struct ZVertexToPixel
{
	float4 Position     : POSITION;    
	float4 Position2D    : TEXCOORD0;
};

struct ZPixelToFrame
{
	float4 Color : COLOR0;
};

struct AOVertexToPixel
{
	float4 Position     : POSITION;    
	float4 Position2D    : TEXCOORD0;
};

struct AOPixelToFrame
{
	float4 Color : COLOR0;
};

float4x4 xViewProjection;
Texture xFrame;
Texture xRand;
float xMaxDepth=40.0f;


sampler ColoredTextureSampler = sampler_state { texture = <xFrame> ; magfilter 

= POINT; minfilter = POINT; mipfilter=POINT; AddressU = mirror; AddressV = 

mirror;};

sampler Rand = sampler_state { texture = <xRand> ; magfilter = POINT; 

minfilter = POINT; mipfilter=POINT; AddressU = mirror; AddressV = mirror;};

ZVertexToPixel Z_VS( float4 inPos : POSITION)
{
	ZVertexToPixel Output = (ZVertexToPixel)0;
	Output.Position = mul(inPos, xViewProjection);
	Output.Position2D = Output.Position;

	return Output;    
}

ZPixelToFrame Z_PS(ZVertexToPixel PSIn)
{
	ZPixelToFrame Output = (ZPixelToFrame)0;

	Output.Color = PSIn.Position2D.w/xMaxDepth;

	return Output;
}

AOVertexToPixel AO_VS( float4 inPos : POSITION)
{
	AOVertexToPixel Output = (AOVertexToPixel)0;
	Output.Position = mul(inPos, xViewProjection);
	Output.Position2D = Output.Position;

	return Output;    
}

AOPixelToFrame AO_PS(AOVertexToPixel PSIn)
{
	AOPixelToFrame Output = (AOPixelToFrame)0;
	float2 ProjectedTexCoords;
	ProjectedTexCoords.x = PSIn.Position2D.x/PSIn.Position2D.w/2.0f +0.5f;
	ProjectedTexCoords.y= -PSIn.Position2D.y/PSIn.Position2D.w/2.0f +0.5f;
	float4 Temp=0;
	int i;
	int j;
	float2 Temp2;
	Temp2=ProjectedTexCoords;

	float4 b=tex2D(ColoredTextureSampler,ProjectedTexCoords);

	//With preset Radius
	for(i=-1;i<2;i++)
	{
		for(j=-1;j<2;j++)
		{
			Temp2.y+=i*fmod(tex2D(Rand,ProjectedTexCoords+i*cos(i)*0.233),0.04);
			Temp2.x+=j*fmod(tex2D(Rand,ProjectedTexCoords+i/sin(j*0.3455)),0.04);
			float a=length(b)-(length(tex2D(ColoredTextureSampler,Temp2)));
			if(a>0.001&&a<0.27)
				Temp+=b-tex2D(ColoredTextureSampler,Temp2);
		}

	}
	Temp2=ProjectedTexCoords;

	//With double of Preset Radius
	for(i=-1;i<2;i++)
	{
		for(j=-1;j<2;j++)
		{
			Temp2.y+=2*i*fmod(tex2D(Rand,ProjectedTexCoords+i*cos(i)*0.233),0.04);
			Temp2.x+=2*j*fmod(tex2D(Rand,ProjectedTexCoords+i/sin(j*0.3455)),0.04);
			float a=length(b)-(length(tex2D(ColoredTextureSampler,Temp2)));
			if(a>0.002&&a<0.4)
				Temp+=b-tex2D(ColoredTextureSampler,Temp2);
		}

	}

	Output.Color = 1-Temp/1.4;
	return Output;
}



technique RTAO
{
	pass Pass0
	{
		VertexShader = compile vs_3_0 Z_VS();
		PixelShader = compile ps_3_0 Z_PS();
	}
	pass Pass1
	{
		VertexShader = compile vs_3_0 AO_VS();
		PixelShader = compile ps_3_0 AO_PS();
	}

}