source: nanovis/branches/1.2/shaders/pointsvp.cg @ 5472

/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 * Copyright (c) 2004-2013  HUBzero Foundation, LLC
 *
 * Authors:
 *   Wei Qiao <qiaow@purdue.edu>
 */

void main(in float4 posin : POSITION,
          in float4 colin : COLOR0,
          out float psize : PSIZE,
          out float4 posout : POSITION,
          out float4 colout : COLOR0,
          uniform float atten,
          /*uniform sampler2D normal,*/
          uniform float4 posoffset,
          uniform float4 basepos,
          uniform float4 scale,         
          uniform float4x4 modelView,
          uniform float4x4 modelViewProj)
{
    float4 vec, homeye, eye;
    vec.xyz = posin.xyz;
    vec.w = 1.0;
    homeye = mul(modelView, vec);
    posout = mul(modelViewProj, posin);

    float4 p = mul(modelView, vec);
    //psize = scale.x   *(p.w / -p.z) * 10;

    //psize = 5 * scale.x;
    //psize = 2 * p.w / -p.z;
    //colout = float4(colin.xyz,0.1);

    //  float tmp = posin.w * rsqrt(dot(eye.xyz, eye.xyz));
    //  psize = scale.x * max(tmp, 1.0);
    psize = 10 * p.w / -p.z;

    colout = float4(colin.xyz, colin.w * 0.25);
    /*
      float4 vec, homeye, eye;
      float tmp;

      vec.xyz = posin.xyz;//(posin.xyz + posoffset.www) * basepos.www + basepos.xyz;
      vec.w = 1.0;

      homeye = mul(modelView, vec);
      posout = mul(modelViewProj, posin);

      //eye = homeye / homeye.w;

      //tmp = posin.w * basepos.w * scale.w * rsqrt(atten * dot(eye.xyz, eye.xyz));

      //psize = scale.x * max(tmp, 1.0);
      //tmp = min(tmp, 1.0);
      //colout = colin;
      //tmp = colin.w * scale.z * tmp * tmp;
      //colout.w = max(tmp, 4.0/256);

      psize = 5.0;

      colout = float4(0.0, 0.0, 1.0, 0.1);
    */  
}