package {
          import flash.display.Sprite;
          import flash.display.StageAlign;
          import flash.display.StageScaleMode;
          import flash.events.Event;
  
          public class @ax-animation-ch16-Pyramid extends Sprite
          {
                  private var points:Array;
                  private var triangles:Array;
                  private var fl:Number = 250;
                  private var vpX:Number = stage.stageWidth / 2;
                  private var vpY:Number = stage.stageHeight / 2;
                  
                  public function @ax-animation-ch16-Pyramid()
                  {
                          init();
                  }
                  
                  private function init():void
                  {
                          stage.align = StageAlign.TOP_LEFT;
                          stage.scaleMode = StageScaleMode.NO_SCALE;
                          
                          points = new Array();
                          points[0] = new animation_ch16_Point3D(   0, -200,    0);
                          points[1] = new animation_ch16_Point3D( 200,  200, -200);
                          points[2] = new animation_ch16_Point3D(-200,  200, -200);
                          points[3] = new animation_ch16_Point3D(-200,  200,  200);
                          points[4] = new animation_ch16_Point3D( 200,  200,  200);
                          for(var i:uint = 0; i < points.length; i++)
                          {
                                  points[i].setVanishingPoint(vpX, vpY);
                                  points[i].setCenter(0, 0, 200);
                          }
                          
                          triangles = new Array();
                          triangles[0] = new animation_ch16_Triangle(points[0], points[1], points[2], 0x6666cc);
                          triangles[1] = new animation_ch16_Triangle(points[0], points[2], points[3], 0x66cc66);
                          triangles[2] = new animation_ch16_Triangle(points[0], points[3], points[4], 0xcc6666);
                          triangles[3] = new animation_ch16_Triangle(points[0], points[4], points[1], 0x66cccc);
                          triangles[4] = new animation_ch16_Triangle(points[1], points[3], points[2], 0xcc66cc);
                          triangles[5] = new animation_ch16_Triangle(points[1], points[4], points[3], 0xcc66cc);
                          addEventListener(Event.ENTER_FRAME, onEnterFrame);
                  }
                  
                  private function onEnterFrame(event:Event):void
                  {
                          var angleX:Number = (mouseY - vpY) * .001;
                          var angleY:Number = (mouseX - vpX) * .001;
                          for(var i:uint = 0; i < points.length; i++)
                          {
                                  var point:animation_ch16_Point3D = points[i];
                                  point.rotateX(angleX);
                                  point.rotateY(angleY);
                          }
                          
                          graphics.clear();
                          for(i = 0; i < triangles.length; i++)
                          {
                                  triangles[i].draw(graphics);
                          }
                  }
          }
  }