This means in order to use Gideros either you can program in LUA or you want to learn to do it. Gideros mobile is based on the LUA programming language and it is basically an environment to work with it. Gideros features a powerful 2D engine although it completely lacks 3D support.
It is not as fully featured as many other game engines and coding is something essential in order to make a game with it. This guide is by no means complete, and we suggest you have a good book covering Lua.Gideros mobile is a 2D game engine based in the LUA programming language. The returned value is either “file” if the file is open, “closed” if the file is closed or nil if the fileHandle was not found. Implicit is passing the fileHandle to the function for file operations and are generally seen starting with io. Explicit is when the file to be worked on is specified, it is seen in the form of file: type commands. There are two ways to reference these functions, the explicit and the implicit. For all of these, there’s an API, the File I/O API. There could be other more complex examples where one might have levels stored in files. Some examples would include the current level, a high score, the player‘s name and so on. Persisting data in simple terms means retaining the data even after the app is exited. In an app, there always comes a point where you might want to persist some data. Returns a string which is the reverse of the string s. Returns an iterator function that, each time it is called, returns the next capture from pattern over string s.Ĭhanges all characters of a string to lowercase.Ĭhanges all characters of a string to uppercase. Returns a formatted version of its variable number of arguments following the description given in its first argument (which must be a string). If it finds a match, then find returns the indices of s where this occurrence starts and ends otherwise, it returns nil Looks for the first match of pattern in the string s. The default value for i is 1 the default value for j is i. Returns the internal numerical codes of the characters s, s, Have a look at them, and then study the examples below. The following table gives an overview of string manipulation commands.
Note that the string library assumes one-byte character encoding. Unlike C, the first character of a string has an index of 1 by default. Lua has a powerful set of string manipulation functions, such as finding and extracting substrings. Try the function above, this time with values 4,5,5.
#GIDEROS BASICS CODE#
Let’s start with the simplest Lua code which is printing to the console:įunction calculate ( w, d, h ) if h > 4 then print ( "The height of the room cannot be more than 4." ) return end volume = w * d * h return volume end - calling the function to calculate the volume of the room print ( calculate ( 4, 3, 4 ) ) Gideros Studio, with Lua, produces fast and lightweight applications and games.ĭespite the size of the Lua interpreter (about 150Kb in size), Lua is very rich and can be extended. In Gideros Studio, you usually write your code in Lua however, you can also extend your applications with other languages like Objective-C, C++, C or Java. Lua is mentioned as the fastest language among all interpreted scripting languages. The advantages of Lua are its simplicity and its speed. Lua is used in commercial applications, including Adobe's Photoshop Lightroom, World of Warcraft, Far Cry, Garry's Mod, Supreme Commander and Sonic the Hedgehog. Lua was created in 1993 by Roberto Ierusalimschy, Luiz Henrique de Figueiredo, and Waldemar Celes, members of the Computer Graphics Technology Group at PUC-Rio, the Pontifical University of Rio de Janeiro.
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