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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| const speedMs = 1000 / 60; | ||
| let lastT = Date.now(); | ||
|
|
||
| let state; | ||
| let bindings = new Map(); | ||
| let inBindingMode = false; | ||
| let yetToBind = []; | ||
|
|
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| import { GP_ACTIONS } from './constants.mjs'; | ||
|
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| let onGamepadEventHandler = () => {}; | ||
| let onGamepadBindingMessage = () => {}; | ||
|
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| export function subscribeToGamepadEvents(fn) { | ||
| onGamepadEventHandler = fn; | ||
| } | ||
|
|
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| export function subscribeToGamepadBindingMessages(fn) { | ||
| onGamepadBindingMessage = fn; | ||
| } | ||
|
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| function onButton(i, isDown) { | ||
| const k = `b${i}`; | ||
| //console.warn(`button ${i}: ${isDown}`); | ||
| if (!isDown) return; | ||
| if (inBindingMode) { | ||
| const purpose = yetToBind.shift(); | ||
| bindings.set(k, purpose); | ||
| onGamepadBindingMessage(`button #${i} -> ${purpose}`); | ||
| continueBinding(); | ||
| } else { | ||
| const purpose = bindings.get(k); | ||
| if (purpose) { | ||
| //console.warn(k, purpose); | ||
| onGamepadEventHandler(purpose); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function onAxis(i, v) { | ||
| //console.warn(`axis ${i}: ${v}`); | ||
| if (!v) return; | ||
| const k = `a${i}${v}`; | ||
| //console.warn(`axis ${k}`); | ||
| if (inBindingMode) { | ||
| if (!bindings.get(k)) { | ||
| const purpose = yetToBind.shift(); | ||
| bindings.set(k, purpose); | ||
| onGamepadBindingMessage(`axis ${k} -> ${purpose}`); | ||
| continueBinding(); | ||
| } | ||
| } else { | ||
| const purpose = bindings.get(k); | ||
| if (purpose) { | ||
| //console.warn(k, purpose); | ||
| onGamepadEventHandler(purpose); | ||
| } | ||
| } | ||
| } | ||
|
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| let bindingPromise, bindingResolve; | ||
|
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| export function rebindGamepad() { | ||
| bindingPromise = new Promise((resolve) => { | ||
| bindingResolve = resolve; | ||
| }); | ||
| bindings = new Map(); | ||
| inBindingMode = true; | ||
| yetToBind = GP_ACTIONS.slice(); | ||
| onGamepadBindingMessage(`define gamepad button/axis for action ${yetToBind[0]}...`); | ||
| return bindingPromise; | ||
| } | ||
|
|
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| function continueBinding() { | ||
| if (yetToBind.length > 0) { | ||
| onGamepadBindingMessage(`define gamepad button/axis for action ${yetToBind[0]}...`); | ||
| } else { | ||
| inBindingMode = false; | ||
| bindingResolve(); | ||
| } | ||
| } | ||
|
|
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| export function getGamepadBindings() { | ||
| // TODO compat? | ||
| return Object.fromEntries(bindings); | ||
| } | ||
|
|
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| export function setGamepadBindings(o) { | ||
| bindings = new Map(Object.entries(o)); | ||
| } | ||
|
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| const CUT1 = -0.5; | ||
| const CUT2 = 0.5; | ||
|
|
||
| function makeDiscrete(v) { | ||
| if (v < CUT1) return 'a'; | ||
| if (v > CUT2) return 'b'; | ||
| return ''; | ||
| } | ||
|
|
||
| function readGamepad() { | ||
| const gp = navigator.getGamepads()[0]; | ||
| if (!gp) return; | ||
|
|
||
| if (!state) { | ||
| state = { | ||
| buttons: [], | ||
| axes: [], | ||
| } | ||
| gp.buttons.forEach((b) => state.buttons.push(b.pressed)); | ||
| //gp.axes.forEach((a) => state.axes.push(a)); | ||
| gp.axes.forEach((a) => state.axes.push(makeDiscrete(a))); | ||
| } else { | ||
| gp.buttons.forEach((b, i) => { | ||
| const v = b.pressed; | ||
| if (v !== state.buttons[i]) onButton(i, v); | ||
| state.buttons[i] = v; | ||
| }); | ||
| gp.axes.forEach((v, i) => { | ||
| v = makeDiscrete(v); | ||
| if (v !== state.axes[i]) onAxis(i, v); | ||
| state.axes[i] = v; | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| export function setupGamepad() { | ||
| const onTick = () => { | ||
| requestAnimationFrame(onTick); | ||
| const t = Date.now(); | ||
| if (t - lastT >= speedMs) { | ||
| readGamepad(); | ||
| lastT = t; | ||
| } | ||
| }; | ||
|
|
||
| onTick(); | ||
| } |
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