Comments on: Understanding how Box2D manages collisions

By: Creation of a Flash Stabilize! clone using Box2D – part 4 : Emanuele Feronato

Mon, 23 Nov 2009 18:28:35 +0000

[...] already showed you how Box2D manages collisions but I made it directly editing the built in b2ContactListener.as [...]

By: Troy Gilbert

Troy Gilbert — Wed, 14 Oct 2009 19:59:29 +0000

As Danny Parker mentioned, you shouldn’t modify the b2ContactListener.as file directly. Just create a new class that inherits from b2ContactListener, create an instance of that, then pass it to b2World.SetContactListener().

By: mike

mike — Thu, 24 Sep 2009 19:25:10 +0000

Hey really cool tutorial Thanks.

Although, I have a question:

I would like to fire my personal function in the main class file (“myFunction()”) directly from:
b2ContactListener.as

I tried many statements, but I can’t link to my main class file “mike.as”

Your help would be much appreciated.

Cheers!

Mike

By: Danny Parker

Danny Parker — Mon, 02 Feb 2009 14:31:35 +0000

Just a small comment on the way you have directly edited the b2ContactListener file.

The file has set these up as virtual functions so you should write your own listener and extend b2ContactListener. then you write the functions as:

public override function Add(){}

That way you can keep your Box2D folder nice and clean.

Thanks for the great tutorials, they’ve been a great help.

: D

By: Urkel

Urkel — Sun, 28 Dec 2008 18:33:47 +0000

Really nice tutorial. The collisions were one of the things I found difficult to understand about Box2DFlash. That’s why I did a fast game clone with all the source code available, but it’s not as incremental to learn as your tutorials, but I think it can be useful.

The job you are doing for the Flash game community is amazing, keep up the awesome work!

By: anlik

anlik — Wed, 24 Dec 2008 00:01:43 +0000

By: Joe

Joe — Tue, 23 Dec 2008 20:50:34 +0000

Wanted to take a moment to thank you for your continuing box2d tutorials. Seems like right around the time I reach a question, you post a tutorial about how to deal with it.

Keep up the great work and I love the blog!