[Odejava] Contact help

Game Mechanics
#1

Hi,
Ive been messing around with Ode, and im impressed. Good work.

One thing tho, is that im trying to get the names (or the actual Geom) from a collision.

I am doing this:


            // collide objects in a given space
            collision.collide(space);
            
            // read and modify contact information
            iterateContacts();
            
            // apply the contact information for the collisions
            collision.applyContacts();
            
            // and step fast in the world
            world.stepFast();

Btw, collision is a type of JavaCollision;

And iterateContacts is:


            for (int i = 0; i < collision.getContactCount(); i++) {
                  contact.setIndex(i);
                  contact.setMode(Ode.dContactBounce | Ode.dContactApprox1);
                  contact.setBounce(0.004f);
                  contact.setBounceVel(0.002f);
                  contact.setMu(100f);
            }

Now I can get their ID’s:

contact.getGeomID1(); and that returns an int, not a String or a Geom object.

Any ideas?

#2

grab the latest from CVS - I have added some methods to get an actual Geom.

Will.

#3

Sorry, i cant seem to find this method.

Would you please tell me what its called and under which class are you referring to?

Thx

#4

Sure.

The class is org.odejava.collision.Contact

The methods are getGeom1(), getGeom2(). These have a O(log n) time penalty (the cost of accessing a hashmap). Other new methods are: geom1EqualTo() and geom2EqualTo() which have an O(1) time cost (integer comparison).

I can easily add comparable getBody1(), getBody2() methods as well.

NOTE: Not only did I add those methods but I fixed up a few bugs so I strongly suggest using the latest code in any case.

Will.