package org.papervision3d.core.culling {
          
          import org.papervision3d.core.geom.renderables.Particle;
          import org.papervision3d.core.geom.renderables.Vertex3DInstance;
          import org.papervision3d.core.geom.renderables.Vertex3D;        
          import flash.geom.Rectangle;
          import flash.geom.Point;
          import org.papervision3d.core.math.util.FastRectangleTools;        
  
          
          public class @ax-student-ar-org-papervision3d-core-culling-RectangleParticleCuller implements IParticleCuller
          {
                  private static var vInstance:Vertex3DInstance;
                  private static var testPoint:Point;
                  
                  public var cullingRectangle:Rectangle;
                  
                  public function @ax-student-ar-org-papervision3d-core-culling-RectangleParticleCuller(cullingRectangle:Rectangle = null)
                  {
                          this.cullingRectangle = cullingRectangle;
                          testPoint = new Point();
                  }
                  
                  public function testParticle(particle:Particle):Boolean
                  {
                          vInstance = particle.vertex3D.vertex3DInstance;
                          
                          
                          // TODO I don't trust the speed of the built-in Rectangle.intersects function - 
                          // and have a fast algorithm so I'll write a new intersect function! [Seb]
                          if(particle.material.invisible == false){
                                  if(vInstance.visible)
                                  {
                                          if(FastRectangleTools.intersects(particle.renderRect, cullingRectangle))
                                          {
                                                  return true; 
                                          }
                                  }
                          }
                          return false;
                  }
                  
                  
                  
          }
  }