How to reject contact in NewtonContactsProcess callback?

[ravarcade]

In old Newton lib (ver. 1.53) NewtonContactProcess can return 0 and stop processing on contact.
In newer lib this callback function can't return anything.
So question is how to implement same behaviour.

Background why i need it. Old game: Future Pinball uses Newton.dll ver 1.53. I try to upgrade it to new lib. Future Pinball is closed project. I don't have access to source. So all i do now is create midleware between FP and Newton.dll. Right now it almos work.
To the point. FP creates some object used as triggers. It uses NewtonContactProcess callback as place to take some actions. Right now if ball hit that object, ball is bounced from object.
I alredy try to use NewtonCollisionSetMode and disable collistion, but this way there is no action in game.

Any cluea how to in this callback reject collision?

[Julio Jerez]

to reject contacts in the newer libraries you do it like this

Code: Select all

void GenericContactProcess(const NewtonJoint* contactJoint, dFloat timestep, int threadIndex)
{
   void* nextContact;
   for (void* contact = NewtonContactJointGetFirstContact(contactJoint); contact; contact = nextContact) {
      nextContact = NewtonContactJointGetNextContact(contactJoint, contact);
      if (some_special_test) {
         NewtonContactJointRemoveContact(contactJoint, contact);
      }
   }
}


[ravarcade]

Thanks. It works.