[AS3]as3实现长方形的转动效果源代码实例

[AS3]as3实现长方形的转动效果源代码实例

package  
{ 
    import flash.display.Sprite; 
    import flash.events.MouseEvent; 
    import flash.display.MovieClip; 
    import flash.events.Event; 
    import flash.utils.Timer; 
    import flash.events.TimerEvent; 
 
    public class Main extends Sprite 
    { 
        private var rect_mc:MovieClip = null; 
        private var circle_mc:MovieClip = null; 
        private var array1:Array=new Array( 
        {m_x:275,m_y:100},{m_x:325,m_y:113.4},{m_x:361.6,m_y:150} 
        ,{m_x:375,m_y:200},{m_x:361.6,m_y:250},{m_x:325,m_y:286.6} 
        ,{m_x:275,m_y:300},{m_x:225,m_y:286.6},{m_x:188.4,m_y:250} 
        ,{m_x:175,m_y:200},{m_x:188.4,m_y:150},{m_x:225,m_y:113.4}); 
        private var counter:Number = 0; 
        public function Main() 
        { 
            /*圆，圆画在元件上默认圆心坐标(0,0) 
            也就是说圆心和元件中心重合*/ 
            circle_mc=new MovieClip(); 
            var circle_s:Sprite=new Sprite(); 
            with (circle_s) 
            { 
                graphics.lineStyle(5,0x000000); 
                graphics.drawCircle(0,0,100); 
            } 
            circle_mc.addChild(circle_s); 
            circle_mc.x = stage.stageWidth / 2; 
            circle_mc.y = stage.stageHeight / 2; 
            stage.addChild(circle_mc); 
            /*长方形，长方形画在元件上默认左上角坐标(0,0) 
            也就是说长方形左上角和元件中心重合*/ 
            rect_mc=new MovieClip(); 
            var rect_s:Sprite=new Sprite(); 
            with (rect_s) 
            { 
                graphics.lineStyle(2,0x000000); 
                graphics.beginFill(0x000000); 
                graphics.drawRect(0,0,10,50); 
                graphics.endFill(); 
            } 
            /*将长方形的“下边中心”和元件的中心重合 
            这样在旋转长方形的时候就会以“下边中心”为基点*/ 
            rect_s.x = -5; 
            rect_s.y = -50; 
            rect_mc.addChild(rect_s); 
            rect_mc.x = stage.stageWidth / 2; 
            rect_mc.y = stage.stageHeight / 2; 
            stage.addChild(rect_mc); 
            var timer:Timer = new Timer(1000,12); 
            timer.addEventListener(TimerEvent.TIMER,rectangleRotating); 
            timer.start(); 
        } 
        //长方形旋转 
        private function rectangleRotating(e:TimerEvent):void 
        { 
            var angle1:Number = getAngleBy2Points(rect_mc.x,rect_mc.y,array1[counter].m_x,array1[counter].m_y); 
            trace(angle1); 
            rect_mc.rotation = angle1; 
            counter++; 
        } 
        /*获取长方形元件的中心点与鼠标点击点连线和长方形的角度 
        x1代表中心点的X坐标 
        y1代表中心点的Y坐标 
        x2代表鼠标点的X坐标 
        y2代表鼠标垫的Y坐标*/ 
        private function getAngleBy2Points(x1:Number,y1:Number,x2:Number,y2:Number):Number 
        { 
            //获取长方形元件的中心点与鼠标点击点连线和长方形的弧度 
            var radian1:Number=Math.atan((x2-x1)/(y1-y2)); 
            //根据弧度获取角度 
            var angle1:Number=radian1/(Math.PI/180); 
            if (x2 >= x1) 
            { 
                if (y2 <= y1) 
                { 
                    angle1angle1 = angle1; 
                } 
                else 
                { 
                    angle1 +=  180; 
                } 
            } 
            else 
            { 
                if (y2 > y1) 
                { 
                    angle1 +=  180; 
                } 
                else 
                { 
                    angle1 +=  360; 
                } 
            } 
            return angle1; 
        } 
    } 
}