// gametools
#include \
    <levelutil/shader/prog/d3d9_hlsl/include_stddef_d3d9_hlsl.s3d_shadercode_run>


struct VS_INPUT
{
    float2 texCoord : TEXCOORD0;
    float4 posObj: POSITION;   
};

struct VS_OUTPUT
{
    float4 posScr: POSITION;
    float2 center: TEXCOORD0;
    float pointSize: PSIZE;
    float radius :TEXCOORD1;
    float4 color :TEXCOORD2;
    
};


///////////////////////////////////////////////////////////////////////////////
// Vertexshader
// Profile: 3x0
const float4x4 projMat;
const float4x4 matView;
const float4x4 matViewInv;
sampler tex0: register(s0);

VS_OUTPUT main(VS_INPUT input)
{
    float pointSize = 40;
    float resolution = 128;
    
    VS_OUTPUT output = (VS_OUTPUT)0;

    output.pointSize = pointSize;    
    output.radius = pointSize / resolution;
    
   float4 pos = tex2Dlod(tex0, float4(input.posObj.x, input.posObj.y,0,0));
   
   //debug
   //output.posScr = float4(input.posObj.xy *2.0 - 1.0, 0, 1);
   
  //output.posScr = pos;
  output.center = output.posScr;  
  
  //output.color = float4(1,0,1,1);
   if(pos.w == 0)
   {
        output.center = 0.0f;
        output.posScr = 1000.0f; //transform out of view
   }
   else
   {
        float4 mPosition = float4(normalize(pos.xyz),1); 
        float4 cPosition = mul(mPosition, matView);
        float4 hPosition = mul(cPosition, projMat); 

        output.posScr = hPosition;  
        output.center = float2(hPosition.x, hPosition.y) / hPosition.w;
   }
   
    
  
    
   return output;
}

///////////////////////////////////////////////////////////////////////////////