see #15761
SDL is the only device that supports relative mode and
mouse input is actually somewhat broken if it's *not* enabled.
This reverts commit 45c5ef8798
and 88b007907a.
Easy way to reproduce:
1. Connect a bluetooth mouse to your Android phone with Minetest installed
2. Play Minetest
3. Slowly move the mouse to the right so that the camera rotates continously
4. While still moving the mouse continously, tap the screen a few times per second
Before this commit: The camera jumps around randomly.
After this commit: The camera moves like it should.
This is a combination of two Irrlicht changes copied from MoNTE48/irrlicht
and one Minetest change authored by me. I have no idea why this works, but
it does work and I have spent way too much time on this bug already.
Allows you to change viewing range using numpad +/- again. This fix also works with the current unreleased version of SDL 3.
The keycodes for numpad keys (both SDL keycodes and Irrlicht keycodes) are not the same as the keycodes for the equivalent non-numpad keys and don't correspond to chars, so I mapped them to chars manually.
Since I think the resolution of https://github.com/minetest/minetest/issues/13770 was "just disable numlock", I made sure to only do this for the numpad number keys if numlock is enabled.
It now works even if window creation succeeds and only context creation fails.
Adapted from https://github.com/MoNTE48/Irrlicht . This should be fine
license-wise since that repo still contains the original Irrlicht license
(this is no legal advice).
Original PR: https://github.com/MoNTE48/Irrlicht/pull/9
Co-authored-by: Deve <deveee@gmail.com>
