Game Engine

const canvas = document.querySelector("canvas");
canvas.addEventListener("touchstart", handleStart);
canvas.addEventListener("touchmove", handleMove);
canvas.addEventListener("touchend", handleEnd);
canvas.addEventListener("touchcancel", handleCancel);

document.addEventListener("touchstart", touchHandler);
document.addEventListener("touchmove", touchHandler);

function touchHandler(e) {
  if (e.touches) {
    playerX = e.touches[0].pageX - canvas.offsetLeft - playerWidth / 2;
    playerY = e.touches[0].pageY - canvas.offsetTop - playerHeight / 2;
    e.preventDefault();
  }
}

// Access pointers
this.game.input.activePointer;       // Most recently active pointer
this.game.input.pointer1;            // First pointer
this.game.input.pointer2;            // Second pointer

// Add more pointers (up to 10 total)
this.game.input.addPointer();

// Global input events
this.game.input.onDown.add(itemTouched, this);
this.game.input.onUp.add(itemReleased, this);
this.game.input.onTap.add(itemTapped, this);
this.game.input.onHold.add(itemHeld, this);

const player = this.game.add.sprite(30, 30, "ship");
player.inputEnabled = true;
player.input.enableDrag();
player.events.onDragStart.add(onDragStart, this);
player.events.onDragStop.add(onDragStop, this);

function onDragStart(sprite, pointer) {
  console.log(`Dragging at: ${pointer.x}, ${pointer.y}`);
}

this.buttonShoot = this.add.button(
  this.world.width * 0.5, 0,
  "button-alpha",    // transparent image
  null,
  this
);
this.buttonShoot.onInputDown.add(this.goShootPressed, this);
this.buttonShoot.onInputUp.add(this.goShootReleased, this);

this.gamepad = this.game.plugins.add(Phaser.Plugin.VirtualGamepad);
this.joystick = this.gamepad.addJoystick(100, 420, 1.2, "gamepad");
this.button = this.gamepad.addButton(400, 420, 1.0, "gamepad");

document.addEventListener("keydown", keyDownHandler);
document.addEventListener("keyup", keyUpHandler);

this.cursors = this.input.keyboard.createCursorKeys();  // Arrow key objects
this.keyLeft = this.input.keyboard.addKey(Phaser.KeyCode.A);  // Custom key binding
// Check key state with .isDown property
// Listen for press events with .onDown.add()

this.game.input.mousePointer;                    // Mouse position and state
this.game.input.mousePointer.isDown;             // Is any mouse button pressed
this.game.input.mousePointer.x;                  // Mouse X coordinate
this.game.input.mousePointer.y;                  // Mouse Y coordinate
this.game.input.mousePointer.leftButton.isDown;  // Left mouse button
this.game.input.mousePointer.rightButton.isDown; // Right mouse button
this.game.input.activePointer;                   // Platform-independent (mouse + touch)

let rightPressed = false;
let leftPressed = false;
let upPressed = false;
let downPressed = false;

function keyDownHandler(event) {
  if (event.code === "ArrowRight") rightPressed = true;
  else if (event.code === "ArrowLeft") leftPressed = true;
  if (event.code === "ArrowDown") downPressed = true;
  else if (event.code === "ArrowUp") upPressed = true;
}

function keyUpHandler(event) {
  if (event.code === "ArrowRight") rightPressed = false;
  else if (event.code === "ArrowLeft") leftPressed = false;
  if (event.code === "ArrowDown") downPressed = false;
  else if (event.code === "ArrowUp") upPressed = false;
}

function draw() {
  ctx.clearRect(0, 0, canvas.width, canvas.height);

  if (rightPressed) playerX += 5;
  else if (leftPressed) playerX -= 5;
  if (downPressed) playerY += 5;
  else if (upPressed) playerY -= 5;

  ctx.drawImage(img, playerX, playerY);
  requestAnimationFrame(draw);
}

this.cursors = this.input.keyboard.createCursorKeys();
this.keyLeft = this.input.keyboard.addKey(Phaser.KeyCode.A);
this.keyRight = this.input.keyboard.addKey(Phaser.KeyCode.D);
this.keyUp = this.input.keyboard.addKey(Phaser.KeyCode.W);
this.keyDown = this.input.keyboard.addKey(Phaser.KeyCode.S);

// In update:
if (this.cursors.left.isDown || this.keyLeft.isDown) {
  // move left
} else if (this.cursors.right.isDown || this.keyRight.isDown) {
  // move right
}
if (this.cursors.up.isDown || this.keyUp.isDown) {
  // move up
} else if (this.cursors.down.isDown || this.keyDown.isDown) {
  // move down
}

this.keyFire1 = this.input.keyboard.addKey(Phaser.KeyCode.X);
this.keyFire2 = this.input.keyboard.addKey(Phaser.KeyCode.SPACEBAR);

if (this.keyFire1.isDown || this.keyFire2.isDown) {
  // fire the weapon
}

if (this.game.device.desktop) {
  moveText = "Arrow keys or WASD to move";
  shootText = "X or Space to shoot";
} else {
  moveText = "Tap and hold to move";
  shootText = "Tap to shoot";
}

window.addEventListener("gamepadconnected", gamepadHandler);
window.addEventListener("gamepaddisconnected", gamepadHandler);

let controller = {};
let buttonsPressed = [];

function gamepadHandler(e) {
  controller = e.gamepad;
  console.log(`Gamepad: ${controller.id}`);
}

window.addEventListener("gamepadconnected", gamepadHandler);

function gamepadUpdateHandler() {
  buttonsPressed = [];
  if (controller.buttons) {
    for (const [i, button] of controller.buttons.entries()) {
      if (button.pressed) {
        buttonsPressed.push(i);
      }
    }
  }
}

function gamepadButtonPressedHandler(button) {
  return buttonsPressed.includes(button);
}

function draw() {
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  gamepadUpdateHandler();

  if (gamepadButtonPressedHandler(12)) playerY -= 5;  // D-Pad Up
  else if (gamepadButtonPressedHandler(13)) playerY += 5;  // D-Pad Down
  if (gamepadButtonPressedHandler(14)) playerX -= 5;  // D-Pad Left
  else if (gamepadButtonPressedHandler(15)) playerX += 5;  // D-Pad Right
  if (gamepadButtonPressedHandler(0)) alert("BOOM!");  // A Button

  ctx.drawImage(img, playerX, playerY);
  requestAnimationFrame(draw);
}

const GamepadAPI = {
  active: false,
  controller: {},

  connect(event) {
    GamepadAPI.controller = event.gamepad;
    GamepadAPI.active = true;
  },

  disconnect(event) {
    delete GamepadAPI.controller;
    GamepadAPI.active = false;
  },

  update() {
    GamepadAPI.buttons.cache = [...GamepadAPI.buttons.status];
    GamepadAPI.buttons.status = [];

    const c = GamepadAPI.controller || {};
    const pressed = [];

    if (c.buttons) {
      for (let b = 0; b < c.buttons.length; b++) {
        if (c.buttons[b].pressed) {
          pressed.push(GamepadAPI.buttons.layout[b]);
        }
      }
    }

    const axes = [];
    if (c.axes) {
      for (const ax of c.axes) {
        axes.push(ax.toFixed(2));
      }
    }

    GamepadAPI.axes.status = axes;
    GamepadAPI.buttons.status = pressed;
    return pressed;
  },

  buttons: {
    layout: ["A", "B", "X", "Y", "LB", "RB", "LT", "RT",
             "Back", "Start", "LS", "RS",
             "DPad-Up", "DPad-Down", "DPad-Left", "DPad-Right"],
    cache: [],
    status: [],
    pressed(button, hold) {
      let newPress = false;
      if (GamepadAPI.buttons.status.includes(button)) {
        newPress = true;
      }
      if (!hold && GamepadAPI.buttons.cache.includes(button)) {
        newPress = false;
      }
      return newPress;
    }
  },

  axes: {
    status: []
  }
};

window.addEventListener("gamepadconnected", GamepadAPI.connect);
window.addEventListener("gamepaddisconnected", GamepadAPI.disconnect);

if (GamepadAPI.axes.status) {
  if (GamepadAPI.axes.status[0] > 0.5) playerX += 5;       // Right
  else if (GamepadAPI.axes.status[0] < -0.5) playerX -= 5; // Left
  if (GamepadAPI.axes.status[1] > 0.5) playerY += 5;       // Down
  else if (GamepadAPI.axes.status[1] < -0.5) playerY -= 5; // Up
}

if (this.game.device.desktop) {
  if (GamepadAPI.active) {
    moveText = "DPad or left Stick to move";
    shootText = "A to shoot, Y for controls";
  } else {
    moveText = "Arrow keys or WASD to move";
    shootText = "X or Space to shoot";
  }
} else {
  moveText = "Tap and hold to move";
  shootText = "Tap to shoot";
}

// Standard arrow key controls work automatically with TV remotes
this.cursors = this.input.keyboard.createCursorKeys();
if (this.cursors.right.isDown) {
  // move player right
}

// Discover manufacturer-specific remote key codes
window.addEventListener("keydown", (event) => {
  console.log(event.keyCode);
});

// Handle custom remote buttons (codes vary by manufacturer)
window.addEventListener("keydown", (event) => {
  switch (event.keyCode) {
    case 8:   // Pause (Panasonic example)
      break;
    case 588: // Custom action
      break;
  }
});

<script src="https://js.leapmotion.com/leap-0.6.4.min.js"></script>

const toDegrees = 1 / (Math.PI / 180);
let horizontalDegree = 0;
let verticalDegree = 0;
const degreeThreshold = 30;
let grabStrength = 0;

Leap.loop({
  hand(hand) {
    horizontalDegree = Math.round(hand.roll() * toDegrees);
    verticalDegree = Math.round(hand.pitch() * toDegrees);
    grabStrength = hand.grabStrength;
  },
});

function draw() {
  ctx.clearRect(0, 0, canvas.width, canvas.height);

  if (horizontalDegree > degreeThreshold) playerX -= 5;
  else if (horizontalDegree < -degreeThreshold) playerX += 5;

  if (verticalDegree > degreeThreshold) playerY += 5;
  else if (verticalDegree < -degreeThreshold) playerY -= 5;

  if (grabStrength === 1) fireWeapon();

  ctx.drawImage(img, playerX, playerY);
  requestAnimationFrame(draw);
}

doppler.init((bandwidth) => {
  const diff = bandwidth.left - bandwidth.right;
  // Positive diff = movement in one direction
  // Negative diff = movement in the other direction
});

const Cylon = require("cylon");

Cylon.robot({
  connections: {
    arduino: { adaptor: "firmata", port: "/dev/ttyACM0" },
  },
  devices: {
    makey: { driver: "makey-button", pin: 2 },
  },
  work(my) {
    my.makey.on("push", () => {
      console.log("Button pushed!");
      // Trigger game action
    });
  },
}).start();