package { // ｂｉｔｍａｐＦｉｌｔｅｒできれいに見えるようにした。 // しまった。forkにするべきだった。 import flash.display.Sprite; import flash.display.Shape; import flash.display.Bitmap; import flash.display.Stage; import flash.display.BitmapData; import flash.display.DisplayObjectContainer; import flash.display.LineScaleMode; import flash.display.BlendMode; import flash.geom.Rectangle; import flash.geom.Point; import flash.events.Event; import flash.utils.ByteArray; import flash.filters.BlurFilter; public class curve extends Sprite { var shape1:Shape; var shape2:Shape; var bmp:Bitmap; var curves:Object; var rotationColor:Number; var stg:DisplayObjectContainer; var mouseRad:Number; var mouseRadScale:Number; public function curve() { shape1=new Shape();//主線描画用 shape2=new Shape();//補助線描画用 bmp=new Bitmap(new BitmapData(stage.stageWidth,stage.stageHeight,true,0x00000000),"auto",true);//bitmap処理用 shape2.graphics.lineStyle(0, 0x0000ff, .2, true , LineScaleMode.NONE); addChild(bmp); addChild(shape2); addChild(shape1); curves=new Object(); init(); //mouseRad=0; //mouseRadScale=20; addEventListener(Event.ENTER_FRAME,update); } function init(){ rotationColor=Math.random()*0xffffff; shape1.graphics.clear(); shape2.graphics.clear(); curves.x=100;//Math.random()*550; curves.y=100;//Math.random()*400; shape1.graphics.moveTo(curves.x,curves.y); shape1.graphics.lineStyle(0, rotationColor, .5, true , LineScaleMode.NONE); curves.before=clone(curves); curves.x=120+Math.random()*20; curves.y=120+Math.random()*20; var cx=(curves.before.x+curves.x)/2; var cy=(curves.before.y+curves.y)/2 var line=new Rectangle(curves.x,curves.y,curves.before.x,curves.before.y); var turnLi:Point=getCrossLine(line); var lineL=getLineLength(line); trace(cx+" "+cy+" "+turnLi.x+" "+lineL); var cpS=cy-turnLi.x*cx; curves.ControlX=Math.sqrt(Math.abs(Math.pow(1/turnLi.x,2)))*lineL/2*(Math.round(Math.random())*2-1)+cx; curves.ControlY=turnLi.x*curves.ControlX+cpS; trace(curves.ControlX+":"+curves.ControlY); curves.before=clone(curves); shape1.graphics.curveTo(curves.ControlX,curves.ControlY,curves.x,curves.y); shape2.graphics.lineStyle(0, 0x00ff00, .25, true , LineScaleMode.NONE); shape2.graphics.drawCircle(curves.ControlX,curves.ControlY,5); } function update(e:Event){ var vec1=new Object(); vec1.vx=curves.before.x-curves.before.ControlX; vec1.vy=curves.before.y-curves.before.ControlY; vec1.vl=Math.sqrt(Math.pow(vec1.vx,2)+Math.pow(vec1.vy,2)); vec1.ux=vec1.vx/vec1.vl; vec1.uy=vec1.vy/vec1.vl; vec1.t=vec1.vy/vec1.vx; vec1.s=curves.before.y-vec1.t*curves.before.x; //shape2.graphics.moveTo(0,vec1.s); //shape2.graphics.lineTo(550,vec1.t*550+vec1.s); //--- var cnt=0; mouseRad+=.1; do{ /* var tagetpointX=this.mouseX+Math.cos(mouseRad)*mouseRadScale; var tagetpointY=this.mouseY+Math.sin(mouseRad)*mouseRadScale; var vectpX=tagetpointX-(curves.before.x);//+vec1.vx); var vectpY=tagetpointY-(curves.before.y);//+vec1.vy); var vectpL=Math.sqrt(Math.pow(vectpX,2)+Math.pow(vectpY,2)); trace(vectpL); var vectpUX=vectpX/vectpL; var vectpUY=vectpY/vectpL; */ curves.x=curves.before.x+vec1.vx+Math.random()*100-50; curves.y=curves.before.y+vec1.vy+Math.random()*100-50; var vl=Math.sqrt(Math.pow(curves.x-curves.before.x,2)+Math.pow(curves.y-curves.before.y,2)); cnt++; if(cnt>10000){trace("行き詰った");init();return;}// "+vl+":"+curves.x+":"+curves.y);init();return;} }while(vl<50 || vl>200 || curves.x<0 || curves.x>stage.stageWidth || curves.y<0 || curves.y>stage.stageHeight); rotationColor=(rotationColor+7)*int(rotationColor<0xdddddd); shape1.graphics.lineStyle(0, rotationColor, .5, true , LineScaleMode.NONE); //curves.ControlX=Math.random()*(Number(vec1.vx>0)*450-curves.before.x)+curves.before.x+(Number(vec1.vx>0)*2-1)*100; curves.ControlX=curves.before.x+vec1.vx; curves.ControlY=vec1.t*curves.ControlX+vec1.s; shape1.graphics.curveTo(curves.ControlX,curves.ControlY,curves.x,curves.y); shape2.graphics.drawCircle(curves.x,curves.y,2); shape2.graphics.drawCircle(curves.ControlX,curves.ControlY,5); shape2.graphics.moveTo(curves.before.x,curves.before.y); shape2.graphics.lineTo(curves.ControlX,curves.ControlY); shape2.graphics.lineTo(curves.x,curves.y); shape2.graphics.lineTo(curves.before.x,curves.before.y); curves.before=null; curves.before=clone(curves); bmp.bitmapData.draw(shape1,null,null,"screen"); bmp.bitmapData.applyFilter(bmp.bitmapData,new Rectangle(0,0,this.width,this.height),new Point(0,0),new BlurFilter(4,4)); } function getLineLength(p:Rectangle):Number{ var vx=p.x-p.width; var vy=p.y-p.height; var vl=Math.sqrt(Math.pow(vx,2)+Math.pow(vy,2)); return vl; } function getLine(p:Rectangle):Point{ var vx=p.x-p.width; var vy=p.y-p.height; //var vl=Math.sqrt(Math.pow(vx,2)+Math.pow(vy,2)); var ts=new Point(); ts.x=vy/vx; ts.y=p.height-ts.x*p.width; return ts; } function getCrossLine(p:Rectangle):Point{ var vx=p.x-p.width; var vy=p.y-p.height; var ts=new Point(); ts.x=-vx/vy; ts.y=p.y-ts.x*p.x; return ts; } function clone( arg:* ) :*{ var myBA:ByteArray = new ByteArray(); myBA.writeObject(arg); myBA.position = 0; return( myBA.readObject() ); } } }