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gameinputjs

v13.2.7

Published

Browser library to upgrade the Gamepad API experience

Downloads

28

Readme

Game-Input JavaScript Library

npm license language environment

A client-side JavaScript module one can import to add good gamepad support to web-powered games or other gamepad-powered web applications.

Installation

GameinputJS's src and img folders need to be accessible in the distributed version of your website.

I would recommend setting up a package.json script to help update a distributable copy of the library outside node_modules:

{
    "name": "@me/my-client-webapp",
    "scripts": {
        "deps2lib": "shx rm -rf lib && shx mkdir lib && shx cp -r node_modules/gameinputjs lib/"
    }
    ...
}

Which would allow you to run:

    npm i --save-dev shx
    npm i gameinputjs
    npm run deps2lib

Usage

Import from within a Javascript module, construct it, and then use either the events or make a game loop that uses the properties.

import { GameInput, DetectedOS } from './lib/gameinputjs/src/gameinput.js'
import { GameInputSchemaSectionNames, GameInputSchemaButtonNames } from './lib/gameinputjs/src/gameinput-schema.js'

const gameInput = new GameInput()

Event-Driven Style

gameInput
    .onReinitialize(() => {
        console.debug("Players updated")
        const firstPlayer = gameInput.getPlayer(0)
        if (!firstPlayer?.model) {
            noPlayers()
            return
        }
        displayButtons(firstPlayer)
        document.querySelector('img.gamepad').src = `img/${firstPlayer?.model?.iconName ?? 'generic'}.png`
    })
    .onButtonDown((playerIndex, sectionName, buttonName) => {
        const player = gameInput.getPlayer(playerIndex)
        console.debug(`Player ${player} pushed ${player.getButtonText(sectionName, buttonName)} (${buttonName})`)
    })
    .onButtonUp((playerIndex, sectionName, buttonName) => {
        const player = gameInput.getPlayer(playerIndex)
        console.debug(`Player ${player} released ${player.getButtonText(sectionName, buttonName)} (${buttonName})`)

        if (sectionName === 'center' && buttonName === 'menu') {
            console.debug('menu requested')
            return
        }

        if (sectionName === 'face' && buttonName === player.schema.ordinalButton(0)) {
            console.debug('Jump / Confirm pushed')
        }
    })

Game-Loop Style

function gameLoop() {
    for (const player of gameInput.Players) {
        if (!player)
            continue

        if (player.state.face.ordinal(0))
            player.rumble({ duration: 200, weakMagnitude: 1.0, strongMagnitude: 0.25 })

        const leftStick = player.getStickVector('left')
        console.debug(`Player left stick vector is ${leftStick.toString()}`)
        requestAnimationFrame(() => gameLoop())
    }
}
requestAnimationFrame(() => gameLoop()) // kick off