Getting Started in Android Game Development with libgdx – Create a Working Prototype in a Day – Tutorial Part 1. Create games with LIBGDX library in Android (1) This is a continuation of this tutorial:Getting Started in Android Game Development with libgdx – Create a Working Prototype in a Day – Tutorial Part 1That 1st part of the tutorial belongs entirely to obviam.net and I am in no way associated with them.Since the second part hasn't appeared for almost a year and I've seen many comments asking for it, I decided to post my own version of finishing the game for anyone interested.
Quick reminder of where the game was left of If you've carefully read the tutorial on obviam.net then right now you probably already have the project in Eclipse with both versions: Desktop and Android. So far, it draws the world (blocks and the main character, Bob) and allows you basic movements. I noticed a lot of unanswered questions in the first tutorial. If you still have problems, post here and I will help you to get the game running so that you can continue along! First objective: add terrain interaction 1. 2. 3. Here is the new code for Bob's update method: Create games with LIBGDX library in Android (2) - short physics lesson.
This is a preview before the next improvement in our "Bob" game.
Since our next step is to implement Bob's jumping ability, I consider it usefull to discuss a few physics aspects before moving on. The game loop is implementing character's position update every couple of miliseconds. This means that the character doesn't actually move on the screen continuously, but rather at discrete time intervals. However, these intervals are so small that the human eye perceives a continuous movement. So all we need to do is translate some simple mechanics formulas in discrete time. If you skipped those physics class in high-school , don't worry as it's not at all complicated. Moving at a constant speed When moving left and right, Bob's speed is constant and changing his position is very simple.
Let v be the constant speed (velocity). X = v*t where x is the distance traveled in a time interval equal to t. How to use this formula? First of all, you need to pay attention at the length and time units you use. Create games with LIBGDX library in Android (3) - game menu basics. Following feedback from blog visitors, I decided to make a short introduction of how to create a game menu.
I'll only cover the basics here and create a very simple menu: a button labeled "START GAME" . Once pressed, it immediately start the game screen. More complex menus will be created towards the end of the game development process, this is only a preview for those anxious to give the game a nicer look. Every Android application contains one or more activities. The game screen we created, which draws our world and Bob in it, and its entire management (updating, rendering, event handling), those are all contained into a single activity, named StarAssaultActivity. One Game, Many Frameworks: LibGDX. We finally arrive at Android, and my favorite framework: LibGDX.
Unlike the most recent tutorials in which I did not go too deep into the code of the game because I had already discussed OpenGL or Objective-C in previous tutorials; for this one I’ve decided to do a full-on tutorial. One of those oh-my-God-he-never-stops-talking tutorials. LibGdx to my mind is the most simple to learn of the frameworks, and is in a way the most complete: it supports Particle Systems, Tile Maps, Box2D, 3D objects, Fonts, UI elements, among other things… And it is the most optimized OpenGL framework/wrapper you will find anywhere. And if you have already developed for Android and have used frameworks like AndEngine, you will know how important optimization is and how lame frameworks can be! Also, I will not go very deep into how to code in Java, because I did that already. And now, the stuff you will need in order to run the code. Install Java. Android Game Development with libgdx – Prototype in a day, Part 1a.
In this article I will take a detour from the building blocks of a game engine and components and I will demonstrate how to prototype a game quickly using the libgdx library.
What you will learn: Create a very simple 2D shooter platformer game.What a complete game architecture looks like.How to use 2D Graphics with OpenGL without knowing anything about OpenGL.What different entities make up a game and how they are tied together in a game world.How to add sound to your game.How to build your game on the desktop and deploy in onto Android – yes, it’s that magic. Steps to create a game 1. Android Game Development with libgdx – Prototype in a day, Part 1b. Creating the Game and Displaying the World To render the world onto the screen, we need to create a screen for it and tell it to render the world.
