[Feature Request] Deadzone radius setting for touch analog stick

[Leopard20]

Currently it's not possible to change the touch analog stick deadzone radius. It is extremely important though. Right now the "central circle" has to be moved to the corner of the outer circle before any input is registered.

I think the "Calibrate analog stick" settings should be applied to the touch ones as well.

[iota97]

Just few random thought about this:

Applying the setting will change the default (not by much tho'). We could also have the same setting only for touch but kinda meh.

Applying the setting is really easy, what's trickier imho is how to handle the touch stick draw.

Currently the stick position peak the PSP data struct, this can't work if we remap the value (it will have to match the pressed position on the screen rather than the value send to the PSP logic, like custom stick)

If you move the stick with other mean should it should peek psp data i.e:

// Draw logic
if (dragPointerID_ == -1) 
  //use_psp_control_struct
else
  //use_touch_pos

Then we should probably inverse remap the PSP data to match the visual, this get a bit trickier as PeekAnalogPos should probably return 0.0f when nothing is moved (it uses 127.5f and the data is a int that get rounded to 127, I'm not sure if that have a reason or a edge case bug).

[Leopard20]

@iota97
Yeah good point, but I don't think it matters that much. If you use another input method why would it matter how you see it on the touch control? You don't read screen coords as long as you don't touch the screen so there shouldn't be a problem. 🤔

[unknownbrackets]

Well, the range is [0, 255] and it's being mapped to [-1, 1]. 128 is central value, because it rounds up, but if we subtracted and divided by 128 it would become impossible to get 1.

That said, we could quantize it to 0, since we really want ..., -0.0196, -0.0117, 0, 0.0117, 0.0196. If we rounded to the nearest 0.01 it'd be fine, I suppose.

Right now the "central circle" has to be moved to the corner of the outer circle before any input is registered.

So if I understand right, the concern here is that the PSP game code is applying a deadzone that requires you go all the way to the edge, and we want to apply the inverse deadzone so you don't have to move it as far. Right? Seems like we might just apply the inverse of the inverse deadzone to the scale in drawing it maybe...

-[Unknown]

[Leopard20]

So if I understand right, the concern here is that the PSP game code is applying a deadzone that requires you go all the way to the edge, and we want to apply the inverse deadzone so you don't have to move it as far. Right?

Yeah, but not necessarily a game. Even when I use the right analog stick with a custom binding (bound to action keys) the problem still persists (input is only registered when the "stick" crosses the circle, and no input is registered inside the circle)

[unknownbrackets]

Well, I think the right analog's thresholds are hardcoded at 50%. But afaik the left touch analog stick has no natural deadzone, so only the game is applying one there.

-[Unknown]