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  [Odejava] Contact help  (Read 1224 times)
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Offline darkprophet

Senior Duke




Go Go Gadget Arms


« Posted 2004-10-12 16:21:16 »

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:

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            // 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:

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            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?

Friends don't let friends make MMORPGs.

Blog | Volatile-Engine
Offline William Denniss

JGO Coder


Projects: 2


Fire at will


« Reply #1 - Posted 2004-10-12 21:16:03 »

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

Will.

Offline darkprophet

Senior Duke




Go Go Gadget Arms


« Reply #2 - Posted 2004-10-19 19:54:14 »

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

Friends don't let friends make MMORPGs.

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Offline William Denniss

JGO Coder


Projects: 2


Fire at will


« Reply #3 - Posted 2004-10-19 21:22:00 »

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.

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