Without entering too much into the Box2D source code, you should know that it not only solves collisions on its own, but also provides four interesting listeners that allow you to interact with collision, retrieving information, or even modifying some parameters. Everything will be managed within a new class I called customContact
, thanks to the SetContactListener method, which allows us to create custom contact callbacks.
Having said this, create a new file called customContact.as and write the following lines of code:
package {
import Box2D.Dynamics.*;
import Box2D.Collision.*;
import Box2D.Dynamics.Contacts.*;
public class customContact extends b2ContactListener {
override public function BeginContact(contact:b2Contact):void{
trace("a collision started");
var fixtureA:b2Fixture=contact.GetFixtureA();
var fixtureB:b2Fixture=contact.GetFixtureB();
var bodyA:b2Body=fixtureA.GetBody();
var bodyB:b2Body=fixtureB.GetBody...