Joystick support via SDL2 library?

[tsky]

@samiljan;222435

Nice work! Going with SDL sounds like the right move. There are still some features missing or incomplete in this version, like hot-plugging and multiple joysticks, but it looks mostly like a matter of adapting more of the old code.

Indeed, it is. Without your work i couldn´t do my hacks.

@samiljan;222435

I have to ask though, is there a reason why you changed the directory structure? If the source files don’t lie under the Source/ directory UE4 won’t find and build them for me at least. And, if you copy files instead of editing/moving them it’s hard to see exactly what is changed in the diffs.

Hmm, i put the files into my fork of UE4 in the plugins directory and it works fine. I try also put it into the plugins directory of some game projects with different UE4 versions and seems to run… IF i put the SDL2.dll in die binary directory of the plugins. Also compiled the SDL2 sources myself. Other ways i couldn´t get running.

@samiljan;222435

A comment about the input mapping. I’m not sure only creating the inputs that exists on the Joysticks currently plugged in is the way to go. Possible inputs should probably “exist” so they can be mapped even if the joystick isn’t currently plugged in. Also, now “Device 0 Button 0” is a different input than “Device 1 Button 0” while for example the built in “Gamepad Face Button Left” is the same input even with multiple gamepads - but mapped to different players. There are cases when one player uses multiple joysticks (such as using a HOTAS) but maybe it should be a special case?

Are you interested in working more on this, even if it is working well enough for your lab projects now?

Hmm, some of this points i play around with, but i didn´t found a solution wich works very well or stable. There are branches in my repo for. Ich changed many names to reflect a more abstract model of joysticks, gamepads etc.

I experiment with generating a one to one mapping of axis and buttons etc. So no more Device 0 Button 0 etc. Now it become to Button0_SaitekX52Pro… etc. this names where unique for each device. If the device is plugged on startup, no hotpluggin.

Multiple devices should work with this. I think one problem is that the InputMapping of UE4 takes over the device 0 each time.

HotpluggIn could work if i or someone else solve the regenerating problem of buttons, axis etc. - This is not a function i must have.

t.