struct VertexOut
{
	float4 Position				:POSITION;
	float4 Color				:COLOR0;
	float2 TexCoord				:TEXCOORD;
	float error					:TEXCOORD1;
	float ID					:TEXCOORD2;
	float PSize					:PSIZE;
};


VertexOut VertexProgram(
		  float4 Position   : POSITION,
          float2 TexCoord			: TEXCOORD0,
          float4 Color		: COLOR0,  
          uniform float Opacity,       			
          uniform float4 PSize : state.point.size,
          uniform float4x4 modelView : state.matrix.modelview,
          uniform float4x4 modelViewProj:state.matrix.mvp			
          )
{
	VertexOut Out;
	Out.ID=TexCoord.x;
	Out.Color=Color;
	Out.Color.a=Opacity;
	 
   float4 pos_eye = mul(modelView, Position);
    float dist = length(pos_eye.xyz);
    Out.PSize =PSize.x*TexCoord.y*sqrt(1.0 / (1 + dist*dist));
		
	Out.Position = mul(modelViewProj, Position);    
	
    return Out;
}

float4 FragmentProgram(VertexOut In,
					uniform sampler2D BbTexture,					
					uniform samplerRECT IllumTex
					) : COLOR
{
/*
		float ds=texRECT(VisMap,float2(particle,direction)).g;
		float tau=1.0;
		//float alpha=1-exp(-ds*tau);
		float alpha=Alb_Op.y;*/
						
		int particle=round(In.ID);
			
		float4 Color=texRECT(IllumTex,float2(particle,0))*In.Color;
				
		Color.a*=tex2D(BbTexture, In.TexCoord.xy).r;
		//Color.a=1;
		
		return  Color;        
}

/*
float4 FragmentProgram(VertexOut In,
					uniform samplerRECT LVisMap,
					uniform sampler2D BbTexture,
					uniform float Ldir
					) : COLOR
{
					
		int particle=round(In.ID);
			
		float4 Color=texRECT(LVisMap,float2(particle,Ldir));
				
		Color.a*=tex2D(BbTexture, In.TexCoord.xy).r;
		
		return  Color;
   
   
        
}*/