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Android: Fix camera jump when switching to mouse mode

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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.
This commit is contained in:
grorp 2024-09-28 11:23:13 +02:00 • committed by grorp
parent 4952f17df4
commit f5076723e8
3 changed files with 19 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

15
irr/src/CIrrDeviceSDL.cpp
View file

@ -721,12 +721,19 @@ bool CIrrDeviceSDL::run()
irrevent.EventType = irr::EET_MOUSE_INPUT_EVENT;
irrevent.MouseInput.Event = irr::EMIE_MOUSE_MOVED;
MouseX = irrevent.MouseInput.X =
static_cast<s32>(SDL_event.motion.x * ScaleX);
MouseY = irrevent.MouseInput.Y =
static_cast<s32>(SDL_event.motion.y * ScaleY);
MouseXRel = static_cast<s32>(SDL_event.motion.xrel * ScaleX);
MouseYRel = static_cast<s32>(SDL_event.motion.yrel * ScaleY);
if (!SDL_GetRelativeMouseMode()) {
MouseX = static_cast<s32>(SDL_event.motion.x * ScaleX);
MouseY = static_cast<s32>(SDL_event.motion.y * ScaleY);
} else {
MouseX += MouseXRel;
MouseY += MouseYRel;
}
irrevent.MouseInput.X = MouseX;
irrevent.MouseInput.Y = MouseY;
irrevent.MouseInput.ButtonStates = MouseButtonStates;
irrevent.MouseInput.Shift = (keymod & KMOD_SHIFT) != 0;
irrevent.MouseInput.Control = (keymod & KMOD_CTRL) != 0;