snaky

by Scmiz 14 May 2011

Embed

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

package {
	import flash.display.Graphics;
    import flash.display.Sprite;
	import flash.events.Event;
	import flash.geom.Point;
    public class FlashTest extends Sprite {
		private const NUM:uint = 42;
		
		private const COLOR_MIN:uint = 128;
		private const COLOR_MAX:uint = 255;
		
		private const CTF_RedInc:uint = 0;
		private const CTF_GreenInc:uint = 1;
		private const CTF_RedDec:uint = 2;
		private const CTF_BlueInc:uint = 3;
		private const CTF_GreenDec:uint = 4;
		private const CTF_BlueDec:uint = 5;
		
		private var _sprite:Sprite;
		private var _array:Array;
		private var _count:uint = 0;
		private var _colorTransformMode:uint = CTF_RedInc;
		private var _r:uint = COLOR_MIN;
		private var _g:uint = COLOR_MIN;
		private var _b:uint = COLOR_MAX;
		
        public function FlashTest() {
			var g:Graphics = this.graphics;
			g.beginFill(0x000000);
			g.drawRect(0, 0, 465, 465);
			g.endFill();

			_sprite = new Sprite();
			_array = new Array();


			var length:Number = 600;
			for (var index:uint = 0; index < NUM; ++index) {
				var rad:Number = Math.PI * 2 * (index / NUM);
				var x:Number = Math.cos(rad) * length;
				var y:Number = Math.sin(rad) * length;
				_array.push(new Point(x, y));
			}
		
			_sprite.x = 232.5;
			_sprite.y = 232.5;
			this.addChild(_sprite);
			
			this.addEventListener(Event.ENTER_FRAME, proc);
        }
		
		private function proc(e:Event):void {
			++_count;
			if (_count >= _array.length) _count = 0;

			_sprite.rotationZ += 1;
			
			var g:Graphics = _sprite.graphics;
			g.clear();

			var colorSpeed:uint = 16;
			switch (_colorTransformMode) {
				case CTF_RedInc:
					_r += colorSpeed;
					if (_r >= COLOR_MAX) {
						_r = COLOR_MAX;
						_colorTransformMode = CTF_BlueDec;
					}
					break;
				case CTF_BlueDec:
					_b -= colorSpeed;
					if (_b <= COLOR_MIN) {
						_b = COLOR_MIN;
						_colorTransformMode = CTF_GreenInc;
					}
					break;
				case CTF_GreenInc:
					_g += colorSpeed;
					if (_g >= COLOR_MAX) {
						_g = COLOR_MAX;
						_colorTransformMode = CTF_RedDec;
					}
					break;
				case CTF_RedDec:
					_r -= colorSpeed;
					if (_r <= COLOR_MIN) {
						_r = COLOR_MIN;
						_colorTransformMode = CTF_BlueInc;
					}
					break;
				case CTF_BlueInc:
					_b += colorSpeed;
					if (_b >= COLOR_MAX) {
						_b = COLOR_MAX;
						_colorTransformMode = CTF_GreenDec;
					}
					break;
				case CTF_GreenDec:
					_g -= colorSpeed;
					if (_g <= COLOR_MIN) {
						_g = COLOR_MIN;
						_colorTransformMode = CTF_RedInc;
					}
					break;
			}
			
			var color:uint = (_r << 16) + (_g << 8) + (_b << 0);
			g.lineStyle(2, color);
			for (var index:uint = 0; index < _array.length; ++index) {
				var pos:Point = _array[index];
				var nextPos:Point = _array[(index + _count) % _array.length];
				
				g.moveTo(pos.x, pos.y);
				g.curveTo(nextPos.x, nextPos.y, 0, 0);
			}

		}
    }
}