phaser/v3/src/camera/KeyControl.js

var GetValue = require('../utils/object/GetValue');

//  var camControl = new CameraControl({
//      camera: this.cameras.main,
//      left: cursors.left,
//      right: cursors.right,
//      speed: float OR { x: 0, y: 0 }
//  })

var KeyControl = function (config)
{
    this.camera = GetValue(config, 'camera', null);

    this.left = GetValue(config, 'left', null);
    this.right = GetValue(config, 'right', null);
    this.up = GetValue(config, 'up', null);
    this.down = GetValue(config, 'down', null);

    var speed = GetValue(config, 'speed', null);

    if (typeof speed === 'number')
    {
        this.speedX = speed;
        this.speedY = speed;
    }
    else
    {
        this.speedX = GetValue(config, 'speed.x', 0);
        this.speedY = GetValue(config, 'speed.y', 0);
    }

    this.active = (this.camera !== null);
};

KeyControl.prototype.constructor = KeyControl;

KeyControl.prototype = {

    start: function ()
    {
        this.active = (this.camera !== null);
    },

    stop: function ()
    {
        this.active = false;
    },

    update: function (delta)
    {
        if (!this.active)
        {
            return;
        }

        if (delta === undefined) { delta = 1; }

        var cam = this.camera;

        if (this.up && this.up.isDown)
        {
            cam.scrollY -= ((this.speedY * delta) | 0);
        }
        else if (this.down && this.down.isDown)
        {
            cam.scrollY += ((this.speedY * delta) | 0);
        }

        if (this.left && this.left.isDown)
        {
            cam.scrollX -= ((this.speedX * delta) | 0);
        }
        else if (this.right && this.right.isDown)
        {
            cam.scrollX += ((this.speedX * delta) | 0);
        }
    },

    destroy: function ()
    {
        this.camera = null;

        this.left = null;
        this.right = null;
        this.up = null;
        this.down = null;
    }
};

module.exports = KeyControl;