Need a little direction on Collusion Detection

[bajabob]

I am not new to Java, but am to jPCT! I must say, so far I am really impressed!

I am trying to solve this issue, I cannot register a callback even when my objects supposedly collide. Any input? I'm using the same object twice.

Init:

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floor = Loader.load3DS(res.openRawResource(R.raw.object), 1)[0];
walls = Loader.load3DS(res.openRawResource(R.raw.object), 1)[0];

floor.translate(0, 0, -10);
floor.setName("floor");
floor.setCollisionMode(Object3D.COLLISION_CHECK_OTHERS);
floor.addCollisionListener(this);

walls.translate(0, 0, 0);
walls.setName("walls");
walls.setCollisionMode(Object3D.COLLISION_CHECK_OTHERS);
walls.addCollisionListener(this);

                                world.addObject(walls);
world.addObject(floor);

walls.strip();
floor.strip();


OnDrawFrame:

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                                SimpleVector s = floor.getCenter();
floor.translate(s.x, s.y, s.z+1);


Override "collision":

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                                Log.d("COLLUSION DETECTED!!!", "!!!!!!");


Can't wait to find out what I did. My first attempt at 3D.

Bob

[EgonOlsen]

translate() doesn't recognize any collisions. You have to use one of the checkCollision...methods to actually make jPCT check for collisions. Have a look here: http://www.jpct.net/wiki/index.php/Collision_detection

[AGP]

I'm almost certain that collisions break whenever setName() is called. Could you verify this, Egon?

[EgonOlsen]

No, it has nothing to do with it. setName() sets a new name, i.e. it assigns a string. The name and the collisions are not related in any way.

[AGP]

Then I will replicate it and show it to you.

[EgonOlsen]

Good luck with that. It's a simple String. It's not used for anything else then log output. The two topics are as unrelated as it gets.

[AGP]

And yet I've run into collision problems when I renamed my bullets in the past.

[EgonOlsen]

That's impossible, it has to be a conincidence. The name is used...

• ...to print out log messages
• ...in World to access objects via their name. But the API itself doesn't use this, it's solely for the user.
• ...in Serializer/Deserializer to...serialize and deserialize the name.

That's it! There's no relation to collision whatsoever. It would be plain stupid if there were anyway.