Some more Away3D :)

I have just spent the last hour or so playing with Away3d (again ), and have just made this among other things. It is a sort of implementation of a particle system, but as I am still fairly rough around the edges with Away3D, its probably not the best.

1. For a start, I am a bit confused with the maths side of things. For example getting the most out of the view-ports and how to get the cameras in the right position. So this caused me that problem of all the dots being in the bottom left right corner.
2. When you go close up to the dots, some of them seem stretched.
3. Any ideas?

Here’s a snap shot:

And the code:

package {

	import away3d.cameras.HoverCamera3D;
	import away3d.containers.Scene3D;
	import away3d.containers.View3D;
	import away3d.primitives.Sphere;

	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;

	public class ThreeDParticle extends Sprite {

		public var cam:HoverCamera3D = new HoverCamera3D;
		public var scene:Scene3D = new Scene3D;
		public var view:View3D = new View3D( { x:550, y:400, scene:scene, camera:cam } );
		public var numOfDots:Number = 50;
		public var sphere:Sphere;
		public var cameraSpeed:Number = 0.3; // Approximately same speed as mouse movement.

		public var lastPanAngle:Number;
		public var lastTiltAngle:Number;
		public var lastMouseX:Number;
		public var lastMouseY:Number;
		public var move:Boolean;

		public function ThreeDParticle():void {
			// This is added so you can include this SWF in another.
			this.addEventListener(Event.ADDED_TO_STAGE, Init);
		}

		private function Init(evt:Event):void {
			addChild(view);

			cam.zoom = 1;
			cam.x = 0;
			cam.y = 0;

			for (var i:uint = 0; i <= numOfDots; i++) {
				sphere = new Sphere( { material:"black#red", radius:20, x:Math.random() * 1000, y:Math.random() * 1000, z:Math.random() * 100, segmentsH:10, segmentsW:10 } );
				view.scene.addChild(sphere);
			}
			this.addEventListener(Event.ENTER_FRAME, enterFrame);
			this.stage.addEventListener(MouseEvent.MOUSE_DOWN, mouseDown);
			this.stage.addEventListener(MouseEvent.MOUSE_UP, mouseLeave);

			view.render();
		}

		private function enterFrame(evt:Event):void {
			if (move) {
				cam.targetpanangle = cameraSpeed * (this.stage.mouseX - lastMouseX) + lastPanAngle;
				cam.targettiltangle = cameraSpeed * (this.stage.mouseY - lastMouseY) + lastTiltAngle;
			}

			cam.hover();
			view.render();
		}

		private function mouseDown(evt:MouseEvent):void {

			move = true;
			lastPanAngle = cam.targetpanangle;
			lastTiltAngle = cam.targettiltangle;
			lastMouseX = stage.mouseX;
			lastMouseY = stage.mouseY;

			cam.hover();
			view.render();
		}

		private function mouseLeave(evt:MouseEvent):void {
			move = false;
		}

	}
}

And here’s the link to download it all: http://harry-northover-code-store.googlecode.com/files/3D%20Particle.zip

Right there you go for tonight!

Harry.