Feature Request: Snapping Control Stick Angle

[halest]

Hello,

What

Many emulators have a setting to snap the control stick to cardinal directions to simulate a control stick like on the N64 or GameCube controller.
Usually this includes a setting, which offsets to snap to the nearest cardinal direction.
For example the setting is set to "5", angles from 85 to 95 would snap to 90.

Why

• Closer emulation of classic controller behaviour
• Speedrunning and such
• Better support for circular controllers

If you would point me to the place in the code where the input angle is read I can give it a shot, I haven't worked with C/C++ in 15 years though, so I can't promise anything.
Edit: Am I correct to assume that this would be the correct place to start: Permalink

[hizzlekizzle]

Looks like a good place to start, yeah.

[halest]

Alright, I got the snapping working really well, I'm very happy with it.
Now I need someone who is familiar with the repo to help me with this:
How do I add an entry to the settings for the core (or is this a controller setting?) and what is the "correct" way to access such a setting in the code. Is there a header or definition file somewhere? I want to integrate this as idiomatic as possible if that's the correct way to say it in English.

In a perfect world it would end up being something like this:
if (SETTINGS_SNAP_ACTIVE) { [...] if (angle < SETTING_SNAP_MINIMUM) { [...] } }

Thanks!

[hizzlekizzle]

You basically just need to hook up a "core option," which is pretty simple. You can use the "independent c-button controls" option as an example, since it's also an input option:
https://github.com/libretro/parallel-n64/blob/master/libretro/libretro.c#L456
https://github.com/libretro/parallel-n64/blob/master/mupen64plus-core/src/plugin/emulate_game_controller_via_libretro.c#L74

[halest]

Awesome, everything seems to work perfectly. Let me test this for a day or two and then I'll launch a Pull Request. Thanks for the help!