[examples] Fix core_3d_camera_free

[ghost]

Changes

The free camera main issues were actually fixed on #3240, but I forgot to follow-up and finish/clean up the example (R68-R69, L74-L76).

Notes

@raysan5 IMHO, I don't think we should add/fix the Alt + Mouse Wheel Pressed to Rotate (L74), neither the (commented) Alt + Ctrl + Mouse Wheel Pressed for Smooth Zoom (L75) because, with the current camera setup, that would require hardcoding them on rcamera.h. IMHO, that would make the handling on rcamera.h needlessly complex just to accomodate this example. Please let me know if that's not the case, and they should be added.

Reference

#3487

Environment

Tested on Linux (Mint 21.1 64-bit).

Edits

1: added line marks; editing.

[raysan5]

IMHO, that would make the handling on rcamera.h needlessly complex just to accomodate this example. Please let me know if that's not the case, and they should be added.

@ubkp Agree. With the camera module redesign, some of the examples were not properly adapted and some previous features were removed in exchange of other features and better code organization.

In any case, it would be nice if that functionality could be moved to user side in some way, the example tried to illustrate a 3d free navigation system similar to the ones available on DCC packages (3dMax, Maya, Blender...)

[ghost]

In any case, it would be nice if that functionality could be moved to user side in some way, the example tried to illustrate a 3d free navigation system similar to the ones available on DCC packages (3dMax, Maya, Blender...)

@raysan5 Oh, I thought it was "free" as in "noclip/spectate mode".

If it's ok, I'd like to give a try at reviewing the camera system (specially moving the camera logic to the user side and the examples teaching/suggesting how a camera could be implemented with them), but I don't think I can get this ready for 5.0.

[raysan5]

If it's ok, I'd like to give a try at reviewing the camera system (specially moving the camera logic to the user side and the examples teaching/suggesting how a camera could be implemented with them), but I don't think I can get this ready for 5.0.

Sure, feel free. Actually with current camera module should be possible to implement the camera rotation on user side, using the available Camera*() functions.

There is also a UpdateCameraPro() available as a prove-of-concept of a camera control independent of inputs, allowing users to provide their own inputs for custom camera movement designs. core_3d_camera_first_person contains an usage example but probably a better example should be provided.

In any case, camera module is just provided for user convenience but updating Camera structure at user side should be enough for custom camera systems implementation (specially targeted to advance users).