//////////////////////////////
// Hair Fx
//////////////////////////////
#define nrm normalize
#define sat saturate
#define dst distance

//////////////////////////////
// Matrix
//////////////////////////////
float4x4 matWorld;
float4x4 matViewProj;
float4x4 matWorldViewProj;
float4 vecViewPos;
float4 vecTime;

//////////////////////////////
// Lighting
//////////////////////////////
float4 vecSunDir;
float4 vecAmbient;
float4 vecLightColor[8];
float4 vecLightPos[8];
int iLights;

//////////////////////////////
// Coloring
//////////////////////////////


//////////////////////////////
// Tweakables
//////////////////////////////
float  vecSkill1;
float4 vecSkill41;
float4 vecSkill45;

//////////////////////////////
// Texture Reference
//////////////////////////////
texture entSkin1;
texture entSkin2;

sampler SKIN = sampler_state {texture = <entSkin1>;};
sampler FUR = sampler_state {texture = <entSkin2>;};


//////////////////////////////
// Data Structs
//////////////////////////////


//////////////////////////////
// Additonal Functions
//////////////////////////////



//////////////////////////////
// Vertex Shader
//////////////////////////////
float4 VS (	uniform float O,
		in float4 P : POSITION,
		in float2 T : TEXCOORD0,
		in float3 N : NORMAL,

		out float4 tex : TEXCOORD0,
		out float3 light : TEXCOORD1) : POSITION 
{		
	tex.xy = T;	
	tex.z = pow(O / 30,2);	
	tex.w = 0.5 - (dst(mul(P,matWorld),vecViewPos) > vecSkill1);
	
	P.xyz += vecSkill41.x * O * N + tex.z;
	float4 pos = mul(P,matWorld);
	//pos.y -= tex.z * vecSkill45.x;
	pos.z -= tex.z * vecSkill45.x;
	
	light = vecAmbient;
	for (int L=0; L<iLights; L++) 
		light += (1 - sat(length(pos.xyz - vecLightPos[L].xyz) / vecLightPos[L].w))
		* sat(dot(mul(N,matWorld),-nrm(pos - vecLightPos[L])))
		* vecLightColor[L] * 10;
	
	return mul(pos,matViewProj);
}

//////////////////////////////
// Pixle Shader
//////////////////////////////
float4 PS (	in float4 tex : TEXCOORD0,
		in float3 light : TEXCOORD1) : COLOR 
{
	clip(tex.w);

	float3 skin 	= tex2D(SKIN,tex.xy);
	float  len 	= tex2D(FUR,tex.xy).a;
	float4 fur 	= tex2D(FUR,tex.xy * vecSkill41.w);

	fur.a = (fur.rgb * vecSkill41.z - pow(tex.z,4)) * len;
	clip (fur.a);
	fur.rgb = lerp(fur,skin,vecSkill41.y);
	fur.rgb *= light;
	return fur;
}
	
///////////////////////////////////////
/// TECHNIQUES 
////////////////////////
technique t 
{	
	pass p 
	{
		ZEnable = true;
		ZWriteEnable = true;
		AlphaBlendEnable =false;
		AlphaTestEnable = TRUE;

		VertexShader = compile vs_2_0 VS(1);
		PixelShader = compile ps_2_0 PS();
	}
	
	pass p {VertexShader = compile vs_2_0 VS(2);PixelShader = compile ps_2_0 PS();}
	pass p {VertexShader = compile vs_2_0 VS(3);PixelShader = compile ps_2_0 PS();}
//	pass p {VertexShader = compile vs_2_0 VS(4);PixelShader = compile ps_2_0 PS();}
//	pass p {VertexShader = compile vs_2_0 VS(5);PixelShader = compile ps_2_0 PS();}
//	pass p {VertexShader = compile vs_2_0 VS(6);PixelShader = compile ps_2_0 PS();}
//	pass p {VertexShader = compile vs_2_0 VS(7);PixelShader = compile ps_2_0 PS();}
//	pass p {VertexShader = compile vs_2_0 VS(8);PixelShader = compile ps_2_0 PS();}
//	pass p {VertexShader = compile vs_2_0 VS(9);PixelShader = compile ps_2_0 PS();}
//	pass p {VertexShader = compile vs_2_0 VS(10);PixelShader = compile ps_2_0 PS();}
}