forked from: Fermat's Spiral
you perceive that particles move to center but this is just illusion.
move the slider to change the roatation speed.
超高速回転させると吸い込んでいるように見える！
/**
* Copyright takun336 ( http://wonderfl.net/user/takun336 )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/hNvo
*/
// forked from yuuganisakase's Fermat's Spiral
//
//you perceive that particles move to center but this is just illusion.
//move the slider to change the roatation speed.
//
//超高速回転させると吸い込んでいるように見える！
//
package
{
import com.bit101.components.Slider;
import com.flashdynamix.motion.effects.core.ColorEffect;
import com.flashdynamix.motion.effects.core.FilterEffect;
import com.flashdynamix.motion.layers.BitmapLayer;
import flash.display.BitmapData;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.filters.BlurFilter;
import flash.geom.ColorTransform;
import flash.geom.Matrix;
import flash.geom.Point;
[SWF(width=465, height=465, frameRate=60, backgroundColor=110)]
public class Spiral extends Sprite
{
private var theta:Number;
private var holder:Sprite;
private var layer:BitmapLayer;
private var slider:Slider;
private var g:Shape;
private var rotationSpeed:Number = 0.05;
private const BmSize:Number = 700;
public function Spiral():void
{
Wonderfl.capture_delay(9);
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
layer = new BitmapLayer(BmSize, BmSize,1,0x111111,false,true);
layer.clearOnRender = false;
//var bl:BlurFilter = new BlurFilter(4,4);
//layer.add(new FilterEffect(bl));
//layer.add(new ColorEffect(new ColorTransform(1, 1, 1, 0.9)));
//addChild(layer);
//layer.x = layer.y = - (BmSize / 10);
holder = new Sprite();
holder.x = holder.y = 465 / 2;
addChild(holder);
holder.addChild(layer);
g = new Shape();
slider = new Slider(Slider.HORIZONTAL, this, 10, 440, onClick);
slider.setSize(150, 15);
slider.value = 60;
slider.backClick = true;
theta = 0;
onClick();
addEventListener(Event.ENTER_FRAME, onEnter);
stage.addEventListener(MouseEvent.MOUSE_UP, onClick);
}
private function drawFermat(c:Number = 0):void
{
if (c > 120) return;
var r:Number;
var p:Point;
if (c >= 0) {
r = 32 * Math.sqrt(c);
p = Point.polar(r, c);
}
g.graphics.lineStyle(3, 0xffffff);
g.graphics.drawCircle(p.x, p.y, 1);
g.graphics.drawCircle( -p.x, -p.y, 1);
layer.bitmapData.draw(g, new Matrix(1,0,0,1,BmSize/2, BmSize/2));
g.graphics.clear();
}
private function rotate():void
{
holder.rotation += rotationSpeed;
}
private function onClick(e:Event = null):void
{
layer.x = layer.y = -(BmSize)/2;
//layer.bitmapData.fillRect(layer.bitmapData.rect, layer.bgColor);
rotationSpeed = slider.value * 0.1;
//theta = 0;
g.graphics.clear();
g.graphics.lineStyle(3, 0xffffff);
}
private function onEnter(e:Event):void
{
drawFermat(theta);
rotate();
if (theta < 1) theta += 0.02;
else theta += 0.1;
}
}
}