package org.codemonkey.papervision3d.util {
	import org.papervision3d.cameras.Camera3D;
	import org.papervision3d.objects.DisplayObject3D;
	
	/**
	 * Updatable DisplayObject3D with some time management. You can specify the update frequency
	 * in milliseconds and a phase value per second that is scaled accordingly.
	 *
	 * @author Benny Bottema
	 */
	public class RealtimeDisplayObject3D extends DisplayObject3D {
		
		private var frequency:Number;
		private var lastUpdate:Number;
		private var phasePerSecond:Number;
		
		public function RealtimeDisplayObject3D(frequency:Number, phasePerSecond:Number) {
			this.frequency = frequency;
			this.phasePerSecond = phasePerSecond;
			lastUpdate = new Date().getTime();
		}
		
		public function update(camera:Camera3D):void {
			var currentTime:Number = new Date().getTime();
			if ((currentTime - lastUpdate) > frequency) {
				realtimeUpdate(camera, phasePerSecond / (1000 / frequency));
				lastUpdate = currentTime;
			}
		}
		
		protected function realtimeUpdate(camera:Camera3D, stepsize:Number):void {
			// abstract
		}
	}
}