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input.md

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Input

Every driver's update() builds one platform-independent InputPadData per channel per frame: a unified button bitmask (pressed / held / released) that is a superset of every supported controller, plus per-hardware-profile copies (GameCube pad, Wiimote, Nunchuk, Classic Controller, Wii U Pro Controller, Wii U GamePad) so a controller made of several parts - for example a Wiimote with a Nunchuk - reports each part separately before they are merged. It also carries the pointer position and angle, whether the pointer is valid, and whether it came from touch. A persistent InputController per channel turns that into what widgets consume: analog deadzone, directional repeat and scroll delay timing, and Wiimote orientation, so none of that logic is duplicated per platform.

  • Pointer smoothing. The Wii U driver filters the Wiimote IR pointer with a One Euro Filter (OneEuroFilter.h), which smooths heavily while the pointer is nearly still and backs off as it moves faster - a steady cursor at rest without lag on fast sweeps.
  • GamePad touch. Touch positions are scaled onto the design canvas and delivered as pointer input; touch-down, hold, and release act as A-button press, hold, and release, so touch-driven widgets behave like a pointer click.
  • HOME button. On Wii U the HOME button is delivered to the app as an ordinary INPUT_BTN_HOME press, and the system HOME menu overlay doesn't open on its own, so the app decides what HOME does. WutInputDriver::openHomeButtonOverlay() opens the overlay on demand (the demo's "Wii U Overlay" button).
  • Wiimote orientation. InputDriver::setWiimoteOrientation() selects WIIMOTE_ORIENTATION_VERTICAL or WIIMOTE_ORIENTATION_HORIZONTAL; the semantic Accept/Cancel triggers resolve to A/B (vertical) or 2/1 (horizontal) accordingly.
  • Rumble. setRumbleEnabled() turns rumble on or off globally. Menu hover feedback is a short (about 33 ms) tick followed by an enforced quiet gap (about 100 ms), so quickly moving across buttons doesn't produce a continuous buzz. On the Wii U GamePad the tick uses a reduced-amplitude pattern.
  • Wii U GamePad on Wii. The vendored libwiidrc lets a Wii app read a Wii U GamePad as an additional controller.

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