赤と青と緑の曲線
/**
* Copyright umhr ( http://wonderfl.net/user/umhr )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/aRwR
*/
package
{
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.Event;
import flash.filters.BlurFilter;
import flash.geom.ColorTransform;
import flash.geom.Point;
import net.hires.debug.Stats;
/**
* ...
* @author umhr
*/
[SWF(width = 465, height = 465, backgroundColor = 0x000000, frameRate = 30)]
public class Canvas extends Sprite
{
private var _mousePoint:Vector.<Vector.<Point>> = new Vector.<Vector.<Point>>();
private var _count:int;
private var _bitmap:Bitmap;
private var _shape:Shape = new Shape();
private const FADE:ColorTransform = new ColorTransform(1, 1, 1, 1, -0x6, -0x6, -0x6);
public function Canvas():void
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
// entry point
_bitmap = new Bitmap(new BitmapData(stage.stageWidth, stage.stageHeight, false, 0x000000));
this.addChild(_bitmap);
_bitmap.filters = [new BlurFilter(8,8)];
//this.addChild(_shape);
var point:Point = new Point(mouseX, mouseY);
for (var i:int = 0; i < 3; i++) {
var vector:Vector.<Point> = new Vector.<Point>();
for (var j:int = 0; j < 3; j++) {
vector[j] = point;
}
_mousePoint[i] = vector;
}
this.addEventListener(Event.ENTER_FRAME, onEnter);
this.addChild(new Stats());
}
private function onEnter(e:Event):void
{
_count++;
for (var i:int = 0; i < 3; i++) {
var inertiaPoint:Point = _mousePoint[i][0].subtract(_mousePoint[i][1]).add(_mousePoint[i][0]);
var radian:Number = _count / 6 + Math.PI * 2 * i / 3;
var r:Number = 10 * (1 + 1 * Math.sin(_count / 12));
var mousePoint:Point = new Point(mouseX + Math.cos(radian) * r , mouseY + Math.sin(radian) * r);
inertiaPoint.x = inertiaPoint.x * 0.97 + mousePoint.x * 0.03;
inertiaPoint.y = inertiaPoint.y * 0.97 + mousePoint.y * 0.03;
_mousePoint[i].unshift(inertiaPoint);
_mousePoint[i].length = 3;
}
draw(_mousePoint);
}
/**
* 線を描画
* @param mousePoint
*/
private function draw(mousePoint:Vector.<Vector.<Point>>):void {
_shape.graphics.clear();
var colors:Array = [0xFF0000, 0x00FF00, 0x0000FF];
for (var i:int = 0; i < 3; i++) {
_shape.graphics.lineStyle(16, colors[i]);
var m0:Point = Point.interpolate(mousePoint[i][0], mousePoint[i][1], 0.5);
var m1:Point = Point.interpolate(mousePoint[i][1], mousePoint[i][2], 0.5);
_shape.graphics.moveTo(m0.x, m0.y);
_shape.graphics.curveTo(mousePoint[i][1].x, mousePoint[i][1].y, m1.x, m1.y);
}
_bitmap.bitmapData.colorTransform(_bitmap.bitmapData.rect, FADE);
_bitmap.bitmapData.draw(_shape, null, null, "add");
}
}
}