BONKURA BLOG

対象物への距離が分かっている場合に、その対象物との角度を調べる

package 
{
	import flash.display.Sprite;
	import flash.events.Event;
	
	public class RotateToMouse extends Sprite 
	{
		private var arrow:Arrow;
		
		public function RotateToMouse()
		{
			init();
		}
		
		private function init():void
		{
			arrow = new Arrow();
			addChild(arrow);
			arrow.x = stage.stageWidth / 2;
			arrow.y = stage.stageHeight / 2;
			addEventListener(Event.ENTER_FRAME, onEnterFrame);
		}
		
		private function onEnterFrame(e:Event):void 
		{
			var dx:Number = mouseX - arrow.x;
			var dy:Number = mouseY - arrow.y;
			var radius:Number = Math.atan2(dy, dx);
			arrow.rotation = radius * 180 / Math.PI;
		}
	}
	
}

繰り返し運動

package 
{
	import flash.display.Sprite;
	import flash.events.Event;
	
	public class  Bobbing extends Sprite
	{
		private var ball:Ball;
		private var angle:Number = 0;
		
		public function Bobbing()
		{
			init();
		}
		
		private function init():void
		{
			ball = new Ball();
			addChild(ball);
			ball.x = stage.stageWidth / 2;
			addEventListener(Event.ENTER_FRAME, onEnterFrame);
		}
		
		private function onEnterFrame(e:Event):void 
		{
			ball.y = stage.stageHeight / 2 + Math.sin(angle) * 50;
			angle += .1;
		}
	}
	
}

package 
{
	import flash.display.Sprite;
	import flash.events.Event;
	
	public class Pulse extends Sprite
	{
		private var ball:Ball;
		private var angle:Number = 0
		private var range:Number = .5;
		private var speed:Number = .1;
		private var centerScale:Number = 1;
		
		public function Pulse()
		{
			init();
		}
		
		private function init():void
		{
			ball = new Ball();
			addChild(ball);
			ball.x = stage.stageWidth / 2;
			ball.y = stage.stageHeight / 2;
			addEventListener(Event.ENTER_FRAME, onEnterframe);
		}
		
		private function onEnterframe(e:Event):void 
		{
			ball.scaleX = ball.scaleY = centerScale + Math.sin(angle) * range;
			angle += speed;
		}
	}
	
}

楕円運動

package 
{
	import flash.display.Sprite;
	import flash.events.Event;
	
	public class Oval extends Sprite 
	{
		private var ball:Ball;
		private var centerX:Number = 200;
		private var centerY:Number = 200;
		private var radiusX:Number = 200;
		private var radiusY:Number = 100;
		private var speed:Number = .1;
		private var angle:Number = 0;
		
		public function Oval()
		{
			init();
		}
		
		private function init():void
		{
			ball = new Ball();
			addChild(ball);
			ball.x = 0;
			addEventListener(Event.ENTER_FRAME, onEnterFrame);
		}
		
		private function onEnterFrame(e:Event):void 
		{
			ball.x = centerX + Math.sin(angle) * radiusX;
			ball.y = centerY +Math.cos(angle) * radiusY;
			trace(ball.y);
			angle += speed;
		}
	}
	
}

二点間の距離

package 
{
	import flash.display.Sprite;
	import flash.events.MouseEvent;
	import flash.text.TextField;
	
	public class MouseDistance extends Sprite 
	{
		private var sprite1:Sprite;
		private var textFiteld:TextField;
		
		public function MouseDistance()
		{
			init();
		}
		
		private function init():void
		{
			sprite1 = new Sprite();
			addChild(sprite1);
			sprite1.graphics.beginFill(0x000000);
			sprite1.graphics.drawRect( -2, -2, 4, 4);
			sprite1.graphics.endFill();
			sprite1.x = stage.stageWidth / 2;
			sprite1.y = stage.stageHeight / 2;
			
			textFiteld = new TextField();
			addChild(textFiteld);
			stage.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
		}
		
		private function onMouseMove(e:MouseEvent):void 
		{
			graphics.clear();
			graphics.lineStyle(1, 0, 1);
			graphics.moveTo(sprite1.x, sprite1.y);
			graphics.lineTo(mouseX, mouseY);
			
			var dx:Number = sprite1.x - mouseX;
			var dy:Number = sprite1.y - mouseY;
			var dist:Number = Math.sqrt(dx * dx + dy * dy);
			textFiteld.text = String(dist);
		}
	}
	
}