float4x4 World      : 		WORLD;
float4x4 View       : 		VIEW;
float4x4 Projection : 		PROJECTION;
//float4x4 WorldViewProj: 	WORLDVIEWPROJ;
float4x4 WorldView : 		WORLDVIEW;
float4 viewPosition:        VIEWPOSITION;
 
float screenTexCoordScale ;  // adjust by Browser.windowAspect

float fraction ;  // for water animation

float disturbingScale ; 

// tweakables

texture normalTexture : normalTexture< 
	string UIName = "Normal Texture";
>;

texture reflectionTexture : reflectionTexture< 
>;

texture refractionTexture : refractionTexture< 
>;

texture skyCubeTexture : skyCubeTexture< 
>;

texture fresnelTable : fresnelTable< 
>;

struct VS_OUTPUT
{
	float4 oPos : POSITION;
	float3 oNormalTexCoord :TEXCOORD0;
	float3 oScreenTexCoord :TEXCOORD1;
	float3 oViewVec        :TEXCOORD2;
	float3 oNormal         :TEXCOORD3;
};

VS_OUTPUT VS(
	float3 Pos  : POSITION, 
	float3 NormalTexCoord :TEXCOORD0, 
	float3 ScreenTexCoord :TEXCOORD1,
	float3 Norm 	      :NORMAL
	)

{

VS_OUTPUT Out = (VS_OUTPUT)0;
    
        Out.oNormalTexCoord = NormalTexCoord  ;  
	Out.oNormal         = float3 (0,1,0);//Norm  ; 
	
	Out.oScreenTexCoord.x = - ScreenTexCoord.x/screenTexCoordScale /2 ;
//	Out.oScreenTexCoord.y =  ScreenTexCoord.y/screenTexCoordScale /2 ;
        Out.oScreenTexCoord.y =  -ScreenTexCoord.y/screenTexCoordScale /2 ;//for debug texture flip bug in BS Contact 6.207


	Out.oScreenTexCoord.z = ScreenTexCoord.z ;
	
	Out.oViewVec  	= normalize(Pos.xyz - viewPosition.xyz/viewPosition.w);
	float3 P = mul(float4(Pos, 1),(float4x4)WorldView);  // position (view space)
	Out.oPos = mul(float4(P,1),Projection);
	
	return Out;
   
}

sampler reflmap = sampler_state
{  texture = <reflectionTexture>;
     
    MipFilter = NONE; 
 	// MINFILTER = LINEAR;
	// MAGFILTER = LINEAR;	
 
	MinFilter = POINT; 
	MagFilter = POINT; 
    AddressU  = CLAMP;        
    AddressV  = CLAMP;

};

sampler refrmap = sampler_state 
{ texture = <refractionTexture>; 
    MinFilter = LINEAR; 
    MagFilter = LINEAR; 
	AddressU  = CLAMP;        
    AddressV  = CLAMP;
};

sampler skyCube = sampler_state 
{ texture = <skyCubeTexture>; 
	MINFILTER = LINEAR;
	MAGFILTER = LINEAR;
};

sampler nmap = sampler_state 
{
	texture = <normalTexture>;
	AddressU  = WRAP;		
	AddressV  = WRAP;
	MIPFILTER = POINT;//LINEAR; //
	MINFILTER = LINEAR;
	MAGFILTER = LINEAR;	
};

sampler fresnel= sampler_state
{  texture = <fresnelTable>;
     
    MipFilter = NONE; 
    MinFilter = LINEAR; 
    MagFilter = LINEAR; 
    AddressU  = MIRROR;        
    AddressV  = MIRROR;

};	  

float4 PS(
    float3 NormalTexCoord  : TEXCOORD0 ,
    float3 ScreenTexCoord  : TEXCOORD1 ,
    float3 ViewVec	   : TEXCOORD2 ,
    float3 Norm  	   : TEXCOORD3 

) : COLOR
{

float2 NormalTexCoordTemp;
NormalTexCoordTemp.xy = NormalTexCoord.xy + fraction;  
float4 normalAnimMapColor = tex2D(nmap, NormalTexCoordTemp); //fetch normal from normalMap
NormalTexCoordTemp.x = NormalTexCoord.x - fraction;
NormalTexCoordTemp.y = NormalTexCoord.y + 0.1;  //fetch and add normal from same normalMap but another direction
normalAnimMapColor.rg = (normalAnimMapColor.rg + tex2D(nmap, NormalTexCoordTemp) -1 ) * 2;
normalAnimMapColor.b = 1;  	


   float3 reflVec = normalize( reflect(ViewVec, normalAnimMapColor.rgb ));
   float4  sky = texCUBE(skyCube, reflVec.xyz);

   float f = tex1D(fresnel,dot(reflVec,Norm));


//ScreenTexCoord.y = -ScreenTexCoord.y ;//for debug texture flip bug in BS Contact 6.207

float4 refl = tex2D(reflmap, ScreenTexCoord.xy /ScreenTexCoord.z + 0.5 - normalAnimMapColor.rg * disturbingScale) ;
refl =max (0, pow(sky.g,8)-0.5)+ lerp(sky, refl,refl.a);//
float4 refr = tex2D(refrmap, ScreenTexCoord.xy /ScreenTexCoord.z + 0.5 + normalAnimMapColor.rg * disturbingScale) ;

 
return lerp(refr,refl, f);


}

technique WaterRTT
{
    pass P0
    {
//	CullMode = None;
    // 	CullMode = CW;
    // 	CullMode = D3DCULL_CCW;
 VertexShader = compile vs_2_0 VS();
  PixelShader  = compile ps_2_0 PS();
    		//ZWriteEnable = false;
		//CullMode = None;
	//	NormalizeNormals = true;
	//	LocalViewer = true;
     //   SrcBlend = SrcAlpha;
    //    DestBlend = InvSrcAlpha;
   //    AlphaBlendEnable = true;
   // ZWRITEENABLE = TRUE;
   ////   SRCBLEND = SRCALPHA;
    ////  DESTBLEND = INVSRCALPHA;
    // CULLMODE = CCW;
  ////    ALPHABLENDENABLE = TRUE;
    }  
}