box2D simulation doesn't work
- by shadow_of__soul
has been a while since last time i used box2D, and i needed to make some stuff, and i saw that my simulation don't worked (compiles, but do anything). i haven't been able to even have working the examples or this simple example i'm pasting below:
package
{
import flash.display.Sprite;
import flash.events.Event;
import Box2D.Common.Math.b2Vec2;
import Box2D.Dynamics.b2World;
import Box2D.Dynamics.b2BodyDef;
import Box2D.Dynamics.b2Body;
import Box2D.Collision.Shapes.b2CircleShape;
import Box2D.Dynamics.b2Fixture;
import Box2D.Dynamics.b2FixtureDef;
import org.flashdevelop.utils.FlashConnect;
import flash.events.TimerEvent;
import flash.utils.Timer;
public class Main extends Sprite
{
public var world:b2World;
public var wheelBody:b2Body;
public var stepTimer:Timer;
public function Main():void
{
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
var gravity:b2Vec2 = new b2Vec2(0, 10);
world = new b2World(gravity, true);
var wheelBodyDef:b2BodyDef = new b2BodyDef();
wheelBodyDef.type = b2Body.b2_dynamicBody;
wheelBody = world.CreateBody(wheelBodyDef);
var circleShape:b2CircleShape = new b2CircleShape(5);
var wheelFixtureDef:b2FixtureDef = new b2FixtureDef();
wheelFixtureDef.shape = circleShape;
var wheelFixture:b2Fixture = wheelBody.CreateFixture(wheelFixtureDef);
stepTimer = new Timer(0.025 * 1000);
stepTimer.addEventListener(TimerEvent.TIMER, onTick);
FlashConnect.trace(wheelBody.GetPosition().x, wheelBody.GetPosition().y);
stepTimer.start();
// entry point
}
private function onTick(a_event:TimerEvent):void
{
world.Step(0.025, 10, 10);
FlashConnect.trace(wheelBody.GetPosition().x, wheelBody.GetPosition().y);
}
}
}
on this, the object should fall down, but the positions reported me by the trace method, are always 0. so is not a display problem, that i see everything freeze, is why the simulation is not working, and i have no idea why :( can anyone point me to the right direction of where i need to look for the problem?
my settings are:
windows 7
flashdevelop 4.2.1
SDK: 4.6.0
compiling for flash 10, but i tried every target i have available (till flash 11.5)
project set at 30fps
