The legend says Newton discovered the gravity after being hit by a falling apple. You will learn forces by raising some objects from the ground.
We'll start with a basic script that will place three dynamic spheres on a static floor.
The following will be your starting Main
class:
package { import flash.display.Sprite; import flash.events.Event; import Box2D.Dynamics.*; import Box2D.Collision.*; import Box2D.Collision.Shapes.*; import Box2D.Common.Math.*; public class Main extends Sprite { private var world:b2World; private var worldScale:Number=30; private var sphereVector:Vector.<b2Body>; public function Main() { world=new b2World(new b2Vec2(0,10),true); debugDraw(); floor(); sphereVector=new Vector.<b2Body>(); for (var i:int=0; i<3; i++) { sphereVector.push(sphere(170+i*150,410,40)); } addEventListener(Event.ENTER_FRAME,updateWorld); } private function sphere(pX...