topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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student-ar-org-papervision3d-core-culling-RectangleTriangleCuller.ax

student-ar-org-papervision3d-core-culling-RectangleTriangleCuller.ax [swf] [flash] flex 


  package org.papervision3d.core.culling {
          
          import flash.geom.Rectangle;
          
          import org.papervision3d.core.geom.renderables.Triangle3D;
          import org.papervision3d.core.geom.renderables.Vertex3DInstance;        
          import org.papervision3d.core.math.util.FastRectangleTools;        
  
          public class @ax-student-ar-org-papervision3d-core-culling-RectangleTriangleCuller extends DefaultTriangleCuller implements ITriangleCuller
          {
                  
                  private static const DEFAULT_RECT_W:Number = 640;
                  private static const DEFAULT_RECT_H:Number = 480;
                  private static const DEFAULT_RECT_X:Number = -(DEFAULT_RECT_W/2);
                  private static const DEFAULT_RECT_Y:Number = -(DEFAULT_RECT_H/2);
                  
                  private static var hitRect:Rectangle = new Rectangle();
                  
                  public var cullingRectangle:Rectangle = new Rectangle(DEFAULT_RECT_X, DEFAULT_RECT_Y, DEFAULT_RECT_W, DEFAULT_RECT_H);
@Author Ralph Hauwert @ax-student-ar-org-papervision3d-core-culling-RectangleTriangleCuller This Triangle Culler culls faces based upon the visibility of it vertices and their visibility in a defined rectangle. 

  
                  public function @ax-student-ar-org-papervision3d-core-culling-RectangleTriangleCuller(cullingRectangle:Rectangle = null):void
                  {
                          if(cullingRectangle){
                                  this.cullingRectangle = cullingRectangle;        
                          }
                  }
                  
                  override public function testFace(face:Triangle3D, vertex0:Vertex3DInstance, vertex1:Vertex3DInstance, vertex2:Vertex3DInstance):Boolean
                  {
                          if(super.testFace(face, vertex0, vertex1, vertex2)){
                                  hitRect.x = Math.min(vertex2.x, Math.min(vertex1.x, vertex0.x));
                                  hitRect.width = Math.max(vertex2.x, Math.max(vertex1.x, vertex0.x)) + Math.abs(hitRect.x);
                                  hitRect.y = Math.min(vertex2.y, Math.min(vertex1.y, vertex0.y));
                                  hitRect.height = Math.max(vertex2.y, Math.max(vertex1.y, vertex0.y)) + Math.abs(hitRect.y);
                                  return FastRectangleTools.intersects(cullingRectangle,hitRect);        
                          }
                          return false;
                  }
                  
          }
  }
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 04/09/2009

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