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<li><a class="reference internal" href="#">Dice roller</a><ul>
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<li><a class="reference internal" href="#installation">Installation:</a></li>
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<li><a class="reference internal" href="#usage">Usage:</a></li>
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<li><a class="reference internal" href="#rolling-dice-from-code">Rolling dice from code</a><ul>
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<li><a class="reference internal" href="#dice-pools-and-other-variations">Dice pools and other variations</a></li>
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<li><a class="reference internal" href="#get-all-roll-details">Get all roll details</a></li>
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</ul>
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<section class="tex2jax_ignore mathjax_ignore" id="dice-roller">
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<h1>Dice roller<a class="headerlink" href="#dice-roller" title="Permalink to this headline">¶</a></h1>
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<p>Contribution by Griatch, 2012, 2023</p>
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<p>A dice roller for any number and side of dice. Adds in-game dice rolling
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(like <code class="docutils literal notranslate"><span class="pre">roll</span> <span class="pre">2d10</span> <span class="pre">+</span> <span class="pre">1</span></code>) as well as conditionals (roll under/over/equal to a target)
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and functions for rolling dice in code. Command also supports hidden or secret
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rolls for use by a human game master.</p>
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<section id="installation">
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<h2>Installation:<a class="headerlink" href="#installation" title="Permalink to this headline">¶</a></h2>
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<p>Add the <code class="docutils literal notranslate"><span class="pre">CmdDice</span></code> command from this module to your character’s cmdset
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(and then restart the server):</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="c1"># in mygame/commands/default_cmdsets.py</span>
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<span class="c1"># ...</span>
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<span class="kn">from</span> <span class="nn">evennia.contrib.rpg</span> <span class="kn">import</span> <span class="n">dice</span> <span class="o"><---</span>
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<span class="k">class</span> <span class="nc">CharacterCmdSet</span><span class="p">(</span><span class="n">default_cmds</span><span class="o">.</span><span class="n">CharacterCmdSet</span><span class="p">):</span>
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<span class="c1"># ...</span>
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<span class="k">def</span> <span class="nf">at_cmdset_creation</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="c1"># ...</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">dice</span><span class="o">.</span><span class="n">CmdDice</span><span class="p">())</span> <span class="c1"># <---</span>
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</pre></div>
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</div>
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</section>
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<section id="usage">
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<h2>Usage:<a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h2>
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<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>> roll 1d100 + 2
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> roll 1d20
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> roll 1d20 - 4
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</pre></div>
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</div>
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<p>The result of the roll will be echoed to the room.</p>
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<p>One can also specify a standard Python operator in order to specify
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eventual target numbers and get results in a fair and guaranteed
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unbiased way. For example:</p>
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<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>> roll 2d6 + 2 < 8
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</pre></div>
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</div>
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<p>Rolling this will inform all parties if roll was indeed below 8 or not.</p>
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<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>> roll/hidden 1d100
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</pre></div>
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</div>
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<p>Informs the room that the roll is being made without telling what the result
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was.</p>
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<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>> roll/secret 1d20
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</pre></div>
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</div>
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<p>This a hidden roll that does not inform the room it happened.</p>
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</section>
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<section id="rolling-dice-from-code">
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<h2>Rolling dice from code<a class="headerlink" href="#rolling-dice-from-code" title="Permalink to this headline">¶</a></h2>
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<p>You can specify the first argument as a string on standard RPG d-syntax (NdM,
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where N is the number of dice to roll, and M is the number sides per dice):</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">evennia.contrib.rpg.dice</span> <span class="kn">import</span> <span class="n">roll</span>
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<span class="n">roll</span><span class="p">(</span><span class="s2">"3d10 + 2"</span><span class="p">)</span>
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</pre></div>
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</div>
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<p>You can also give a conditional (you’ll then get a <code class="docutils literal notranslate"><span class="pre">True</span></code>/<code class="docutils literal notranslate"><span class="pre">False</span></code> back):</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">roll</span><span class="p">(</span><span class="s2">"2d6 - 1 >= 10"</span><span class="p">)</span>
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</pre></div>
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</div>
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<p>If you specify the first argument as an integer, it’s interpret as the number of
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dice to roll and you can then build the roll more explicitly. This can be
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useful if you are using the roller together with some other system and want to
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construct the roll from components.</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">roll</span><span class="p">(</span><span class="n">dice</span><span class="p">,</span> <span class="n">dicetype</span><span class="o">=</span><span class="mi">6</span><span class="p">,</span> <span class="n">modifier</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">conditional</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">return_tuple</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span>
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<span class="n">max_dicenum</span><span class="o">=</span><span class="mi">10</span><span class="p">,</span> <span class="n">max_dicetype</span><span class="o">=</span><span class="mi">1000</span><span class="p">)</span>
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</pre></div>
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</div>
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<p>Here’s how to roll <code class="docutils literal notranslate"><span class="pre">3d10</span> <span class="pre">+</span> <span class="pre">2</span></code> with explicit syntax:</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">roll</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="n">modifier</span><span class="o">=</span><span class="p">(</span><span class="s2">"+"</span><span class="p">,</span> <span class="mi">2</span><span class="p">))</span>
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</pre></div>
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</div>
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<p>Here’s how to roll <code class="docutils literal notranslate"><span class="pre">2d6</span> <span class="pre">-</span> <span class="pre">1</span> <span class="pre">>=</span> <span class="pre">10</span></code> (you’ll get back <code class="docutils literal notranslate"><span class="pre">True</span></code>/<code class="docutils literal notranslate"><span class="pre">False</span></code> back):</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">roll</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="n">modifier</span><span class="o">=</span><span class="p">(</span><span class="s2">"-"</span><span class="p">,</span> <span class="mi">1</span><span class="p">),</span> <span class="n">conditional</span><span class="o">=</span><span class="p">(</span><span class="s2">">="</span><span class="p">,</span> <span class="mi">10</span><span class="p">))</span>
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</pre></div>
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</div>
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<section id="dice-pools-and-other-variations">
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<h3>Dice pools and other variations<a class="headerlink" href="#dice-pools-and-other-variations" title="Permalink to this headline">¶</a></h3>
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<p>You can only roll one set of dice at a time. If your RPG requires you to roll multiple
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sets of dice and combine them in more advanced ways, you can do so with multiple
|
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<code class="docutils literal notranslate"><span class="pre">roll()</span></code> calls. Depending on what you need, you may just want to express this as
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helper functions specific for your game.</p>
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<p>Here’s how to roll a D&D advantage roll (roll d20 twice, pick highest):</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span> <span class="kn">from</span> <span class="nn">evennia.contrib.rpg.dice</span> <span class="kn">import</span> <span class="n">roll</span>
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<span class="k">def</span> <span class="nf">roll_d20_with_advantage</span><span class="p">():</span>
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<span class="w"> </span><span class="sd">"""Get biggest result of two d20 rolls"""</span>
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<span class="k">return</span> <span class="nb">max</span><span class="p">(</span><span class="n">roll</span><span class="p">(</span><span class="s2">"d20"</span><span class="p">),</span> <span class="n">roll</span><span class="p">(</span><span class="s2">"d20"</span><span class="p">))</span>
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</pre></div>
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</div>
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<p>Here’s an example of a Free-League style dice pool, where you roll a pile of d6
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and want to know how many 1s and sixes you get:</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">evennia.contrib.rpg.dice</span> <span class="kn">import</span> <span class="n">roll</span>
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<span class="k">def</span> <span class="nf">roll_dice_pool</span><span class="p">(</span><span class="n">poolsize</span><span class="p">):</span>
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<span class="w"> </span><span class="sd">"""Return (number_of_ones, number_of_sixes)"""</span>
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<span class="n">results</span> <span class="o">=</span> <span class="p">[</span><span class="n">roll</span><span class="p">(</span><span class="s2">"1d6"</span><span class="p">)</span> <span class="k">for</span> <span class="n">_</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">poolsize</span><span class="p">)]</span>
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<span class="k">return</span> <span class="n">results</span><span class="o">.</span><span class="n">count</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span> <span class="n">results</span><span class="o">.</span><span class="n">count</span><span class="p">(</span><span class="mi">6</span><span class="p">)</span>
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</pre></div>
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</div>
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</section>
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<section id="get-all-roll-details">
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<h3>Get all roll details<a class="headerlink" href="#get-all-roll-details" title="Permalink to this headline">¶</a></h3>
|
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<p>If you need the individual rolls (e.g. for a dice pool), set the <code class="docutils literal notranslate"><span class="pre">return_tuple</span></code> kwarg:</p>
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<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">roll</span><span class="p">(</span><span class="s2">"3d10 > 10"</span><span class="p">,</span> <span class="n">return_tuple</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
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<span class="p">(</span><span class="mi">13</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">6</span><span class="p">))</span> <span class="c1"># (result, outcome, diff, rolls)</span>
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</pre></div>
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</div>
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<p>The return is a tuple <code class="docutils literal notranslate"><span class="pre">(result,</span> <span class="pre">outcome,</span> <span class="pre">diff,</span> <span class="pre">rolls)</span></code>, where <code class="docutils literal notranslate"><span class="pre">result</span></code> is the
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result of the roll, <code class="docutils literal notranslate"><span class="pre">outcome</span></code> is <code class="docutils literal notranslate"><span class="pre">True/False</span></code> if a conditional was
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given (<code class="docutils literal notranslate"><span class="pre">None</span></code> otherwise), <code class="docutils literal notranslate"><span class="pre">diff</span></code> is the absolute difference between the
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conditional and the result (<code class="docutils literal notranslate"><span class="pre">None</span></code> otherwise) and <code class="docutils literal notranslate"><span class="pre">rolls</span></code> is a tuple containing
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the individual roll results.</p>
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<hr class="docutils" />
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<p><small>This document page is generated from <code class="docutils literal notranslate"><span class="pre">evennia/contrib/rpg/dice/README.md</span></code>. Changes to this
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file will be overwritten, so edit that file rather than this one.</small></p>
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