Calling 'setForceAndTorqueCallback' inside a class [solved]

[Auradrummer]

Is possible to do this?

That is because I have a bunch of variables that can cause interference, and all of them are private. So, would make the things easier if the ForceAndTorqueCallback was a member of my class. Is possible doing this?

Thanks

Ney

[ledahut]

viewtopic.php?f=15&t=1102

[Auradrummer]

Hello ledahut,

Thanks for the fast reply, but I'm still confused:

I made the following:

obj.h

Code: Select all

   class obj
   {
       private:
           void applyPlayerForce (const NewtonBody* body, dFloat timestep, int thread);
   };


obj.cpp

Code: Select all

   obj::applyPlayerForce (const NewtonBody* body, dFloat timestep, int thread)
   {
       ... code ...
   }

   obj::constructPhysics (..args..)
   {
        ....
        SetTorqueAndForceCallback(obj_body,applyPlayerForce)
        ...
   };


As I saw in the example, this should work, but when I compile I receive the following compiler error:

error: argument of type `void (obj::)(const NewtonBody*, float, int)' does not match `void (*)(const NewtonBody*, float, int)'|

I'm still working here, but I'm still confused... Thanks again.

[Auradrummer]

Hello guys,

Solved, but I not understood why.

Inside the prototype, I have to declare static void instead of void, but at the implementation stills void.

But I not understood why this works. Is someone have some time to explain me what happens, should be good. I'll try to discover too, and post the answer here.

Thanks

Ney

[Auradrummer]

Another information if someones has the same question as mine.

To access all the members of you class inside the callback (including the privates), just pass 'this' as user data together NewtonBody. In the post by ledahut this is done, and works very fine.