flash on 2015-9-24

by mutantleg 24 Sep 2015

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/**
 * Copyright mutantleg ( http://wonderfl.net/user/mutantleg )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/sNuj
 */

package {
    import flash.events.MouseEvent;
    import flash.events.Event;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            
            vecRect = new Vector.<xRect>(0, false);
            var a:xRect; 
            a = new xRect(); vecRect.push(a); a.cx = 200; a.cy = 200; 
            a = new xRect(); vecRect.push(a); a.cx = 300; a.cy = 200; 
            a = new xRect(); vecRect.push(a); a.cx = 100; a.cy = 150; 
            a = new xRect(); vecRect.push(a); a.cx = 50; a.cy = 60; 
            
            
            stage.addEventListener(MouseEvent.MOUSE_DOWN, onMdown);
            stage.addEventListener(MouseEvent.MOUSE_UP, onMup);
            stage.addEventListener(Event.ENTER_FRAME, onEnter);
        }//ctor
        
        public function onMdown(e:MouseEvent):void { mbutton = 1;}
        public function onMup(e:MouseEvent):void { mbutton = 0; }
        
        public var mbutton:int = 0;
        public var curOver:xRect = null
        public var vecRect:Vector.<xRect>;
        
        public function getMag(ax:Number, ay:Number):Number
        { return Math.sqrt(ax*ax+ay*ay); }

        public function conRect(a:xRect, b:xRect, rest:Number, spec:int =0, t:Number=1.0):void
        {
            var mag:Number; var dx:Number; var dy:Number;
            var imp:Number;
            dx = a.cx-b.cx; dy= a.cy-b.cy;
            mag = getMag(dx,dy);
             if (mag == 0) { mag = 0.0001; }
             if (spec == 1 && mag >= rest) { return; } //collision
             dx /= mag; dy /= mag;
            imp = mag - rest;
            imp *= 0.5;
            imp *= t;
            
            a.cx += dx * -imp;       a.cy += dy * -imp;
            b.cx += dx * imp;        b.cy += dy * imp;

            graphics.moveTo(a.cx,a.cy);
            graphics.lineTo(b.cx,b.cy);
            
        }//conrect

        
        public function onEnter(e:Event):void
        {
            var mx:Number; var my:Number;
            mx = stage.mouseX; my = stage.mouseY;
            
            graphics.clear();
            graphics.lineStyle(2, 0);
            
            conRect(vecRect[0], vecRect[1], 50);
            conRect(vecRect[1], vecRect[2], 70, 0.5);
            conRect(vecRect[2], vecRect[3], 80, 0.25);
            conRect(vecRect[0], vecRect[2], 32, 1);
            conRect(vecRect[0], vecRect[3], 32, 1);
            conRect(vecRect[1], vecRect[3], 32, 1);
            
            
            var i:int; var num:int; var a:xRect;
            num = vecRect.length;
            for(i=0;i<num;i+=1)
            {
              a = vecRect[i];
              graphics.drawCircle(a.cx,a.cy, 16);
              if (mbutton == 1 && curOver == null && getMag(a.cx-mx, a.cy-my) < 16)
              { curOver = a;  }
            
            }//nexti
            
            
            
            
            if (mbutton == 0) { curOver = null;}
            if (curOver != null) { curOver.cx = mx; curOver.cy = my; }
            
        }//onenter
        
    }//classend
}

internal class xRect
{
  public var cx:Number = 0;
  public var cy:Number = 0;
    
}//xrect