Method _renderCellBounds

Engine/source/forest/forestRender.cpp:265–323

void Forest::_renderCellBounds( ObjectRenderInst *ri, SceneRenderState *state, BaseMatInstance *overrideMat )
{
   PROFILE_SCOPE( Forest_RenderCellBounds );

   if ( overrideMat )
      return;

   GFXTransformSaver saver;

   MatrixF projBias(true);
   const Frustum frustum = GFX->getFrustum();
   MathUtils::getZBiasProjectionMatrix( 0.001f, frustum, &projBias );
   GFX->setProjectionMatrix( projBias );

   VectorF extents;
   Point3F pos;

   // Get top level cells
   Vector<ForestCell*> cellStack;
   mData->getCells( &cellStack );

   // Holds child cells we need to render as we encounter them.
   Vector<ForestCell*> frontier;   
   
   GFXDrawUtil *drawer = GFX->getDrawUtil();

   GFXStateBlockDesc desc;
   desc.setZReadWrite( true, false );
   desc.setBlend( true );
   desc.setFillModeWireframe();

   while ( !cellStack.empty() )
   {
      while ( !cellStack.empty() )
      {      
         const ForestCell *cell = cellStack.last();
         cellStack.pop_back();
         
         Box3F box = cell->getBounds();

         drawer->drawCube( desc, box, ColorI( 0, 255, 0 ) );

         RectF rect = cell->getRect();

         box.minExtents.set( rect.point.x, rect.point.y, box.minExtents.z );
         box.maxExtents.set( rect.point.x + rect.extent.x, rect.point.y + rect.extent.y, box.minExtents.z );         

         drawer->drawCube( desc, box, ColorI::RED );

         // If this cell has children, add them to the frontier.
         if ( !cell->isLeaf() )      
            cell->getChildren( &frontier );      
      }

      // Now the frontier becomes the cellStack and we empty the frontier.
      cellStack = frontier;
      frontier.clear();
   }