//Flashで作る3Dのお勉強8
//stageをクリックするとプレートがY軸に一回転して止まるように。コードが冗長…。
package 
{
	import flash.display.Sprite;
	import flash.events.*;
	
	[SWF(backgroundColor=0xffffff, frameRate=60)]
	public class Lines3D2 extends Sprite 
	{
		private var points:Array;
		private var numPoints:int = 4;
		private var fl:Number = 250;
		private var vpX:Number = stage.stageWidth / 2;
		private var vpY:Number = stage.stageHeight / 2;
		
		public function Lines3D2() {
			init();
		}
		
		private function init():void {
			points = new Array();
			points[0] = new Point3D( -100, -100, 0);
			points[1] = new Point3D(  100, -100, 0);
			points[2] = new Point3D(  100,  100, 0);
			points[3] = new Point3D( -100,  100, 0);
			for (var i:int = 0; i < numPoints; i++) {
				points[i].setVanishingPoint(vpX, vpY);
				points[i].setCenter(0, 0, 200);
			}
			addEventListener(Event.ENTER_FRAME, enterFrameHandler);
			stage.addEventListener(MouseEvent.CLICK, enterRotateY);
		}
		
		private function enterFrameHandler(e:Event):void {
			
			graphics.clear();
			graphics.lineStyle(0);
			graphics.moveTo(points[0].screenX, points[0].screenY);
			for (var i:int = 1; i < numPoints; i++) {
				graphics.lineTo(points[i].screenX, points[i].screenY);
			}
			graphics.lineTo(points[0].screenX, points[0].screenY);
		}
		
		private function enterRotateY(e:MouseEvent):void {
			addEventListener(Event.ENTER_FRAME, rotateY1);
		}
		
		private function rotateY1(e:Event):void {
			var angleY:Number = 5*Math.PI/180;
			for (var i:int = 0; i < numPoints; i++) {
				var point:Point3D = points[i];
				point.rotateY(angleY);
			}
			if (point.rotationY > Math.PI-angleY) {
				var sabun:Number = point.rotationY - Math.PI;
				for (i = 0; i < numPoints; i++) {
					point = points[i];
					point.rotateY(sabun);
				}
				removeEventListener(Event.ENTER_FRAME, rotateY1);
				point.rotationY = 0;
				return;
			}
			trace(point.rotationY);
		}
	}
	
}
class Point3D 
	{
		public var fl:Number = 250;
		public var _rotationY:Number = 0;
		private var vpX:Number = 0;
		private var vpY:Number = 0;
		private var cX:Number = 0;
		private var cY:Number = 0;
		private var cZ:Number = 0;
		private var x:Number = 0;
		private var y:Number = 0;
		private var z:Number = 0;
		
		public function Point3D(x:Number = 0, y:Number = 0, z:Number = 0) {
			this.x = x;
			this.y = y;
			this.z = z;
		}
		
		public function setVanishingPoint(vpX:Number, vpY:Number):void {
			this.vpX = vpX;
			this.vpY = vpY;
		}
		
		public function setCenter(cX:Number, cY:Number, cZ:Number = 0):void {
			this.cX = cX;
			this.cY = cY;
			this.cZ = cZ;
		}
		
		public function get screenX():Number {
			var scale:Number = fl / (fl + z + cZ);
			return vpX + cX + x * scale;
		}
		
		public function get screenY():Number {
			var scale:Number = fl / (fl + z + cZ);
			return vpY + cY + y * scale;
		}
		
		public function get rotationY():Number {
			return _rotationY;
		}
		
		public function set rotationY(angleY:Number):void {
			_rotationY = angleY;
		}
		
		public function rotateX(angleX:Number):void {
			var cosX:Number = Math.cos(angleX);
			var sinX:Number = Math.sin(angleX);
			
			var y1:Number = y * cosX - z * sinX;
			var z1:Number = z * cosX + y * sinX;
			
			y = y1;
			z = z1;
		}
		
		public function rotateY(angleY:Number):void {
			var cosY:Number = Math.cos(angleY);
			var sinY:Number = Math.sin(angleY);
			
			var x1:Number = x * cosY - z * sinY;
			var z1:Number = z * cosY + x * sinY;
			
			x = x1;
			z = z1;
			_rotationY += angleY;
		}
		
		public function rotateZ(angleZ:Number):void {
			var cosZ:Number = Math.cos(angleZ);
			var sinZ:Number = Math.sin(angleZ);
			
			var x1:Number = x * cosZ - y * sinZ;
			var y1:Number = y * cosZ + x * sinZ;
			
			x = x1;
			y = y1;
		}
	}