rparedis
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pyCBD


			
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              <p class="caption"><span class="caption-text">Setup</span></p>
<ul>
<li class="toctree-l1"><a class="reference internal" href="../install.html">How to install the CBD framework?</a></li>
<li class="toctree-l1"><a class="reference internal" href="../running.html">How to run a CBD simulation?</a></li>
<li class="toctree-l1"><a class="reference internal" href="../changelog.html">Changelog</a></li>
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<p class="caption"><span class="caption-text">Simple Examples</span></p>
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<li class="toctree-l1"><a class="reference internal" href="SinGen.html">Sine Generator</a></li>
<li class="toctree-l1"><a class="reference internal" href="EvenNumberGen.html">Hierarchical Even Number Generator</a></li>
<li class="toctree-l1"><a class="reference internal" href="Fibonacci.html">Fibonacci Sequence Generator</a></li>
<li class="toctree-l1"><a class="reference internal" href="LCG.html">Linear Congruential Generator</a></li>
</ul>
<p class="caption"><span class="caption-text">Advanced Examples</span></p>
<ul class="current">
<li class="toctree-l1 current"><a class="current reference internal" href="#">Realtime Simulation</a></li>
<li class="toctree-l1"><a class="reference internal" href="LivePlot.html">Live Plotting of Data During the Simulation</a></li>
</ul>
<p class="caption"><span class="caption-text">Internal Documentation</span></p>
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<li class="toctree-l1"><a class="reference internal" href="../CBD.html">CBD package</a></li>
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  <div class="section" id="realtime-simulation">
<h1>Realtime Simulation<a class="headerlink" href="#realtime-simulation" title="Permalink to this headline">¶</a></h1>
<p>Besides normal (as-fast-as-possible) simulation, it is also possible to simulate CBD models in realtime. Here, the
time (and therefore <cite>delta t</cite> as well) will be interpreted as seconds and the simulator will wait <strong>non-blocking</strong>
until the required time has passed. There are several supported backend that provide this functionality. These
backends are based on the backends provided by <a class="reference external" href="https://msdl.uantwerpen.be/documentation/PythonPDEVS/realtime.html">PyPDEVS</a>.</p>
<p>While there doesn’t have to be feedback duing a simulation, the <a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.setProgressBar" title="CBD.simulator.Simulator.setProgressBar"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.setProgressBar()</span></code></a>
function provides a <a class="reference external" href="https://tqdm.github.io/">tqdm progress bar</a>. When running long simulations, this might
be a useful feature. Note that, when combined with a termination condition, the progress bar may yield inaccurate
values.</p>
<div class="admonition seealso">
<p class="first admonition-title">See also</p>
<ul class="last simple">
<li>When using progress bars, <a class="reference external" href="https://tqdm.github.io/">tqdm</a> must be installed.</li>
<li>In <a class="reference internal" href="LivePlot.html"><span class="doc">Live Plotting of Data During the Simulation</span></a>, realtime simulation is used together with a variation of the <a class="reference internal" href="SinGen.html"><span class="doc">Sine Generator</span></a> example.</li>
</ul>
</div>
<div class="admonition attention">
<p class="first admonition-title">Attention</p>
<p class="last">In the future, there will be possibilities for interrupt events, similar to <a class="reference external" href="https://msdl.uantwerpen.be/documentation/PythonPDEVS/realtime.html">PyPDEVS</a>.</p>
</div>
<div class="section" id="example-model">
<h2>Example Model<a class="headerlink" href="#example-model" title="Permalink to this headline">¶</a></h2>
<p>To simplify the explanations of the following sections, we will be using the <a class="reference internal" href="SinGen.html"><span class="doc">Sine Generator</span></a> as a basis model.
To recap:</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">CBD.CBD</span> <span class="kn">import</span> <span class="n">CBD</span>
<span class="kn">from</span> <span class="nn">CBD.simulator</span> <span class="kn">import</span> <span class="n">Simulator</span>
<span class="kn">from</span> <span class="nn">CBD.lib.std</span> <span class="kn">import</span> <span class="n">TimeBlock</span><span class="p">,</span> <span class="n">GenericBlock</span>
<span class="kn">from</span> <span class="nn">CBD.lib.endpoints</span> <span class="kn">import</span> <span class="n">SignalCollectorBlock</span>

<span class="k">class</span> <span class="nc">SinGen</span><span class="p">(</span><span class="n">CBD</span><span class="p">):</span>
    <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="s2">&quot;SinGen&quot;</span><span class="p">):</span>
        <span class="n">CBD</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">,</span> <span class="n">input_ports</span><span class="o">=</span><span class="p">[],</span> <span class="n">output_ports</span><span class="o">=</span><span class="p">[])</span>

        <span class="c1"># Create the blocks</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">addBlock</span><span class="p">(</span><span class="n">TimeBlock</span><span class="p">(</span><span class="s2">&quot;time&quot;</span><span class="p">))</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">addBlock</span><span class="p">(</span><span class="n">GenericBlock</span><span class="p">(</span><span class="s2">&quot;sin&quot;</span><span class="p">,</span> <span class="n">block_operator</span><span class="o">=</span><span class="s2">&quot;sin&quot;</span><span class="p">))</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">addBlock</span><span class="p">(</span><span class="n">SignalCollectorBlock</span><span class="p">(</span><span class="s2">&quot;collector&quot;</span><span class="p">))</span>

        <span class="c1"># Connect the blocks</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">addConnection</span><span class="p">(</span><span class="s2">&quot;time&quot;</span><span class="p">,</span> <span class="s2">&quot;sin&quot;</span><span class="p">)</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">addConnection</span><span class="p">(</span><span class="s2">&quot;sin&quot;</span><span class="p">,</span> <span class="s2">&quot;collector&quot;</span><span class="p">)</span>

<span class="n">sinGen</span> <span class="o">=</span> <span class="n">SinGen</span><span class="p">(</span><span class="s2">&quot;SinGen&quot;</span><span class="p">)</span>
<span class="n">sim</span> <span class="o">=</span> <span class="n">Simulator</span><span class="p">(</span><span class="n">sinGen</span><span class="p">)</span>
<span class="n">sim</span><span class="o">.</span><span class="n">setRealTime</span><span class="p">()</span>
</pre></div>
</div>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p>Realtime simulation happens non-blocking. This means the <a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.run" title="CBD.simulator.Simulator.run"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.run()</span></code></a> method will be called
asynchronously. Additionally, simulation runs as a daemon thread, so exiting the main thread will automatically
terminate the simulation. To keep the script alive until after the simulation, you can use:</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="k">while</span> <span class="n">sim</span><span class="o">.</span><span class="n">is_running</span><span class="p">():</span>
    <span class="k">pass</span>
</pre></div>
</div>
<div class="last line-block">
<div class="line"><br /></div>
</div>
</div>
</div>
<div class="section" id="python-threading-backend">
<h2>Python Threading Backend<a class="headerlink" href="#python-threading-backend" title="Permalink to this headline">¶</a></h2>
<p>The threading (or Python) backend/platform will use the <code class="xref py py-mod docutils literal notranslate"><span class="pre">threading</span></code> module for delaying the simulation steps.
This is the default simulation backend.</p>
<div class="admonition warning">
<p class="first admonition-title">Warning</p>
<p class="last">Python threads can sometimes have a rather low granularity in CPython 2. So while we are simulating in soft
realtime anyway, it is important to note that delays could potentially become significant.</p>
</div>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">sim</span><span class="o">.</span><span class="n">setRealTimePlatformThreading</span><span class="p">()</span>
<span class="n">sim</span><span class="o">.</span><span class="n">setDeltaT</span><span class="p">(</span><span class="mf">0.3</span><span class="p">)</span>
<span class="n">sim</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="mf">100.0</span><span class="p">)</span>

<span class="c1"># Keep it alive</span>
<span class="k">while</span> <span class="n">sim</span><span class="o">.</span><span class="n">is_running</span><span class="p">():</span> <span class="k">pass</span>

<span class="nb">print</span><span class="p">(</span><span class="s2">&quot;FINISHED!&quot;</span><span class="p">)</span>
</pre></div>
</div>
<div class="admonition seealso">
<p class="first admonition-title">See also</p>
<ul class="last simple">
<li><a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.setRealTimePlatform" title="CBD.simulator.Simulator.setRealTimePlatform"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.setRealTimePlatform()</span></code></a></li>
<li><a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.setRealTimePlatformThreading" title="CBD.simulator.Simulator.setRealTimePlatformThreading"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.setRealTimePlatformThreading()</span></code></a></li>
<li><a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.is_running" title="CBD.simulator.Simulator.is_running"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.is_running()</span></code></a></li>
</ul>
</div>
</div>
<div class="section" id="tkinter-backend">
<h2>TkInter Backend<a class="headerlink" href="#tkinter-backend" title="Permalink to this headline">¶</a></h2>
<p>The <a class="reference external" href="https://docs.python.org/3/library/tkinter.html">TkInter</a> event loop can become quite complex, as it is
required to interface to the GUI as wel as to the simulation. Luckily, this backend will wrap all the complexity
into a white box. It is, however, required to define the GUI application and start the mainloop, but afterwards,
all will be handled for you.</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">tkinter</span> <span class="k">as</span> <span class="nn">tk</span>

<span class="n">root</span> <span class="o">=</span> <span class="n">tk</span><span class="o">.</span><span class="n">Tk</span><span class="p">()</span>
<span class="n">sim</span><span class="o">.</span><span class="n">setRealTimePlatformTk</span><span class="p">(</span><span class="n">root</span><span class="p">)</span>
<span class="n">sim</span><span class="o">.</span><span class="n">setDeltaT</span><span class="p">(</span><span class="mf">0.3</span><span class="p">)</span>
<span class="n">sim</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="mf">100.0</span><span class="p">)</span>
<span class="n">root</span><span class="o">.</span><span class="n">mainloop</span><span class="p">()</span>

<span class="nb">print</span><span class="p">(</span><span class="s2">&quot;FINISHED!&quot;</span><span class="p">)</span>
</pre></div>
</div>
<div class="admonition seealso">
<p class="first admonition-title">See also</p>
<ul class="last simple">
<li><a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.setRealTimePlatform" title="CBD.simulator.Simulator.setRealTimePlatform"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.setRealTimePlatform()</span></code></a></li>
<li><a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.setRealTimePlatformTk" title="CBD.simulator.Simulator.setRealTimePlatformTk"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.setRealTimePlatformTk()</span></code></a></li>
</ul>
</div>
</div>
<div class="section" id="gameloop-backend">
<h2>GameLoop Backend<a class="headerlink" href="#gameloop-backend" title="Permalink to this headline">¶</a></h2>
<p>Whenever it is required to control the invocation of delays from another execution loop, like e.g. a gameloop,
it is pertinent to make use of the <cite>GameLoop</cite> backend. Delays won’t happen internally anymore, as they should be
handled by the execution loop. By making use of the <a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.realtime_gameloop_call" title="CBD.simulator.Simulator.realtime_gameloop_call"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.realtime_gameloop_call()</span></code></a>, the
simulation can advance to the next timestep.</p>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="n">sim</span><span class="o">.</span><span class="n">setRealTimePlatformGameLoop</span><span class="p">()</span>
<span class="n">sim</span><span class="o">.</span><span class="n">setDeltaT</span><span class="p">(</span><span class="mf">0.3</span><span class="p">)</span>
<span class="n">sim</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="mf">100.0</span><span class="p">)</span>

<span class="k">while</span> <span class="n">sim</span><span class="o">.</span><span class="n">is_running</span><span class="p">():</span>
    <span class="c1"># do some fancy computations</span>
    <span class="o">...</span>

    <span class="c1"># do some rendering</span>
    <span class="o">...</span>

    <span class="c1"># advance the model&#39;s state</span>
    <span class="n">sim</span><span class="o">.</span><span class="n">realtime_gameloop_call</span><span class="p">()</span>

<span class="nb">print</span><span class="p">(</span><span class="s2">&quot;FINISHED!&quot;</span><span class="p">)</span>
</pre></div>
</div>
<div class="admonition seealso">
<p class="first admonition-title">See also</p>
<ul class="last simple">
<li><a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.setRealTimePlatform" title="CBD.simulator.Simulator.setRealTimePlatform"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.setRealTimePlatform()</span></code></a></li>
<li><a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.setRealTimePlatformGameLoop" title="CBD.simulator.Simulator.setRealTimePlatformGameLoop"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.setRealTimePlatformGameLoop()</span></code></a></li>
<li><a class="reference internal" href="../CBD.simulator.html#CBD.simulator.Simulator.realtime_gameloop_call" title="CBD.simulator.Simulator.realtime_gameloop_call"><code class="xref py py-func docutils literal notranslate"><span class="pre">CBD.simulator.Simulator.realtime_gameloop_call()</span></code></a></li>
</ul>
</div>
</div>
</div>


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