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<section id="sca-replacemeshactuator-sca-iactuator">
<h1>SCA_ReplaceMeshActuator(SCA_IActuator)<a class="headerlink" href="#sca-replacemeshactuator-sca-iactuator" title="Link to this heading"></a></h1>
<p>base class — <a class="reference internal" href="bge.types.SCA_IActuator.html#bge.types.SCA_IActuator" title="bge.types.SCA_IActuator"><code class="xref py py-class docutils literal notranslate"><span class="pre">SCA_IActuator</span></code></a></p>
<dl class="py class">
<dt class="sig sig-object py" id="bge.types.SCA_ReplaceMeshActuator">
<em class="property"><span class="pre">class</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">bge.types.</span></span><span class="sig-name descname"><span class="pre">SCA_ReplaceMeshActuator</span></span><a class="headerlink" href="#bge.types.SCA_ReplaceMeshActuator" title="Link to this definition"></a></dt>
<dd><p>Edit Object actuator, in Replace Mesh mode.</p>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>Replace mesh actuators will be ignored if at game start, the named mesh doesn’t exist.</p>
<p>This will generate a warning in the console</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Error: GameObject 'Name' ReplaceMeshActuator 'ActuatorName' without object
</pre></div>
</div>
</div>
<div class="highlight-python notranslate"><div class="highlight"><pre><span></span><span class="c1"># Level-of-detail</span>
<span class="c1"># Switch a game object's mesh based on its depth in the camera view.</span>
<span class="c1"># +----------+ +-----------+ +-------------------------------------+</span>
<span class="c1"># | Always +-----+ Python +-----+ Edit Object (Replace Mesh) LOD.Mesh |</span>
<span class="c1"># +----------+ +-----------+ +-------------------------------------+</span>
<span class="kn">from</span> <span class="nn">bge</span> <span class="kn">import</span> <span class="n">logic</span>
<span class="c1"># List detail meshes here</span>
<span class="c1"># Mesh (name, near, far)</span>
<span class="c1"># Meshes overlap so that they don't 'pop' when on the edge of the distance.</span>
<span class="n">meshes</span> <span class="o">=</span> <span class="p">((</span><span class="s2">".Hi"</span><span class="p">,</span> <span class="mf">0.0</span><span class="p">,</span> <span class="o">-</span><span class="mf">20.0</span><span class="p">),</span>
<span class="p">(</span><span class="s2">".Med"</span><span class="p">,</span> <span class="o">-</span><span class="mf">15.0</span><span class="p">,</span> <span class="o">-</span><span class="mf">50.0</span><span class="p">),</span>
<span class="p">(</span><span class="s2">".Lo"</span><span class="p">,</span> <span class="o">-</span><span class="mf">40.0</span><span class="p">,</span> <span class="o">-</span><span class="mf">100.0</span><span class="p">)</span>
<span class="p">)</span>
<span class="n">cont</span> <span class="o">=</span> <span class="n">logic</span><span class="o">.</span><span class="n">getCurrentController</span><span class="p">()</span>
<span class="nb">object</span> <span class="o">=</span> <span class="n">cont</span><span class="o">.</span><span class="n">owner</span>
<span class="n">actuator</span> <span class="o">=</span> <span class="n">cont</span><span class="o">.</span><span class="n">actuators</span><span class="p">[</span><span class="s2">"LOD."</span> <span class="o">+</span> <span class="n">obj</span><span class="o">.</span><span class="n">name</span><span class="p">]</span>
<span class="n">camera</span> <span class="o">=</span> <span class="n">logic</span><span class="o">.</span><span class="n">getCurrentScene</span><span class="p">()</span><span class="o">.</span><span class="n">active_camera</span>
<span class="k">def</span> <span class="nf">Depth</span><span class="p">(</span><span class="n">pos</span><span class="p">,</span> <span class="n">plane</span><span class="p">):</span>
<span class="k">return</span> <span class="n">pos</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">*</span><span class="n">plane</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="n">pos</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="o">*</span><span class="n">plane</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">+</span> <span class="n">pos</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span><span class="o">*</span><span class="n">plane</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">+</span> <span class="n">plane</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span>
<span class="c1"># Depth is negative and decreasing further from the camera</span>
<span class="n">depth</span> <span class="o">=</span> <span class="n">Depth</span><span class="p">(</span><span class="nb">object</span><span class="o">.</span><span class="n">position</span><span class="p">,</span> <span class="n">camera</span><span class="o">.</span><span class="n">world_to_camera</span><span class="p">[</span><span class="mi">2</span><span class="p">])</span>
<span class="n">newmesh</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">curmesh</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># Find the lowest detail mesh for depth</span>
<span class="k">for</span> <span class="n">mesh</span> <span class="ow">in</span> <span class="n">meshes</span><span class="p">:</span>
<span class="k">if</span> <span class="n">depth</span> <span class="o"><</span> <span class="n">mesh</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="ow">and</span> <span class="n">depth</span> <span class="o">></span> <span class="n">mesh</span><span class="p">[</span><span class="mi">2</span><span class="p">]:</span>
<span class="n">newmesh</span> <span class="o">=</span> <span class="n">mesh</span>
<span class="k">if</span> <span class="s2">"ME"</span> <span class="o">+</span> <span class="nb">object</span><span class="o">.</span><span class="n">name</span> <span class="o">+</span> <span class="n">mesh</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="n">actuator</span><span class="o">.</span><span class="n">getMesh</span><span class="p">():</span>
<span class="n">curmesh</span> <span class="o">=</span> <span class="n">mesh</span>
<span class="k">if</span> <span class="n">newmesh</span> <span class="o">!=</span> <span class="kc">None</span> <span class="ow">and</span> <span class="s2">"ME"</span> <span class="o">+</span> <span class="nb">object</span><span class="o">.</span><span class="n">name</span> <span class="o">+</span> <span class="n">newmesh</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">!=</span> <span class="n">actuator</span><span class="o">.</span><span class="n">mesh</span><span class="p">:</span>
<span class="c1"># The mesh is a different mesh - switch it.</span>
<span class="c1"># Check the current mesh is not a better fit.</span>
<span class="k">if</span> <span class="n">curmesh</span> <span class="o">==</span> <span class="kc">None</span> <span class="ow">or</span> <span class="n">curmesh</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o"><</span> <span class="n">depth</span> <span class="ow">or</span> <span class="n">curmesh</span><span class="p">[</span><span class="mi">2</span><span class="p">]</span> <span class="o">></span> <span class="n">depth</span><span class="p">:</span>
<span class="n">actuator</span><span class="o">.</span><span class="n">mesh</span> <span class="o">=</span> <span class="nb">object</span><span class="o">.</span><span class="n">name</span> <span class="o">+</span> <span class="n">newmesh</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">cont</span><span class="o">.</span><span class="n">activate</span><span class="p">(</span><span class="n">actuator</span><span class="p">)</span>
</pre></div>
</div>
<dl class="py attribute">
<dt class="sig sig-object py" id="bge.types.SCA_ReplaceMeshActuator.mesh">
<span class="sig-name descname"><span class="pre">mesh</span></span><a class="headerlink" href="#bge.types.SCA_ReplaceMeshActuator.mesh" title="Link to this definition"></a></dt>
<dd><p><a class="reference internal" href="bge.types.KX_MeshProxy.html#bge.types.KX_MeshProxy" title="bge.types.KX_MeshProxy"><code class="xref py py-class docutils literal notranslate"><span class="pre">KX_MeshProxy</span></code></a> or the name of the mesh that will replace the current one.</p>
<p>Set to None to disable actuator.</p>
<dl class="field-list simple">
<dt class="field-odd">Type<span class="colon">:</span></dt>
<dd class="field-odd"><p><a class="reference internal" href="bge.types.KX_MeshProxy.html#bge.types.KX_MeshProxy" title="bge.types.KX_MeshProxy"><code class="xref py py-class docutils literal notranslate"><span class="pre">KX_MeshProxy</span></code></a> or None if no mesh is set</p>
</dd>
</dl>
</dd></dl>
<dl class="py attribute">
<dt class="sig sig-object py" id="bge.types.SCA_ReplaceMeshActuator.useDisplayMesh">
<span class="sig-name descname"><span class="pre">useDisplayMesh</span></span><a class="headerlink" href="#bge.types.SCA_ReplaceMeshActuator.useDisplayMesh" title="Link to this definition"></a></dt>
<dd><p>when true the displayed mesh is replaced.</p>
<dl class="field-list simple">
<dt class="field-odd">Type<span class="colon">:</span></dt>
<dd class="field-odd"><p>boolean</p>
</dd>
</dl>
</dd></dl>
<dl class="py attribute">
<dt class="sig sig-object py" id="bge.types.SCA_ReplaceMeshActuator.usePhysicsMesh">
<span class="sig-name descname"><span class="pre">usePhysicsMesh</span></span><a class="headerlink" href="#bge.types.SCA_ReplaceMeshActuator.usePhysicsMesh" title="Link to this definition"></a></dt>
<dd><p>when true the physics mesh is replaced.</p>
<dl class="field-list simple">
<dt class="field-odd">Type<span class="colon">:</span></dt>
<dd class="field-odd"><p>boolean</p>
</dd>
</dl>
</dd></dl>
<dl class="py method">
<dt class="sig sig-object py" id="bge.types.SCA_ReplaceMeshActuator.instantReplaceMesh">
<span class="sig-name descname"><span class="pre">instantReplaceMesh</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#bge.types.SCA_ReplaceMeshActuator.instantReplaceMesh" title="Link to this definition"></a></dt>
<dd><p>Immediately replace mesh without delay.</p>
</dd></dl>
</dd></dl>
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