Which classes do I extend?

[PredaNoob]

This is a bit of a newbie question, but if for example, I want to extend the scene manager, and add a function; do I extend my class (inherit) from ISceneManager or CSceneManager?

Because I'm trying this in MySceneManager.h:

Code: Select all

#include <CSceneManager.h>
 
class RTSSceneManager : public CSceneManager
{
        virtual ICameraSceneNode* addCameraSceneNodeRTS(ISceneNode* parent = 0,
                        const core::vector3df& position = core::vector3df(0,0,0),
                        const core::vector3df& lookat = core::vector3df(0,0,100),
                        s32 id=-1, bool makeActive=true) = 0;
};
 

and it's giving me this error

fatal error C1083: Cannot open include file: 'CSceneManager.h': No such file or directory

It works if I use ISceneManager instead of CSceneManager, but then won't I have to re implement CSceneManager over again?

[hybrid]

Yes, there's no way to alter the scene manager itself except for changing the files directly and recompile Irrlicht. But you simply don't need to add this function to the scene manager. Just call new MyCameraSceneNodeRTS or whatever your class is called and the rest happens correctly. Just make sure that you add a parent in each call, there's no way to automatically fill in the scene manager in this case

[PredaNoob]

I see. In that case I'll just make MyCameraSceneNodeRTS add a regular CameraSceneNode to the scene manager and make it listen to key events then alter the CameraSceneNode's position, rotation. (or is that the wrong way to do it?)

Thank you for your help!

[CuteAlien]

You can maybe take a look how Irrlicht implements cameras. There is only one camera-class and the control is done with animators derived from ISceneNodeAnimator.
And those animators can overload isEventReceiverEnabled and return true in it to receive events.

[PredaNoob]

Thank you for the tip! I followed your advice and got the camera up and running like I want.