Particle Class

programming flash
1

I’m trying to follow along with Lynda.com’s “Building Particle Systems” lesson.

I’ve made a .as file with the following code:

package CustomClasses.Particle
{
	import flash.display.*;
	
	public class Particle extends Sprite
	{
		public xVelocity:Number;
		public yVelocity:Number;
		
		public function Particle()
		{
			xVelocity = 0;
			yVelocity = 0;
		}
		public function update():void
		{
			this.x += xVelocity;
			this.y += yVelocity;
		}
	}
}

I then made a Flash file with a movie clip and this code:

dot.xVelocity = 5;
dot.yVelocity = -1;

function updateBall(event:Event):void
{
	dot.update();
}

addEventListener(Event.ENTER_FRAME, updateBall);

When I try and preview the movie I keep getting errors even though I’ve copied exactly his code in the training video. These are the errors:

1071: Syntax error: expected a definition keyword (such as function) after attribute public, not xVelocity.
1084: Syntax error: expecting rightbrace before semicolon.
5000: The class ‘particle.Particle’ must subclass ‘flash.display.MovieClip’ since it is linked to a library symbol of that type.

Any help would be much appreciated!

2

a fla feil would be a good start, aside from adding var i can’t see anything actually happening from the code supplied.