProj);
	
	OutTex = InTex;
}


void PS(	
in float2 Tex	      : TEXCOORD0,			
in float3 normal     : TEXCOORD1,

out float4 COL :COLOR0
) 
{
	normal      = normalize(normal);

	COL = tex2D(COLOR_SAMPLER,Tex);

	float sun_blub=dot(vecSunDir,normal)*0.5f+0.5f;

	float sun_diff=tex1D(LGRAD_SAMPLER,sun_blub);
	sun_diff=lerp(min_sunintensity,max_sunintensity,sun_diff);

	#ifdef USE_COLOR_INTENSITY_SHIFT

		#ifdef USE_COLOR_INTENSITY_MASK
			COL.rgb=lerp(COL.rgb,pow(COL.rgb,lerp(max_colorintensity,1,min(1,sun_diff))),tex2D(MASK_SAMPLER,Tex));
			#else
			COL.rgb=pow(COL.rgb,lerp(max_colorintensity,1,min(1,sun_diff)));
		#endif

	#endif
	
	COL.rgb=COL.rgb*sun_diff;//*vecSunColor;
//	COL.rgb=tex2D(MASK_SAMPLER,Tex);
}

technique Shading
{
	pass P0
	{	
		zenable=true;
		zwriteenable=true;
		alphablendenable=false;
		alphatestenable=true;
		
		AlphaRef=0;
		AlphaFunc=Greater;
		
		VertexShader = compile vs_2_0 VS();
		PixelShader  = compile ps_2_0 PS();
	}
}