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179 lines
5.6 KiB
HTML
179 lines
5.6 KiB
HTML
<!DOCTYPE html>
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<title>SourceBox Wiki</title>
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<script>
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const documentlist = ['/wiki/index.html', '/wiki/QScript/Introduction.html', '/wiki/QScript/Lua/Classes.html', '/wiki/QScript/Lua/Exports.html', '/wiki/QScript/Lua/Imports.html', '/wiki/QScript/Lua/Intro.html', '/wiki/QScript/Lua/Objects.html', '/wiki/QScript/Tutorial/Chapter1.html']
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const namelist = ['Wiki Intro', 'QScript Intro', 'Lua Classes', 'Lua Exports', 'Lua Imports', 'Lua Intro', 'Lua Objects', 'QScript Tutorial Chapter 1']
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<nav>
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<ul id="searchresults">
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</ul>
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<ul id="filetree">
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<li><a href="/wiki/index.html">Wiki Intro</a></li>
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<li><b onclick="toggleTree(this);">QScript</b>
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<ul class="nested">
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<li><a href="/wiki/QScript/Introduction.html">QScript Intro</a></li>
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<li><b onclick="toggleTree(this);">Lua</b>
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<ul class="nested">
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<li><a href="/wiki/QScript/Lua/Classes.html">Lua Classes</a></li>
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<li><a href="/wiki/QScript/Lua/Exports.html">Lua Exports</a></li>
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<li><a href="/wiki/QScript/Lua/Imports.html">Lua Imports</a></li>
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<li><a href="/wiki/QScript/Lua/Intro.html">Lua Intro</a></li>
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<li><a href="/wiki/QScript/Lua/Objects.html">Lua Objects</a></li>
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<li><b onclick="toggleTree(this);">Python</b>
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<li><b onclick="toggleTree(this);">Tutorial</b>
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<li><a href="/wiki/QScript/Tutorial/Chapter1.html">QScript Tutorial Chapter 1</a></li>
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</div>
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<div style="margin-left:200px;">
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<h1>Lua Classes</h1>
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<p>Let's start with an analogy. Imagine you want to make star-shaped cookies. You could of course, manually cut the baked cookie and then be left with a mess, or you could use a cookie cutter before baking it. In this analogy, the cookie is an object, the manual cutting method is using tables, and the cookie cutter is a class.</p>
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<p>Before explaining what an object is, let's first take a look at how you even make a class.</p>
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<p>To create a class, you first call the <code>class()</code> function like this:</p>
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<pre><code>my_class = class() -- Creates a class creator
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</code></pre>
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<p><code>my_class</code> becomes a class creator. You can think of it like a bowl of ingredients which you can add to by simply setting the values of it.</p>
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<pre><code>my_class = class() -- Creates a class creator
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my_class.MyVar = 50.0 -- Creates a variable inside the class
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function my_class.MyFunc(self,a) -- Creates a function inside the class
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return self.MyVar+a
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end
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</code></pre>
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<p>Once you are done with defining your class, you call the <code>finish()</code> function like this:</p>
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<pre><code>finish(my_class) -- Finishes the class
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</code></pre>
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<p><code>my_class</code> will turn into a normal class where you cannot add any more variables or functions to it. In other words, <code>my_class</code> will get "baked" and you cannot add any more ingredients to it.</p>
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<p>The <code>class()</code> function accepts another class as a parameter which will "inherit" the other class.</p>
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<p>In simple terms, every function and variable from the other class, will be copied into yours, without having to specify them all over again.</p>
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<pre><code>another_class = class(my_class) -- Inherits from my_class
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another_class.MyVar = 20.0 -- Changes the existing variable
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function another_class.NewFunc(self,b) -- Makes a new function
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return self.MyVar-b
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end
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finish(another_class) -- Finishes it
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</code></pre>
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<p>We can now move on to objects.</p>
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<hr />
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<p><a href="/wiki/QScript/Lua/Objects.html">Next -></a></p>
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</div> |