Book Image

HTML5 Game Development with GameMaker

By : Jason Lee Elliott
Book Image

HTML5 Game Development with GameMaker

By: Jason Lee Elliott

Overview of this book

The introduction of HTML5 has revolutionized the web browser as a legitimate gaming platform with unlimited potential. Making games for the browser has never been simpler, especially with GameMaker Studio. Developers have full control over asset management, built-in systems for physics, particles and path finding. In addition, it offers a rich scripting language and extensions for developers now enabling everyone to create games and monetize them quickly and easily.HTML5 Game Development with GameMaker will show you how to make and release browser based games using practical examples. This book utilizes GameMaker's powerful scripting language allowing you to create your first game in no time. With this guide you will develop a thorough skill set and a coherent understanding of the tools to develop games of increasing complexity, gradually enhancing your coding abilities and taking them to a whole new level. The GameMaker Studio environment allows you to jump right into building browser based games quickly and releasing them online. The chapters focus on core practical elements, such as, artificial intelligence and creating challenging boss battles. This book guides you on how to use advanced features easily and effectively, these include, data structures and demonstrating how to create rigid body physics with simple explanations and visual examples. By the end of this book you will have an in-depth knowledge of developing and publishing online social browser based games with GameMaker.
Table of Contents (16 chapters)
HTML5 Game Development with GameMaker
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Adding finishing details to the game


The game is now functionally complete, but there are a few elements left to polish up. To start, the player takes damage but never dies, nor is there a heads-up display (HUD) to show this. Let's create a quick Overlord.

  1. Create a new Object, obj_Overlord, with no sprite applied and persistence is checked.

  2. Add a Draw GUI event and a new Script for it, scr_Overlord_DrawGUI, with the following code:

    draw_healthbar(0, 0, 200, 16, health, c_black, c_red, c_green, 0, true, true);
    
    if (health <= 0)
    {
        with (obj_Player) { instance_destroy(); }
        room_goto(TitleScreen);
        instance_destroy();
    }

    First, we use the function draw_healthbar which you can see has a lot of parameters. The first four are the size and placement of a rectangular bar. Next is the variable to be used for how full the bar is, in our case, the global health variable. The next three are the background color, and the min/max colors. Next is the direction the bar should fall, zero being to...