Plasma (Seb Lee's)

gistfile1.hx

/**
see it working here: http://try.haxe.org/#Bb6eF

taken from here: http://seb.ly/2007/11/animated-plasma-in-flash/

*/
import flash.display.BitmapData;
import flash.events.Event;
import flash.display.Bitmap;

class Test {
	
	var bitmapData:BitmapData;
	var width:Int;
	var height:Int;
	var v:Float;
	var colour:Int;
	var time:Float;
	
	public function new() {
		
		width = 200;
      	height = 150;
		time = 0;
		
		var bitmap = new Bitmap();
		bitmapData = new BitmapData( width, height, false , 0x000000 );       
		bitmap.bitmapData = bitmapData;
		flash.Lib.current.addChild( bitmap );
	
		flash.Lib.current.addEventListener(Event.ENTER_FRAME, enterFrame);

	}
	
	function enterFrame(e) {
		for(ix in 0...width) {
		     for(iy in 0...height) {

				v = Math.sin(dist(ix + time, iy, 128.0, 128.0) / 8.0)
						+ Math.sin(dist(ix, iy, 64.0, 64.0) / 8.0)
						+ Math.sin(dist(ix, iy  , 192.0, 64) / 7.0)
						+ Math.sin(dist(ix, iy+ time/ 7, 192.0, 100.0) / 8.0);
					colour = Std.int((4 + v)) * 32;
					
				bitmapData.setPixel(ix, iy, colour);
		    }
		}
		time += 1.5;
	}
	
	inline function dist(a:Float, b:Float, c:Float, d:Float)
	{
		return Math.sqrt(((a - c) * (a - c) + (b - d) * (b - d)));
	}
	
	static function main() {
		new Test();
	}
}