Laya 屏幕聚焦

Laya 屏幕聚焦

@author ixenos 2020-05-13 12:15:08

        /**
         * 屏幕聚焦到指定点位
         * @param aimX 地图中的x坐标
         * @param aimY 地图中的y坐标
         * @param scaleN 缩放倍数
         * 
         */
        public function focusOn(aimX:Number,aimY:Number,scaleN:Number,useTween:Boolean,tweenDuration:Number):void{
            Tween.clearAll(_focusBox);
            
            //坐标转化
            var p:Point = _cameraBox.localToGlobal(new Point(aimX,aimY));
            p = _focusBox.globalToLocal(p);
            
            //设定聚焦锚点
            _focusBox.anchorX = p.x/_focusBox.width;
            _focusBox.anchorY = p.y/_focusBox.height;
            
            //调整偏移量
//            _focusBox.x = _focusBox.width*_focusBox.anchorX;
//            _focusBox.y = _focusBox.height*_focusBox.anchorY;
            _focusBox.x = p.x;
            _focusBox.y = p.y;
            
            //聚焦
            if(useTween){
                Tween.to(_focusBox,{scaleX:scaleN,scaleY:scaleN},tweenDuration);
            }else{
                _focusBox.scale(scaleN,scaleN,true);                
            }
        }
        
        /**
         * 取消屏幕聚焦
         * @param useTween
         * @param tweenDuration
         * 
         */
        public function focusOff(useTween:Boolean,tweenDuration:Number):void{
            Tween.clearAll(_focusBox);
            if(useTween){
                Tween.to(_focusBox,{scaleX:1,scaleY:1},tweenDuration);                
            }else{
                _focusBox.scale(1,1,true);    
            }
        }