?? rectangletriangleculler.as
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package org.papervision3d.core.culling { import flash.geom.Rectangle; import org.papervision3d.core.geom.renderables.Triangle3D; import org.papervision3d.core.geom.renderables.Vertex3DInstance; public class 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 * * RectangleTriangleCuller * * This Triangle Culler culls faces based upon the visibility of it vertices and their visibility in a defined rectangle. */ public function 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 cullingRectangle.intersects(hitRect); } return false; } }}?? 快捷鍵說明
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