It calls doubleIt() for each iteration. If the return value is 10 (i.e. when i is 5) then the code prints out “ten” otherwise it just prints out the result of doubleIt().
If you have any coding experience then the example code should be easy enough onesto follow. If you are looking preciso learn some basic programming then I suggest you use some of the resources linked above preciso hone you skills.
Writing the gioco
Writing basic programs mediante Corona is simple. You only need concern yourself with one file, main.lua, and let Corona do all the heavy lifting. The partita we are going sicuro write is per simple “tap” partita. Per balloon or per bomb will fail down the screen. If the player taps on the balloon they score a point, they tap on verso bomb then the conteggio will divided by 2, as verso penalty. Sicuro write the code you need to edit main.lua. You can do this sopra any text editor.
The Ruota SDK has per built-durante 2D physics engine, which makes building games very easy. The first step per writing the game is sicuro initialize the physics engine:
The code is fairly self-explanatory. The diversifie physics is loaded and initialized, it is assigned puro the variable physics. Sicuro enable the engine physics.start() is called.
Next we create some helpful variables which will be useful not only for this simple partita, but also for more complex games. halfW and halfH hold the values for half of the screen width and half of the screen height:
As well as properties like contentHeight and contentWidth, the schermo object also has lots of useful functions. The newImage() function reads an image file (per this case per .png) and displays it on the screen. Video 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 sicuro change that). The parameters halfW and halfH tell Corona onesto place the image con the middle.
The first line of balloonTouched() checks we are con the “began” phase
At this point you can run the code mediante the emulator and see the preparazione image. If you save the file then the emulator will topo that the file has changed and offer sicuro relaunch. If that doesn’t happen then use File->Relaunch.
Since the user will conteggio points for tapping on balloons, we need onesto initialize verso risultato variable and monitor the conteggio on the screen:
The score will be kept mediante the imaginatively named variable conteggio, and scoreText is the object which displays the punteggio. Like romancetale sito mobile newImage(), newText() put something on the screen, durante this case text. Since scoreText is per global variable then we can change the text at any point. But we will get puro that soon.
The code above defines a function called balloonTouched() which will be called every time per balloon is tapped. We haven’t yet told Disco esatto call this function every time the balloon is tapped, that will quale later, but when we do this is the function that gets called.
Tap or touch events have several stages, many sicuro support dragging. The user puts their finger on an object, this is the “began” phase. If they slide their finger per any direction, that is the “moved” phase. When the user lifts their finger from the screen, that is the “ended” phase.
We want preciso remove the balloon and increment the score as soon as posible. If the function is called again for other phases like “ended” then the function does nothing.