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<section class="tex2jax_ignore mathjax_ignore" id="objects">
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<h1>Objects<a class="headerlink" href="#objects" title="Permalink to this headline">¶</a></h1>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span>┌──────┐ │ ┌───────┐ ┌───────┐ ┌──────┐
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│Client├─┼──►│Session├───►│Account├──►│Object│
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└──────┘ │ └───────┘ └───────┘ └──────┘
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^
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</pre></div>
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</div>
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<p>All in-game objects in Evennia, be it characters, chairs, monsters, rooms or hand grenades are
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represented by an Evennia <em>Object</em>. Objects form the core of Evennia and is probably what you’ll
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spend most time working with. Objects are <a class="reference internal" href="Typeclasses.html"><span class="doc std std-doc">Typeclassed</span></a> entities.</p>
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<p>An Evennia Object is, by definition, a Python class that includes
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<a class="reference internal" href="../api/evennia.objects.objects.html#evennia.objects.objects.DefaultObject" title="evennia.objects.objects.DefaultObject"><span class="xref myst py py-class">evennia.objects.objects.DefaultObject</span></a> among its
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parents. Evennia defines several subclasses of <code class="docutils literal notranslate"><span class="pre">DefaultObject</span></code>:</p>
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<p>An Evennia Object is, by definition, a Python class that includes <a class="reference internal" href="../api/evennia.objects.objects.html#evennia.objects.objects.DefaultObject" title="evennia.objects.objects.DefaultObject"><span class="xref myst py py-class">evennia.objects.objects.DefaultObject</span></a> among its parents. Evennia defines several subclasses of <code class="docutils literal notranslate"><span class="pre">DefaultObject</span></code> in the following inheritance tree:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span> ┌────────────┐
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Evennia│ │ObjectParent│
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library│ └──────▲─────┘
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│ │
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┌─────────────┐ │ ┌──────┐ │
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│DefaultObject◄────────────────────┼────┤Object├──────┤
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└──────▲──────┘ │ └──────┘ │
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│ │ │
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│ ┌────────────────┐ │ ┌─────────┐ │
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├────────┤DefaultCharacter◄─┼────┤Character├───┤
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│ └────────────────┘ │ └─────────┘ │
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│ │ │
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│ ┌────────────────┐ │ ┌────┐ │
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├────────┤DefaultRoom ◄─┼────┤Room├────────┤
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│ └────────────────┘ │ └────┘ │
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│ │ │
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│ ┌────────────────┐ │ ┌────┐ │
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└────────┤DefaultExit ◄─┼────┤Exit├────────┘
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└────────────────┘ │ └────┘
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│
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│Game-dir
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</pre></div>
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</div>
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<p>Here, arrows indicate inheritance and point from-child-to-parent.</p>
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<p>So, for example <code class="docutils literal notranslate"><span class="pre">DefaultObjet</span></code> is a child of <code class="docutils literal notranslate"><span class="pre">DefaultCharacter</span></code> (in the Evennia library), which is a parent of <code class="docutils literal notranslate"><span class="pre">Character</span></code> (in the game dir). The class in the game-dir is the one you should modify for your game.</p>
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<blockquote>
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<div><p>Note the <code class="docutils literal notranslate"><span class="pre">ObjectParent</span></code> class. This is an empty mix-in that all classes in the game-dir inherits from. It’s where you put things you want <em>all</em> these classes to have.</p>
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</div></blockquote>
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<ul class="simple">
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<li><p><a class="reference internal" href="../api/evennia.objects.objects.html#evennia.objects.objects.DefaultCharacter" title="evennia.objects.objects.DefaultCharacter"><span class="xref myst py py-class">evennia.objects.objects.DefaultCharacter</span></a> -
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the normal in-game Character, controlled by a player.</p></li>
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<li><p><a class="reference internal" href="../api/evennia.objects.objects.html#evennia.objects.objects.DefaultCharacter" title="evennia.objects.objects.DefaultCharacter"><span class="xref myst py py-class">evennia.objects.objects.DefaultCharacter</span></a> - the normal in-game Character, controlled by a player.</p></li>
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<li><p><a class="reference internal" href="../api/evennia.objects.objects.html#evennia.objects.objects.DefaultRoom" title="evennia.objects.objects.DefaultRoom"><span class="xref myst py py-class">evennia.objects.objects.DefaultRoom</span></a> - a location in the game world.</p></li>
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<li><p><a class="reference internal" href="../api/evennia.objects.objects.html#evennia.objects.objects.DefaultExit" title="evennia.objects.objects.DefaultExit"><span class="xref myst py py-class">evennia.objects.objects.DefaultExit</span></a> - an entity that (usually) sits
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in a room and represents a one-way connection to another location.</p></li>
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<li><p><a class="reference internal" href="../api/evennia.objects.objects.html#evennia.objects.objects.DefaultExit" title="evennia.objects.objects.DefaultExit"><span class="xref myst py py-class">evennia.objects.objects.DefaultExit</span></a> - an entity that in a location (usually a Room). It represents a one-way connection to another location.</p></li>
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</ul>
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<p>You will usually not use the <code class="docutils literal notranslate"><span class="pre">Default*</span></code> parents themselves. In <code class="docutils literal notranslate"><span class="pre">mygame/typeclasses/</span></code> there are
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convenient subclasses to use. They are empty, and thus identical to
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the defaults. Tweaking them is one of the main ways to customize you game!</p>
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<p>Here are the import paths for the relevant child classes in the game dir</p>
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<ul class="simple">
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<li><p><code class="docutils literal notranslate"><span class="pre">mygame.typeclasses.objects.Object</span></code> (inherits from <code class="docutils literal notranslate"><span class="pre">DefaultObject</span></code>)</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">mygame.typeclasses.characters.Character</span></code> (inherits from <code class="docutils literal notranslate"><span class="pre">DefaultCharacter</span></code>)</p></li>
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@ -138,11 +166,8 @@ the defaults. Tweaking them is one of the main ways to customize you game!</p>
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</ul>
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<section id="how-to-create-your-own-object-types">
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<h2>How to create your own object types<a class="headerlink" href="#how-to-create-your-own-object-types" title="Permalink to this headline">¶</a></h2>
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<p>You can easily add your own in-game behavior by either modifying one of the typeclasses in
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your game dir or by inheriting from them.</p>
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<p>You can put your new typeclass directly in the relevant parent
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module, or you could organize your code in some other way. Here we assume we make a new module
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<code class="docutils literal notranslate"><span class="pre">mygame/typeclasses/flowers.py</span></code>:</p>
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<p>You can easily add your own in-game behavior by either modifying one of the typeclasses in your game dir or by inheriting from them.</p>
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<p>You can put your new typeclass directly in the relevant module, or you could organize your code in some other way. Here we assume we make a new module <code class="docutils literal notranslate"><span class="pre">mygame/typeclasses/flowers.py</span></code>:</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span> <span class="c1"># mygame/typeclasses/flowers.py</span>
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<span class="kn">from</span> <span class="nn">typeclasses.objects</span> <span class="kn">import</span> <span class="n">Object</span>
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@ -160,7 +185,7 @@ module, or you could organize your code in some other way. Here we assume we mak
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</div>
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<p>Now you just need to point to the class <em>Rose</em> with the <code class="docutils literal notranslate"><span class="pre">create</span></code> command
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to make a new rose:</p>
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<div class="highlight-none notranslate"><div class="highlight"><pre><span></span> @create/drop MyRose:flowers.Rose
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<div class="highlight-none notranslate"><div class="highlight"><pre><span></span> create/drop MyRose:flowers.Rose
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</pre></div>
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</div>
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<p>What the <code class="docutils literal notranslate"><span class="pre">create</span></code> command actually <em>does</em> is to use the <a class="reference internal" href="../api/evennia.utils.create.html#evennia.utils.create.create_object" title="evennia.utils.create.create_object"><span class="xref myst py py-func">evennia.create_object</span></a>
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@ -181,10 +206,8 @@ will usually want to change this at build time (using the <code class="docutils
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<section id="adding-common-functionality">
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<h2>Adding common functionality<a class="headerlink" href="#adding-common-functionality" title="Permalink to this headline">¶</a></h2>
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<p><code class="docutils literal notranslate"><span class="pre">Object</span></code>, <code class="docutils literal notranslate"><span class="pre">Character</span></code>, <code class="docutils literal notranslate"><span class="pre">Room</span></code> and <code class="docutils literal notranslate"><span class="pre">Exit</span></code> also inherit from <code class="docutils literal notranslate"><span class="pre">mygame.typeclasses.objects.ObjectParent</span></code>.
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This is an empty ‘mixin’ class. Optionally, you can modify this class if you want to easily add some <em>common</em> functionality to all
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your Objects, Characters, Rooms and Exits at once. You can still customize each subclass separately (see the Python
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docs on <a class="reference external" href="https://docs.python.org/3/tutorial/classes.html#multiple-inheritance">multiple inheritance</a> for details).</p>
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<p>For example:</p>
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This is an empty ‘mixin’ class. Optionally, you can modify this class if you want to easily add some <em>common</em> functionality to all your Objects, Characters, Rooms and Exits at once. You can still customize each subclass separately (see the Python docs on <a class="reference external" href="https://docs.python.org/3/tutorial/classes.html#multiple-inheritance">multiple inheritance</a> for details).</p>
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<p>Here is an example:</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="c1"># in mygame/typeclasses/objects.py</span>
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<span class="c1"># ... </span>
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@ -194,137 +217,65 @@ docs on <a class="reference external" href="https://docs.python.org/3/tutorial/c
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<span class="k">def</span> <span class="nf">at_pre_get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">getter</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
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<span class="c1"># make all entities by default un-pickable</span>
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<span class="k">return</span> <span class="kc">False</span>
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<span class="k">class</span> <span class="nc">Object</span><span class="p">(</span><span class="n">ObjectParent</span><span class="p">,</span> <span class="n">DefaultObject</span><span class="p">):</span>
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<span class="c1"># replaces at_pre_get with its own</span>
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<span class="k">def</span> <span class="nf">at_pre_get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">getter</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
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<span class="k">return</span> <span class="kc">True</span>
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<span class="c1"># each in their respective modules ...</span>
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<span class="k">class</span> <span class="nc">Character</span><span class="p">(</span><span class="n">ObjectParent</span><span class="p">,</span> <span class="n">DefaultCharacter</span><span class="p">):</span>
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<span class="c1"># will inherit at_pre_get from ObjectParent</span>
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<span class="k">pass</span>
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<span class="k">class</span> <span class="nc">Exit</span><span class="p">(</span><span class="n">ObjectParent</span><span class="p">,</span> <span class="n">DefaultExit</span><span class="p">):</span>
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<span class="c1"># Overrides and uses the DefaultExit version of at_pre_get instead</span>
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<span class="k">def</span> <span class="nf">at_pre_get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">getter</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
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<span class="k">return</span> <span class="n">DefaultExit</span><span class="o">.</span><span class="n">at_pre_get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">getter</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
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</pre></div>
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</div>
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<p>Now all of <code class="docutils literal notranslate"><span class="pre">Object</span></code>, <code class="docutils literal notranslate"><span class="pre">Exit</span></code>. <code class="docutils literal notranslate"><span class="pre">Room</span></code> and <code class="docutils literal notranslate"><span class="pre">Character</span></code> default to not being able to be picked up using the <code class="docutils literal notranslate"><span class="pre">get</span></code> command.</p>
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</section>
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<section id="properties-and-functions-on-objects">
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<h2>Properties and functions on Objects<a class="headerlink" href="#properties-and-functions-on-objects" title="Permalink to this headline">¶</a></h2>
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<p>Beyond the properties assigned to all <a class="reference internal" href="Typeclasses.html"><span class="doc std std-doc">typeclassed</span></a> objects (see that page for a list
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of those), the Object also has the following custom properties:</p>
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<ul class="simple">
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<li><p><code class="docutils literal notranslate"><span class="pre">aliases</span></code> - a handler that allows you to add and remove aliases from this object. Use
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<code class="docutils literal notranslate"><span class="pre">aliases.add()</span></code> to add a new alias and <code class="docutils literal notranslate"><span class="pre">aliases.remove()</span></code> to remove one.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">aliases</span></code> - a handler that allows you to add and remove aliases from this object. Use <code class="docutils literal notranslate"><span class="pre">aliases.add()</span></code> to add a new alias and <code class="docutils literal notranslate"><span class="pre">aliases.remove()</span></code> to remove one.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">location</span></code> - a reference to the object currently containing this object.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">home</span></code> is a backup location. The main motivation is to have a safe place to move the object to if
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its <code class="docutils literal notranslate"><span class="pre">location</span></code> is destroyed. All objects should usually have a home location for safety.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">destination</span></code> - this holds a reference to another object this object links to in some way. Its
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main use is for <a class="reference internal" href="#exits"><span class="std std-doc">Exits</span></a>, it’s otherwise usually unset.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">nicks</span></code> - as opposed to aliases, a <a class="reference internal" href="Nicks.html"><span class="doc std std-doc">Nick</span></a> holds a convenient nickname replacement for a
|
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real name, word or sequence, only valid for this object. This mainly makes sense if the Object is
|
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used as a game character - it can then store briefer shorts, example so as to quickly reference game
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commands or other characters. Use nicks.add(alias, realname) to add a new one.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">account</span></code> - this holds a reference to a connected <a class="reference internal" href="Accounts.html"><span class="doc std std-doc">Account</span></a> controlling this object (if
|
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any). Note that this is set also if the controlling account is <em>not</em> currently online - to test if
|
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an account is online, use the <code class="docutils literal notranslate"><span class="pre">has_account</span></code> property instead.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">sessions</span></code> - if <code class="docutils literal notranslate"><span class="pre">account</span></code> field is set <em>and the account is online</em>, this is a list of all active
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sessions (server connections) to contact them through (it may be more than one if multiple
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connections are allowed in settings).</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">has_account</span></code> - a shorthand for checking if an <em>online</em> account is currently connected to this
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object.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">contents</span></code> - this returns a list referencing all objects ‘inside’ this object (i,e. which has this
|
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object set as their <code class="docutils literal notranslate"><span class="pre">location</span></code>).</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">exits</span></code> - this returns all objects inside this object that are <em>Exits</em>, that is, has the
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<code class="docutils literal notranslate"><span class="pre">destination</span></code> property set.</p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">home</span></code> is a backup location. The main motivation is to have a safe place to move the object to if its <code class="docutils literal notranslate"><span class="pre">location</span></code> is destroyed. All objects should usually have a home location for safety.</p></li>
|
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<li><p><code class="docutils literal notranslate"><span class="pre">destination</span></code> - this holds a reference to another object this object links to in some way. Its main use is for <a class="reference internal" href="#exits"><span class="std std-doc">Exits</span></a>, it’s otherwise usually unset.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">nicks</span></code> - as opposed to aliases, a <a class="reference internal" href="Nicks.html"><span class="doc std std-doc">Nick</span></a> holds a convenient nickname replacement for a real name, word or sequence, only valid for this object. This mainly makes sense if the Object is used as a game character - it can then store briefer shorts, example so as to quickly reference game commands or other characters. Use nicks.add(alias, realname) to add a new one.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">account</span></code> - this holds a reference to a connected <a class="reference internal" href="Accounts.html"><span class="doc std std-doc">Account</span></a> controlling this object (if any). Note that this is set also if the controlling account is <em>not</em> currently online - to test if an account is online, use the <code class="docutils literal notranslate"><span class="pre">has_account</span></code> property instead.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">sessions</span></code> - if <code class="docutils literal notranslate"><span class="pre">account</span></code> field is set <em>and the account is online</em>, this is a list of all active sessions (server connections) to contact them through (it may be more than one if multiple connections are allowed in settings).</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">has_account</span></code> - a shorthand for checking if an <em>online</em> account is currently connected to this object.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">contents</span></code> - this returns a list referencing all objects ‘inside’ this object (i,e. which has this object set as their <code class="docutils literal notranslate"><span class="pre">location</span></code>).</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">exits</span></code> - this returns all objects inside this object that are <em>Exits</em>, that is, has the <code class="docutils literal notranslate"><span class="pre">destination</span></code> property set.</p></li>
|
||||
</ul>
|
||||
<p>The last two properties are special:</p>
|
||||
<ul class="simple">
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">cmdset</span></code> - this is a handler that stores all <a class="reference internal" href="Command-Sets.html"><span class="doc std std-doc">command sets</span></a> defined on the
|
||||
object (if any).</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">cmdset</span></code> - this is a handler that stores all <a class="reference internal" href="Command-Sets.html"><span class="doc std std-doc">command sets</span></a> defined on the object (if any).</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">scripts</span></code> - this is a handler that manages <a class="reference internal" href="Scripts.html"><span class="doc std std-doc">Scripts</span></a> attached to the object (if any).</p></li>
|
||||
</ul>
|
||||
<p>The Object also has a host of useful utility functions. See the function headers in
|
||||
<code class="docutils literal notranslate"><span class="pre">src/objects/objects.py</span></code> for their arguments and more details.</p>
|
||||
<p>The Object also has a host of useful utility functions. See the function headers in <code class="docutils literal notranslate"><span class="pre">src/objects/objects.py</span></code> for their arguments and more details.</p>
|
||||
<ul class="simple">
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">msg()</span></code> - this function is used to send messages from the server to an account connected to this
|
||||
object.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">msg()</span></code> - this function is used to send messages from the server to an account connected to this object.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">msg_contents()</span></code> - calls <code class="docutils literal notranslate"><span class="pre">msg</span></code> on all objects inside this object.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">search()</span></code> - this is a convenient shorthand to search for a specific object, at a given location
|
||||
or globally. It’s mainly useful when defining commands (in which case the object executing the
|
||||
command is named <code class="docutils literal notranslate"><span class="pre">caller</span></code> and one can do <code class="docutils literal notranslate"><span class="pre">caller.search()</span></code> to find objects in the room to operate
|
||||
on).</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">search()</span></code> - this is a convenient shorthand to search for a specific object, at a given location or globally. It’s mainly useful when defining commands (in which case the object executing the command is named <code class="docutils literal notranslate"><span class="pre">caller</span></code> and one can do <code class="docutils literal notranslate"><span class="pre">caller.search()</span></code> to find objects in the room to operate on).</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">execute_cmd()</span></code> - Lets the object execute the given string as if it was given on the command line.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">move_to</span></code> - perform a full move of this object to a new location. This is the main move method
|
||||
and will call all relevant hooks, do all checks etc.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">move_to</span></code> - perform a full move of this object to a new location. This is the main move method and will call all relevant hooks, do all checks etc.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">clear_exits()</span></code> - will delete all <a class="reference internal" href="#exits"><span class="std std-doc">Exits</span></a> to <em>and</em> from this object.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">clear_contents()</span></code> - this will not delete anything, but rather move all contents (except Exits) to
|
||||
their designated <code class="docutils literal notranslate"><span class="pre">Home</span></code> locations.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">delete()</span></code> - deletes this object, first calling <code class="docutils literal notranslate"><span class="pre">clear_exits()</span></code> and
|
||||
<code class="docutils literal notranslate"><span class="pre">clear_contents()</span></code>.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">clear_contents()</span></code> - this will not delete anything, but rather move all contents (except Exits) to their designated <code class="docutils literal notranslate"><span class="pre">Home</span></code> locations.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">delete()</span></code> - deletes this object, first calling <code class="docutils literal notranslate"><span class="pre">clear_exits()</span></code> and <code class="docutils literal notranslate"><span class="pre">clear_contents()</span></code>.</p></li>
|
||||
</ul>
|
||||
<p>The Object Typeclass defines many more <em>hook methods</em> beyond <code class="docutils literal notranslate"><span class="pre">at_object_creation</span></code>. Evennia calls
|
||||
these hooks at various points. When implementing your custom objects, you will inherit from the
|
||||
base parent and overload these hooks with your own custom code. See <code class="docutils literal notranslate"><span class="pre">evennia.objects.objects</span></code> for an
|
||||
updated list of all the available hooks or the <a class="reference internal" href="../api/evennia.objects.objects.html#evennia.objects.objects.DefaultObject" title="evennia.objects.objects.DefaultObject"><span class="xref myst py py-class">API for DefaultObject here</span></a>.</p>
|
||||
<p>The Object Typeclass defines many more <em>hook methods</em> beyond <code class="docutils literal notranslate"><span class="pre">at_object_creation</span></code>. Evennia calls these hooks at various points. When implementing your custom objects, you will inherit from the base parent and overload these hooks with your own custom code. See <code class="docutils literal notranslate"><span class="pre">evennia.objects.objects</span></code> for an updated list of all the available hooks or the <a class="reference internal" href="../api/evennia.objects.objects.html#evennia.objects.objects.DefaultObject" title="evennia.objects.objects.DefaultObject"><span class="xref myst py py-class">API for DefaultObject here</span></a>.</p>
|
||||
</section>
|
||||
<section id="subclasses-of-object">
|
||||
<h2>Subclasses of <code class="docutils literal notranslate"><span class="pre">Object</span></code><a class="headerlink" href="#subclasses-of-object" title="Permalink to this headline">¶</a></h2>
|
||||
<p>There are three special subclasses of <em>Object</em> in default Evennia - <em>Characters</em>, <em>Rooms</em> and
|
||||
<em>Exits</em>. The reason they are separated is because these particular object types are fundamental,
|
||||
something you will always need and in some cases requires some extra attention in order to be
|
||||
recognized by the game engine (there is nothing stopping you from redefining them though). In
|
||||
practice they are all pretty similar to the base Object.</p>
|
||||
<p>There are three special subclasses of <em>Object</em> in default Evennia - <em>Characters</em>, <em>Rooms</em> and <em>Exits</em>. The reason they are separated is because these particular object types are fundamental, something you will always need and in some cases requires some extra attention in order to be recognized by the game engine (there is nothing stopping you from redefining them though). In practice they are all pretty similar to the base Object.</p>
|
||||
<section id="characters">
|
||||
<h3>Characters<a class="headerlink" href="#characters" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Characters are objects controlled by <a class="reference internal" href="Accounts.html"><span class="doc std std-doc">Accounts</span></a>. When a new Account
|
||||
logs in to Evennia for the first time, a new <code class="docutils literal notranslate"><span class="pre">Character</span></code> object is created and
|
||||
the Account object is assigned to the <code class="docutils literal notranslate"><span class="pre">account</span></code> attribute. A <code class="docutils literal notranslate"><span class="pre">Character</span></code> object
|
||||
must have a <a class="reference internal" href="Command-Sets.html"><span class="doc std std-doc">Default Commandset</span></a> set on itself at
|
||||
creation, or the account will not be able to issue any commands! If you just
|
||||
inherit your own class from <code class="docutils literal notranslate"><span class="pre">evennia.DefaultCharacter</span></code> and make sure to use
|
||||
<code class="docutils literal notranslate"><span class="pre">super()</span></code> to call the parent methods you should be fine. In
|
||||
<code class="docutils literal notranslate"><span class="pre">mygame/typeclasses/characters.py</span></code> is an empty <code class="docutils literal notranslate"><span class="pre">Character</span></code> class ready for you
|
||||
to modify.</p>
|
||||
<p>Characters are objects controlled by <a class="reference internal" href="Accounts.html"><span class="doc std std-doc">Accounts</span></a>. When a new Account logs in to Evennia for the first time, a new <code class="docutils literal notranslate"><span class="pre">Character</span></code> object is created and the Account object is assigned to the <code class="docutils literal notranslate"><span class="pre">account</span></code> attribute. A <code class="docutils literal notranslate"><span class="pre">Character</span></code> object must have a <a class="reference internal" href="Command-Sets.html"><span class="doc std std-doc">Default Commandset</span></a> set on itself at creation, or the account will not be able to issue any commands! If you just inherit your own class from <code class="docutils literal notranslate"><span class="pre">evennia.DefaultCharacter</span></code> and make sure to use <code class="docutils literal notranslate"><span class="pre">super()</span></code> to call the parent methods you should be fine. In <code class="docutils literal notranslate"><span class="pre">mygame/typeclasses/characters.py</span></code> is an empty <code class="docutils literal notranslate"><span class="pre">Character</span></code> class ready for you to modify.</p>
|
||||
</section>
|
||||
<section id="rooms">
|
||||
<h3>Rooms<a class="headerlink" href="#rooms" title="Permalink to this headline">¶</a></h3>
|
||||
<p><em>Rooms</em> are the root containers of all other objects. The only thing really separating a room from
|
||||
any other object is that they have no <code class="docutils literal notranslate"><span class="pre">location</span></code> of their own and that default commands like <code class="docutils literal notranslate"><span class="pre">@dig</span></code>
|
||||
creates objects of this class - so if you want to expand your rooms with more functionality, just
|
||||
inherit from <code class="docutils literal notranslate"><span class="pre">ev.DefaultRoom</span></code>. In <code class="docutils literal notranslate"><span class="pre">mygame/typeclasses/rooms.py</span></code> is an empty <code class="docutils literal notranslate"><span class="pre">Room</span></code> class ready for
|
||||
you to modify.</p>
|
||||
<p><em>Rooms</em> are the root containers of all other objects. The only thing really separating a room from any other object is that they have no <code class="docutils literal notranslate"><span class="pre">location</span></code> of their own and that default commands like <code class="docutils literal notranslate"><span class="pre">@dig</span></code> creates objects of this class - so if you want to expand your rooms with more functionality, just inherit from <code class="docutils literal notranslate"><span class="pre">ev.DefaultRoom</span></code>. In <code class="docutils literal notranslate"><span class="pre">mygame/typeclasses/rooms.py</span></code> is an empty <code class="docutils literal notranslate"><span class="pre">Room</span></code> class ready for you to modify.</p>
|
||||
</section>
|
||||
<section id="exits">
|
||||
<h3>Exits<a class="headerlink" href="#exits" title="Permalink to this headline">¶</a></h3>
|
||||
<p><em>Exits</em> are objects connecting other objects (usually <em>Rooms</em>) together. An object named <em>North</em> or
|
||||
<em>in</em> might be an exit, as well as <em>door</em>, <em>portal</em> or <em>jump out the window</em>. An exit has two things
|
||||
that separate them from other objects. Firstly, their <em>destination</em> property is set and points to a
|
||||
valid object. This fact makes it easy and fast to locate exits in the database. Secondly, exits
|
||||
define a special <a class="reference internal" href="Commands.html"><span class="doc std std-doc">Transit Command</span></a> on themselves when they are created. This command is
|
||||
named the same as the exit object and will, when called, handle the practicalities of moving the
|
||||
character to the Exits’s <em>destination</em> - this allows you to just enter the name of the exit on its
|
||||
own to move around, just as you would expect.</p>
|
||||
<p>The exit functionality is all defined on the Exit typeclass, so you could in principle completely
|
||||
change how exits work in your game (it’s not recommended though, unless you really know what you are
|
||||
doing). Exits are <a class="reference internal" href="Locks.html"><span class="doc std std-doc">locked</span></a> using an access_type called <em>traverse</em> and also make use of a few
|
||||
hook methods for giving feedback if the traversal fails. See <code class="docutils literal notranslate"><span class="pre">evennia.DefaultExit</span></code> for more info.
|
||||
In <code class="docutils literal notranslate"><span class="pre">mygame/typeclasses/exits.py</span></code> there is an empty <code class="docutils literal notranslate"><span class="pre">Exit</span></code> class for you to modify.</p>
|
||||
<p><em>Exits</em> are objects connecting other objects (usually <em>Rooms</em>) together. An object named <em>North</em> or <em>in</em> might be an exit, as well as <em>door</em>, <em>portal</em> or <em>jump out the window</em>. An exit has two things that separate them from other objects. Firstly, their <em>destination</em> property is set and points to a valid object. This fact makes it easy and fast to locate exits in the database. Secondly, exits define a special <a class="reference internal" href="Commands.html"><span class="doc std std-doc">Transit Command</span></a> on themselves when they are created. This command is named the same as the exit object and will, when called, handle the practicalities of moving the character to the Exits’s <em>destination</em> - this allows you to just enter the name of the exit on its own to move around, just as you would expect.</p>
|
||||
<p>The exit functionality is all defined on the Exit typeclass, so you could in principle completely change how exits work in your game (it’s not recommended though, unless you really know what you are doing). Exits are <a class="reference internal" href="Locks.html"><span class="doc std std-doc">locked</span></a> using an access_type called <em>traverse</em> and also make use of a few hook methods for giving feedback if the traversal fails. See <code class="docutils literal notranslate"><span class="pre">evennia.DefaultExit</span></code> for more info. In <code class="docutils literal notranslate"><span class="pre">mygame/typeclasses/exits.py</span></code> there is an empty <code class="docutils literal notranslate"><span class="pre">Exit</span></code> class for you to modify.</p>
|
||||
<p>The process of traversing an exit is as follows:</p>
|
||||
<ol class="simple">
|
||||
<li><p>The traversing <code class="docutils literal notranslate"><span class="pre">obj</span></code> sends a command that matches the Exit-command name on the Exit object. The
|
||||
<a class="reference internal" href="Commands.html"><span class="doc std std-doc">cmdhandler</span></a> detects this and triggers the command defined on the Exit. Traversal always
|
||||
involves the “source” (the current location) and the <code class="docutils literal notranslate"><span class="pre">destination</span></code> (this is stored on the Exit
|
||||
object).</p></li>
|
||||
<li><p>The traversing <code class="docutils literal notranslate"><span class="pre">obj</span></code> sends a command that matches the Exit-command name on the Exit object. The <a class="reference internal" href="Commands.html"><span class="doc std std-doc">cmdhandler</span></a> detects this and triggers the command defined on the Exit. Traversal always involves the “source” (the current location) and the <code class="docutils literal notranslate"><span class="pre">destination</span></code> (this is stored on the Exit object).</p></li>
|
||||
<li><p>The Exit command checks the <code class="docutils literal notranslate"><span class="pre">traverse</span></code> lock on the Exit object</p></li>
|
||||
<li><p>The Exit command triggers <code class="docutils literal notranslate"><span class="pre">at_traverse(obj,</span> <span class="pre">destination)</span></code> on the Exit object.</p></li>
|
||||
<li><p>In <code class="docutils literal notranslate"><span class="pre">at_traverse</span></code>, <code class="docutils literal notranslate"><span class="pre">object.move_to(destination)</span></code> is triggered. This triggers the following hooks,
|
||||
in order:</p>
|
||||
<li><p>In <code class="docutils literal notranslate"><span class="pre">at_traverse</span></code>, <code class="docutils literal notranslate"><span class="pre">object.move_to(destination)</span></code> is triggered. This triggers the following hooks, in order:</p>
|
||||
<ol class="simple">
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">obj.at_pre_move(destination)</span></code> - if this returns False, move is aborted.</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">origin.at_pre_leave(obj,</span> <span class="pre">destination)</span></code></p></li>
|
||||
|
|
@ -337,9 +288,7 @@ in order:</p>
|
|||
</li>
|
||||
<li><p>On the Exit object, <code class="docutils literal notranslate"><span class="pre">at_post_traverse(obj,</span> <span class="pre">source)</span></code> is triggered.</p></li>
|
||||
</ol>
|
||||
<p>If the move fails for whatever reason, the Exit will look for an Attribute <code class="docutils literal notranslate"><span class="pre">err_traverse</span></code> on itself
|
||||
and display this as an error message. If this is not found, the Exit will instead call
|
||||
<code class="docutils literal notranslate"><span class="pre">at_failed_traverse(obj)</span></code> on itself.</p>
|
||||
<p>If the move fails for whatever reason, the Exit will look for an Attribute <code class="docutils literal notranslate"><span class="pre">err_traverse</span></code> on itself and display this as an error message. If this is not found, the Exit will instead call <code class="docutils literal notranslate"><span class="pre">at_failed_traverse(obj)</span></code> on itself.</p>
|
||||
</section>
|
||||
</section>
|
||||
</section>
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue