Book Image

jQuery Game Development Essentials

By : Selim Arsever
Book Image

jQuery Game Development Essentials

By: Selim Arsever

Overview of this book

jQuery is a leading multi-browser JavaScript library that developers across the world utilize on a daily basis to help simplify client-side scripting. Using the friendly and powerful jQuery to create games based on DOM manipulations and CSS transforms allows you to target a vast array of browsers and devices without having to worry about individual peculiarities."jQuery Game Development Essentials" will teach you how to use the environment, language, and framework that you're familiar with in an entirely new way so that you can create beautiful and addictive games. With concrete examples and detailed technical explanations you will learn how to apply game development techniques in a highly practical context.This essential reference explains classic game development techniques like sprite animations, tile-maps, collision detection, and parallax scrolling in a context specific to jQuery. In addition, there is coverage of advanced topics specific to creating games with the popular JavaScript library, such as integration with social networks alongside multiplayer and mobile support. jQuery Game Development Essentials will take you on a journey that will utilize your existing skills as a web developer so that you can create fantastic, addictive games that run right in the browser.
Table of Contents (17 chapters)
jQuery Game Development Essentials
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Player control


We will still need to connect the player's object to the main loop. This is really trivial as all the logic is contained in the object. There is, however, one little detail we omitted. As it is the player will go out of the screen if he moves left. We need to follow him! The way we will implement it is thus: if the player goes beyond a given point, we will start to move the group containing all the sprites and tiles in the opposite direction. This will give the impression that the camera is following the player.

var gameLoop = function() {
        
    var idle = true;
    if(gf.keyboard[37]){ //left arrow
        player.left();
        idle = false;
    }
    if(gf.keyboard[38]){ //up arrow
        player.jump();
        idle = false;
    }
    if(gf.keyboard[39]){ //right arrow
        player.right();
        idle = false;
    }
    if(idle){
        player.idle();
    }
    
    player.update();
    var margin = 200;
    var playerPos = gf.x(player.div);
    if(playerPos...