Source/System/Cluster/Window/SortFirst/OSGTileLoadBalancer.inl

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  36
  37 OSG_BEGIN_NAMESPACE
  38
  39 /** Constructor
  40  **/
  41 inline
  42 TileLoadBalancer::RegionLoad::RegionLoad(TileGeometryLoad *load):
  43     _visibleFaces  (0.f ),
  44     _invisibleFaces(0.f ),
  45     _pixel         (0.f ),
  46     _load          (load)
  47 {
  48 }
  49
  50 /** Update region dependent values
  51  **/
  52 inline
  53 void TileLoadBalancer::RegionLoad::updateCost(const Int32 wmin[2],
  54                                               const Int32 wmax[2])
  55 {
  56     Real32 faces  =Real32(_load->getFaces());
  57     Real32 visible;
  58     Int32 vismin[2];
  59     Int32 vismax[2];
  60
  61     visible=_load->getVisibleFraction(wmin,wmax,vismin,vismax);
  62     if(visible)
  63     {
  64         _visibleFaces=faces*visible;
  65         _invisibleFaces=faces-_visibleFaces;
  66         _pixel=Real32(
  67             (vismax[0] - vismin[0] + 1)*
  68             (vismax[1] - vismin[1] + 1));
  69     }
  70     else
  71     {
  72         _pixel=0;
  73         _invisibleFaces=0;
  74         _visibleFaces=0;
  75     }
  76 }
  77
  78 /** Calculate the rendering cost
  79  *
  80  * \param renderNode  Node to render the geometry
  81  **/
  82
  83 inline
  84 Real32 TileLoadBalancer::RegionLoad::getCost(const RenderNode &renderNode)
  85 {
  86     return renderNode.estimatePerformance(_invisibleFaces,
  87                                           _visibleFaces,
  88                                           _pixel);
  89 }
  90
  91 /** Calculate the rendering cost for the given region
  92  *
  93  * \param renderNode  Node to render the geometry
  94  * \param wmin        bottom, left corner of the area
  95  * \param wmax        top, right corner of the area
  96  **/
  97
  98 inline
  99 Real32 TileLoadBalancer::RegionLoad::getCost(const RenderNode &renderNode,
 100                                              const Int32 wmin[2],
 101                                              const Int32 wmax[2]) const
 102 {
 103     Int32 vismin[2];
 104     Int32 vismax[2];
 105     Real32 visibleFaces;
 106     Real32 invisibleFaces;
 107     Real32 visible;
 108
 109     Real32 faces  =Real32(_load->getFaces());
 110     visible=_load->getVisibleFraction(wmin,wmax,vismin,vismax);
 111     if(visible==0.0)
 112         return 0.0;
 113     visibleFaces=faces*visible;
 114     invisibleFaces=faces-visibleFaces;
 115     Real32 pixel=Real32(
 116         (vismax[0] - vismin[0] + 1)*
 117         (vismax[1] - vismin[1] + 1));
 118     return renderNode.estimatePerformance(invisibleFaces,
 119                                           visibleFaces,
 120                                           pixel);
 121 }
 122
 123 /** Return gemetry load info object
 124  **/
 125 inline
 126 TileGeometryLoad * TileLoadBalancer::RegionLoad::getLoad(void)
 127 {
 128     return _load;
 129 }
 130
 131 OSG_END_NAMESPACE