if ( !point._is_valid() )
  {
    return false;
  }

  VMatrix   worldToScreen = valve_games_interfaces::m_pEngine->WorldToScreenMatrix();
  out2D.x = worldToScreen[0][0] * point.x + worldToScreen[0][1] * point.y + worldToScreen[0][2] * point.z + worldToScreen[0][3];
  out2D.y = worldToScreen[1][0] * point.x + worldToScreen[1][1] * point.y + worldToScreen[1][2] * point.z + worldToScreen[1][3];
  out2D.z = worldToScreen[3][0] * point.x + worldToScreen[3][1] * point.y + worldToScreen[3][2] * point.z + worldToScreen[3][3];
  if ( !out2D._is_valid() )
  {
    return false;
  }

  float w = out2D.z;
  out2D.z = 0.0f;

//   bool behind = false;

  if( w < 0.01f )
  {
    return false;
//     behind = true;
//     out2D.x *= 100000;
//     out2D.y *= 100000;
  }
  else
  {
//     behind = false;
    float invw = 1.0f / w;
    out2D.x *= invw;
    out2D.y *= invw;

    if ( !out2D._is_valid() )
    {
      return false;
    }
  }

  float x = float(m_pExport->m_iWidth  >> 1);
  float y = float(m_pExport->m_iHeight >> 1);

  x += 0.5 * out2D.x * m_pExport->m_iWidth  + 0.5;
  y -= 0.5 * out2D.y * m_pExport->m_iHeight + 0.5;

  //dont render out of screen
  if( x > m_pExport->m_iWidth  ||
    x < 0 ||
    y > m_pExport->m_iHeight ||
    y < 0 )
    return false;

  out2D._init(x,y,0);

  if ( !out2D._is_valid() )
  {
    return false;
  }

  return true;