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  <div class="section" id="spotlight-a-spotlight">
<h1>SpotLight - A spotlight<a class="headerlink" href="#spotlight-a-spotlight" title="Permalink to this headline">¶</a></h1>
<p class="rubric">Constructor</p>
<dl class="class">
<dt id="SpotLight">
<em class="property">class </em><tt class="descname">SpotLight</tt><big>(</big><em>hex</em>, <em>intensity</em>, <em>distance</em>, <em>castShadow</em><big>)</big><a class="headerlink" href="#SpotLight" title="Permalink to this definition">¶</a></dt>
<dd><p>A point light that can cast shadow in one direction</p>
<p>Part of scene graph</p>
<p>Inherits from <a class="reference internal" href="Light.html#Light" title="Light"><tt class="xref js js-class docutils literal"><span class="pre">Light()</span></tt></a> <a class="reference internal" href="../core/Object3D.html#Object3D" title="Object3D"><tt class="xref js js-class docutils literal"><span class="pre">Object3D()</span></tt></a></p>
<p>Affects <tt class="xref js js-class docutils literal"><span class="pre">MeshLambertMaterial()</span></tt> and <tt class="xref js js-class docutils literal"><span class="pre">MeshPhongMaterial()</span></tt></p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Arguments:</th><td class="field-body"><ul class="first last simple">
<li><strong>hex</strong> (<em>integer</em>) &#8211; light color</li>
<li><strong>intensity</strong> (<em>float</em>) &#8211; light intensity</li>
<li><strong>distance</strong> (<em>float</em>) &#8211; distance affected by light</li>
<li><strong>castShadow</strong> (<em>bool</em>) &#8211; shadow casting</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>

<p class="rubric">Attributes</p>
<dl class="attribute">
<dt id="SpotLight.color">
<tt class="descclassname">SpotLight.</tt><tt class="descname">color</tt><a class="headerlink" href="#SpotLight.color" title="Permalink to this definition">¶</a></dt>
<dd><p>Light <a class="reference internal" href="../core/Color.html#Color" title="Color"><tt class="xref js js-class docutils literal"><span class="pre">Color()</span></tt></a></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.intensity">
<tt class="descclassname">SpotLight.</tt><tt class="descname">intensity</tt><a class="headerlink" href="#SpotLight.intensity" title="Permalink to this definition">¶</a></dt>
<dd><p>Light intensity</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">1.0</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.position">
<tt class="descclassname">SpotLight.</tt><tt class="descname">position</tt><a class="headerlink" href="#SpotLight.position" title="Permalink to this definition">¶</a></dt>
<dd><p>Position of the light</p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.distance">
<tt class="descclassname">SpotLight.</tt><tt class="descname">distance</tt><a class="headerlink" href="#SpotLight.distance" title="Permalink to this definition">¶</a></dt>
<dd><p>If non-zero, light will attenuate linearly from maximum intensity at light <tt class="docutils literal"><span class="pre">position</span></tt> down to zero at <tt class="docutils literal"><span class="pre">distance</span></tt></p>
</dd></dl>

<p class="rubric">Shadow attributes</p>
<dl class="attribute">
<dt id="SpotLight.castShadow">
<tt class="descclassname">SpotLight.</tt><tt class="descname">castShadow</tt><a class="headerlink" href="#SpotLight.castShadow" title="Permalink to this definition">¶</a></dt>
<dd><p>If set to <cite>true</cite> light will cast dynamic shadows</p>
<p>Warning: this is expensive and requires tweaking to get shadows looking right.</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">false</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.onlyShadow">
<tt class="descclassname">SpotLight.</tt><tt class="descname">onlyShadow</tt><a class="headerlink" href="#SpotLight.onlyShadow" title="Permalink to this definition">¶</a></dt>
<dd><p>If set to <cite>true</cite> light will only cast shadow but not contribute any lighting (as if intensity was 0 but cheaper to compute)</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">false</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.target">
<tt class="descclassname">SpotLight.</tt><tt class="descname">target</tt><a class="headerlink" href="#SpotLight.target" title="Permalink to this definition">¶</a></dt>
<dd><p><a class="reference internal" href="../core/Object3D.html#Object3D" title="Object3D"><tt class="xref js js-class docutils literal"><span class="pre">Object3D()</span></tt></a> target used for shadow camera orientation</p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.shadowCameraNear">
<tt class="descclassname">SpotLight.</tt><tt class="descname">shadowCameraNear</tt><a class="headerlink" href="#SpotLight.shadowCameraNear" title="Permalink to this definition">¶</a></dt>
<dd><p>Perspective shadow camera frustum <tt class="docutils literal"><span class="pre">near</span></tt></p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">50</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.shadowCameraFar">
<tt class="descclassname">SpotLight.</tt><tt class="descname">shadowCameraFar</tt><a class="headerlink" href="#SpotLight.shadowCameraFar" title="Permalink to this definition">¶</a></dt>
<dd><p>Perspective shadow camera frustum <tt class="docutils literal"><span class="pre">far</span></tt></p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">5000</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.shadowCameraFov">
<tt class="descclassname">SpotLight.</tt><tt class="descname">shadowCameraFov</tt><a class="headerlink" href="#SpotLight.shadowCameraFov" title="Permalink to this definition">¶</a></dt>
<dd><p>Perspective shadow camera frustum <tt class="docutils literal"><span class="pre">field-of-view</span></tt></p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">50</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.shadowCameraVisible">
<tt class="descclassname">SpotLight.</tt><tt class="descname">shadowCameraVisible</tt><a class="headerlink" href="#SpotLight.shadowCameraVisible" title="Permalink to this definition">¶</a></dt>
<dd><p>Show debug shadow camera frustum</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">false</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.shadowBias">
<tt class="descclassname">SpotLight.</tt><tt class="descname">shadowBias</tt><a class="headerlink" href="#SpotLight.shadowBias" title="Permalink to this definition">¶</a></dt>
<dd><p>Shadow map bias</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">0</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.shadowDarkness">
<tt class="descclassname">SpotLight.</tt><tt class="descname">shadowDarkness</tt><a class="headerlink" href="#SpotLight.shadowDarkness" title="Permalink to this definition">¶</a></dt>
<dd><p>Darkness of shadow casted by this light (<tt class="docutils literal"><span class="pre">float</span></tt> from 0 to 1)</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">0.5</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.shadowMapWidth">
<tt class="descclassname">SpotLight.</tt><tt class="descname">shadowMapWidth</tt><a class="headerlink" href="#SpotLight.shadowMapWidth" title="Permalink to this definition">¶</a></dt>
<dd><p>Shadow map texture width in pixels</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">512</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="SpotLight.shadowMapHeight">
<tt class="descclassname">SpotLight.</tt><tt class="descname">shadowMapHeight</tt><a class="headerlink" href="#SpotLight.shadowMapHeight" title="Permalink to this definition">¶</a></dt>
<dd><p>Shadow map texture height in pixels</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">512</span></tt></p>
</dd></dl>

<p class="rubric">Example</p>
<div class="highlight-javascript"><div class="highlight"><pre><span class="c1">// white spotlight shining from the side, casting shadow</span>

<span class="kd">var</span> <span class="nx">spotLight</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">THREE</span><span class="p">.</span><span class="nx">SpotLight</span><span class="p">(</span> <span class="mh">0xffffff</span> <span class="p">);</span>
<span class="nx">spotLight</span><span class="p">.</span><span class="nx">position</span><span class="p">.</span><span class="nx">set</span><span class="p">(</span> <span class="mi">100</span><span class="p">,</span> <span class="mi">1000</span><span class="p">,</span> <span class="mi">100</span> <span class="p">);</span>

<span class="nx">spotLight</span><span class="p">.</span><span class="nx">castShadow</span> <span class="o">=</span> <span class="kc">true</span><span class="p">;</span>

<span class="nx">spotLight</span><span class="p">.</span><span class="nx">shadowMapWidth</span> <span class="o">=</span> <span class="mi">1024</span><span class="p">;</span>
<span class="nx">spotLight</span><span class="p">.</span><span class="nx">shadowMapHeight</span> <span class="o">=</span> <span class="mi">1024</span><span class="p">;</span>

<span class="nx">spotLight</span><span class="p">.</span><span class="nx">shadowCameraNear</span> <span class="o">=</span> <span class="mi">500</span><span class="p">;</span>
<span class="nx">spotLight</span><span class="p">.</span><span class="nx">shadowCameraFar</span> <span class="o">=</span> <span class="mi">4000</span><span class="p">;</span>
<span class="nx">spotLight</span><span class="p">.</span><span class="nx">shadowCameraFov</span> <span class="o">=</span> <span class="mi">30</span><span class="p">;</span>

<span class="nx">scene</span><span class="p">.</span><span class="nx">add</span><span class="p">(</span> <span class="nx">spotLight</span> <span class="p">);</span>
</pre></div>
</div>
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