Time for action – adding config.lua file
If no content size is specified, the content width and height returned will be the same as the physical screen width and height of the device. If you specify a different content width and height in config.lua, the content width and height will take on those values.
- In your text editor, create a new file called
config.luaand save it to your project folder. - Type in the following lines:
application = { content = { width = 320, height = 480, scale = "letterbox", fps = 60, }, } - Save and close your file.
What just happened?
The content width and height allow you to choose a virtual screen size that is independent of the physical device screen size. We have set the size to target the original iPhone since it displays the smallest dimensions across all the devices on both iOS and Android platforms. The original iPhone has dimensions of 320 x 480. With this configuration, it'll still scale evenly for the iPad, which has dimensions of 768 x 1024.
The scale used for this application is set to letterbox. It will uniformly scale up content as much as possible, while still showing all content on the screen. This will create a widescreen look, which will be compatible with the Droid, which has a longer screen than the iPhone 3GS.
We set fps = 60. By default, the frame rate is 30 fps. In this application, this will make the movement of the ball appear faster and allow us to increase the speed conveniently. We can stretch the frame rate to a maximum of 60 fps that Corona can allow.