flash on 2011-2-23
/**
* Copyright alambertsimon ( http://wonderfl.net/user/alambertsimon )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/i7xt
*/
package {
import flash.display.Sprite;
import flash.display.DisplayObject;
import flash.geom.Point;
import flash.events.MouseEvent;
import flash.events.Event;
public class FlashTest extends Sprite {
private var _container:Sprite = new Sprite();
private var isPress:Boolean;
public function FlashTest() {
graphics.beginFill(0);
graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight);
var _pointArray:Array = [
new Point( 0 , 0 ),
new Point( 265 , 0 ),
new Point( 265 , 265 ),
new Point( 0 , 265 )
];
addChild( _container );
stage.addEventListener( MouseEvent.MOUSE_DOWN, function ():void
{
isPress = true;
while (_container.numChildren) _container.removeChildAt(0);
var _sliceObj:LineSliceObject = new LineSliceObject( stage , _pointArray ,
(Math.random() * 0x99 + 0x66) << 16 |
(Math.random() * 0x99 + 0x66) << 8 |
(Math.random() * 0x99 + 0x66)
);
_sliceObj.x = _sliceObj.y = 100;
_container.addChild( _sliceObj );
if (!isPress) return;
var t1:Number = Math.random() * Math.PI
var t2:Number = t1 + Math.random() * (Math.PI * 2 / 3) + Math.PI * 1 / 3;
var Pt1:Point = Point.polar(300, t1).add(new Point(stage.stageWidth/2, stage.stageHeight / 2));
var Pt2:Point = Point.polar(300, t2).add(new Point(stage.stageWidth/2, stage.stageHeight / 2));
var lsos:Array = [];
var child:DisplayObject = _container.getChildAt(0);
if(child is LineSliceObject && LineSliceObject(child)._area >= 30){
lsos.push(child);
}
for each(var lso:LineSliceObject in lsos){
lso.slice(Pt1, Pt2);
}
});
/*addEventListener(Event.ENTER_FRAME, function ():void
{
if (!isPress) return;
var t1:Number = Math.random()*3//Math.random() * Math.PI * 2;
var t2:Number = t1+Math.random()*3//t1 + Math.random() * (Math.PI * 2 / 3) + Math.PI * 1 / 3;
var Pt1:Point = Point.polar(300, t1).add(new Point(stage.stageWidth/2, stage.stageHeight / 2));
var Pt2:Point = Point.polar(300, t2).add(new Point(stage.stageWidth/2, stage.stageHeight / 2));
var lsos:Array = [];
var child:DisplayObject = _container.getChildAt(0);
if(child is LineSliceObject && LineSliceObject(child)._area >= 30){
lsos.push(child);
}
for each(var lso:LineSliceObject in lsos){
lso.slice(Pt1, Pt2);
}
/* for (var i:int = 0; i < _container.numChildren; i++)
{
var child:DisplayObject = _container.getChildAt(i);
if(child is LineSliceObject && LineSliceObject(child)._area >= 30){
lsos.push(child);
}
}
for each(var lso:LineSliceObject in lsos){
lso.slice(Pt1, Pt2);
}
});*/
}
}
}
import flash.display.DisplayObject;
import flash.display.Sprite;
import flash.display.Shape
import flash.events.Event;
import flash.display.Stage;
import flash.geom.Point;
import flash.geom.Rectangle;
import flash.events.MouseEvent;
import flash.display.Graphics;
import org.libspark.betweenas3.BetweenAS3;
import org.libspark.betweenas3.easing.*;
class LineSliceObject extends Sprite
{
private var _stage:Stage;
private var _pointArray:Array;
private var _color:uint;
private var _point1:Point;
private var _point2:Point;
private var _length:int;
public var _area:Number;
public function LineSliceObject( _stage:Stage , _pointArray:Array , _color:uint )
{
this._stage = _stage;
this._pointArray = _pointArray;
this._color = _color;
// this._area = areaFast(_pointArray);
drawRectFromPoint( this , _pointArray , _color );
this._area = areaFast(this);
}
/*
* ------------------------------------------------------------
* Graphic描画
* ------------------------------------------------------------
*/
private function drawRectFromPoint( _target:* , _pointArray:Array , _color:uint ):void
{
_target.graphics.beginFill( _color , 1.0 );
_target.graphics.moveTo( _pointArray[ 0 ].x , _pointArray[ 0 ].y );
_length = _pointArray.length;
for ( var i:int = 1; i < _length; i ++ )
{
var _point:Point = _pointArray[ i ];
_target.graphics.lineTo( _point.x , _point.y );
}
_target.graphics.endFill();
}
private static function areaFast(_target:DisplayObject) : Number
{
var r:Rectangle = _target.getRect(_target);
return _target.width * _target.height;
}
/*
* ------------------------------------------------------------
* スライス
* ------------------------------------------------------------
*/
public function slice( _point1:Point , _point2:Point ):void
{
var _pt1:Point = globalToLocal( _point1 );
var _pt2:Point = globalToLocal( _point2 );
var _newPointArray:Array = [[], []];
var _numCross:int = 0;
for ( var i:int = 0; i < _length ; i ++ )
{
var _pt3:Point = _pointArray[ i ];
var _pt4:Point = ( _pointArray[ i + 1 ] ) ? _pointArray[ i + 1 ] : _pointArray[ 0 ];
var _crossPt:Point = crossPoint( _pt1 , _pt2 , _pt3 , _pt4 );
_newPointArray[ 0 ].push( _pt3 );
if ( _crossPt )
{
_newPointArray[ 0 ].push( _crossPt );
_newPointArray[ 1 ].push( _crossPt );
_newPointArray.reverse();
_numCross ++;
}
}
if ( _numCross == 2 )
{
var _newObj1:LineSliceObject = new LineSliceObject( _stage , _newPointArray[ 0 ] , _color );
var _newObj2:LineSliceObject = new LineSliceObject( _stage , _newPointArray[ 1 ] , Math.random() * 0xFFFF00 );
_newObj1.x = _newObj2.x = this.x;
_newObj1.y = _newObj2.y = this.y;
parent.addChild( _newObj1 );
parent.addChild( _newObj2 );
parent.removeChild( this );
var _vector:Point = _pt2.subtract( _pt1 );
var _force:int = 6 * Math.random() * 20;
var _d:Number = Math.sqrt(_vector.x * _vector.x + _vector.y * _vector.y);
var _fx:Number = (_vector.x >= 0 ? _vector.x : -_vector.x) / _d;
var _fy:Number = (_vector.y >= 0 ? _vector.y : -_vector.y) / _d;
var _fx1:Number = ( _newPointArray[0][0].x < _newPointArray[1][0].x ) ? -_fx : _fx;
var _fx2:Number = ( _newPointArray[1][0].x < _newPointArray[0][0].x ) ? -_fx : _fx;
var _fy1:Number = ( _newPointArray[0][0].y < _newPointArray[1][0].y ) ? -_fy : _fy;
var _fy2:Number = ( _newPointArray[1][0].y < _newPointArray[0][0].y ) ? -_fy : _fy;
BetweenAS3.tween( _newObj1 , { x : _newObj1.x + _fx1 * _force , y : _newObj1.y + _fy1 * _force} , null, Math.random()*4+2, Expo.easeOut ).play();
BetweenAS3.tween( _newObj2 , { x : _newObj2.x + _fx2 * _force , y : _newObj2.y + _fy2 * _force} , null, Math.random()*4+2, Expo.easeOut ).play();
}
// else _stage.addEventListener( MouseEvent.MOUSE_DOWN , mouseDownHandler );
}
/*
* ------------------------------------------------------------
* 交点を割り出す
* ------------------------------------------------------------
*/
private function crossPoint( _pt1:Point , _pt2:Point , _pt3:Point , _pt4:Point ):Point
{
var _vector1:Point = _pt2.subtract( _pt1 );
var _vector2:Point = _pt4.subtract( _pt3 );
var c21:Number = cross(_vector2, _vector1);
if ( c21 == 0.0) return null;
var _s:Number = cross( _vector2 , _pt3.subtract( _pt1) ) / c21;
if ( isCross( _s ))
{
var _t:Number = cross( _vector1, _pt1.subtract( _pt3 ) ) / cross( _vector1, _vector2 );
if(isCross(_t)){
_vector1.x *= _s;
_vector1.y *= _s;
return _pt1.add( _vector1 );
}
}
return null;
}
private function cross( _vector1:Point , _vector2:Point ):Number
{
return ( _vector1.x * _vector2.y - _vector1.y * _vector2.x );
}
public static function isCross( _n:Number ):Boolean
{
return ( ( 0 <= _n ) && ( _n <= 1) );
}
}