Corona sdk pdf download

A balloon or a bomb will fail down the screen. If the player taps on the balloon they score a point, they tap on a bomb then the score will divided by 2, as a penalty.

To write the code you need to edit main. You can do this in any text editor. The first step in writing the game is to initialize the physics engine:. The code is fairly self-explanatory. The module physics is loaded and initialized, it is assigned to the variable physics. To enable the engine physics. Next we create some helpful variables which will be useful not only for this simple game, but also for more complex games.

As well as properties like contentHeight and contentWidth , the display object also has lots of useful functions. The newImage function reads an image file in this case a. Display objects are rendered in layers, so since this is the first image we are putting on the screen then it will always be the background unless the code explicitly does something to change that. The parameters halfW and halfH tell Corona to place the image in the middle.

At this point you can run the code in the emulator and see the background image. If you save the file then the emulator will notice that the file has changed and offer to relaunch. Since the user will score points for tapping on balloons, we need to initialize a score variable and display the score on the screen:.

The score will be kept in the imaginatively named variable score, and scoreText is the object which displays the score. Like newImage , newText put something on the screen, in this case text. Since scoreText is a global variable then we can change the text at any point. But we will get to that soon. The code above defines a function called balloonTouched which will be called every time a balloon is tapped.

Tap or touch events have several stages, many to support dragging. We want to remove the balloon and increment the score as soon as posible. Inside the if statement are four lines of code. Remember how I said that scoreText was global and could be accessed anywhere, well that is what we do here. Now for the first two lines. As the game progresses the number of these off-screen objects will steadily increase.

Therefore we need to have a mechanism which deletes objects once they are out of sight. That function will be called once per frame during the game. Once a balloon has been tapped then we need to delete it and remove the call that checks if the balloon has gone offscreen. The line event. When a touch event occurs one of the parameters of the listener function is the event parameter.

It tells the function about the event and what type of event it is, e. It also tells us which balloon was tapped, event. The removeSelf function does what it says it does, it deletes the object in this case a balloon. We will look at that in more detail when we come to write the offscreen listener function.

So, to recap. It then deletes the balloon, increments the score and displays the new score. As you can see the code is very similar with the exception that rather than incrementing the score, the score is multiplied by 0. The math. So if the player had a score of 3 and tapped a bomb then the new score would be 1, and not 1. I mentioned the offscreen function earlier.

This function will be called every frame to check if an object has gone off screen. No matter if you are an indie developer or a large publisher, you will never pay for core functionality. CoronaCards was designed to be added to existing native apps — it can be embedded in an existing app structure, so it does not control or own the main application stack.

See what you can do! Join over k developers worldwide using Corona to create hit mobile apps. The 2D Game Engine. Mature and time-tested Over the span of 8 years Corona has evolved into a mature, battle-tested framework. Lua-based Corona uses Lua, a powerful and easy-to-learn scripting language, backed up with extensive documentation. Speed and performance From bleeding-fast OpenGL graphics to the lightweight scripting power of Lua, Corona is optimized for performance at every core level.

No limits. Plugins for all needs Using Corona Native, you can even create and distribute powerful plugins for other Corona developers in the Corona Marketplace, exposing native platform features, support for third-party tools, and more. Easy setup Corona is elegant and inclusive: simply download and install Corona, start a new project, and start editing Lua code in your favorite IDE or text editor. The old Forums will remain down from th.

Many of you are curious how our transition is going. Here is a quick update as to its status. Google gave Corona users extra time to update their apps to bit. Are you ready? The 2D Game Engine. No limits Unlimited. Lua-based Lua is an open source scripting language designed to be lightweight, fast, yet also powerful. Plugins for all needs Select from numerous plugins which extend the Corona core for features like in-app advertising, analytics, media, and much more.

Cross-platform Develop for mobile, desktop, and connected TV devices with just one code base. Completely free No hidden fees, charges, or royalties. See your dream come to life. Speed and performance From bleeding-fast OpenGL graphics to the lightweight scripting power of Lua, Corona is optimized for performance at every core level.

Not only an engine But an entire ecosystem. Community More than , developers and an active, helpful forum are not just facts. Visit forum Marketplace Our marketplace is where you can easily find or distribute whatever you need to build the next blockbuster game or app.

Open source Corona's source code is now open for developers to add features to that they need and even contribute back to the core product. Read more Priority support Get priority support provided by our engineering team via our community Slack channel and email.