SDL2 gamepad input capture

[jordiperezarti]

Can someone tell me how i can capture the gamepad input using the SDL incorporated component in Ogre 14.4 ?

[jordiperezarti]

i have implemented in

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OgreBites::InputListener

the

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axisMoved(evt)

I do

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if (evt.type == OgreBites::CONTROLLERAXISMOTION)

i capture the evt.value for the given evt.axis

But i have troubles when the gamepad is dragging or the gamepad has ended the move.
I loose the event when the gamepad is draging, and i never capture evt.value == 0.

any light here?

[rpgplayerrobin]

Try to poll it each frame instead of relying on callback events:
SDL_GameControllerGetAxis
https://wiki.libsdl.org/SDL2/SDL_GameControllerGetAxis

[jordiperezarti]

Now runs very smooth and very well, thanks.

[jordiperezarti]

The gamepad input capture works perfectly, but after a pair of minutes using it, the render stops and the program becomes bloqued.
i am doing:

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void CustomCameraMan::checkGamepadMotion()
{
    if (this->gamepad == nullptr)
        gamepad = SDL_GameControllerFromInstanceID(0);

const short leftAxisLx = SDL_GameControllerGetAxis(gamepad, SDL_CONTROLLER_AXIS_LEFTX);
const short leftAxisLy = SDL_GameControllerGetAxis(gamepad, SDL_CONTROLLER_AXIS_LEFTY);
const short leftAxisRx = SDL_GameControllerGetAxis(gamepad, SDL_CONTROLLER_AXIS_RIGHTX);
const short leftAxisRy = SDL_GameControllerGetAxis(gamepad, SDL_CONTROLLER_AXIS_RIGHTY);

Is needed some call to SD2 poll evends or some resource dispose function?

[rpgplayerrobin]

I have no idea why that happens, but first try some things yourself before we can help more in detail.

ChatGPT is a good friend, and it has some ideas: https://chatgpt.com/share/691c91b6-e2a8 ... b4b718a619

[jordiperezarti]

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while (SDL_PollEvent(&e)){};

seems to clean the queue and keep the render loop floid.

[rpgplayerrobin]

There are a lot more things you need to handle if you have not done that loop previously.

That should already have happened if you used ApplicationContextSDL::pollEvents:

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void ApplicationContextSDL::pollEvents()
{
    if(mWindows.empty())
    {
        // SDL events not initialized
        return;
    }

SDL_Event event;
while (SDL_PollEvent(&event))
{
    switch (event.type)
    {
    case SDL_QUIT:
        mRoot->queueEndRendering();
        break;
    case SDL_WINDOWEVENT:
        if(event.window.event != SDL_WINDOWEVENT_RESIZED)
            continue;

        for(WindowList::iterator it = mWindows.begin(); it != mWindows.end(); ++it)
        {
            if(event.window.windowID != SDL_GetWindowID(it->native))
                continue;

            Ogre::RenderWindow* win = it->render;
            win->resize(event.window.data1, event.window.data2);
            windowResized(win);
        }
        break;
    case SDL_CONTROLLERDEVICEADDED:
        if(auto c = SDL_GameControllerOpen(event.cdevice.which))
        {
            const char* name = SDL_GameControllerName(c);
            Ogre::LogManager::getSingleton().stream() << "Opened Gamepad: " << (name ? name : "unnamed");
        }
        break;
    default:
        _fireInputEvent(convert(event), event.window.windowID);
        break;
    }
}
}