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  <div class="section" id="directionallight-a-directional-light">
<h1>DirectionalLight - A directional light<a class="headerlink" href="#directionallight-a-directional-light" title="Permalink to this headline">¶</a></h1>
<p class="rubric">Constructor</p>
<dl class="class">
<dt id="DirectionalLight">
<em class="property">class </em><tt class="descname">DirectionalLight</tt><big>(</big><em>hex</em>, <em>intensity</em>, <em>distance</em><big>)</big><a class="headerlink" href="#DirectionalLight" title="Permalink to this definition">¶</a></dt>
<dd><p>A directional light</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>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>

<p class="rubric">Attributes</p>
<dl class="attribute">
<dt id="DirectionalLight.color">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">color</tt><a class="headerlink" href="#DirectionalLight.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="DirectionalLight.intensity">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">intensity</tt><a class="headerlink" href="#DirectionalLight.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="DirectionalLight.position">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">position</tt><a class="headerlink" href="#DirectionalLight.position" title="Permalink to this definition">¶</a></dt>
<dd><p>Direction of the light is normalized vector from <tt class="docutils literal"><span class="pre">position</span></tt> to <tt class="docutils literal"><span class="pre">(0,0,0)</span></tt>.</p>
</dd></dl>

<dl class="attribute">
<dt id="DirectionalLight.distance">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">distance</tt><a class="headerlink" href="#DirectionalLight.distance" title="Permalink to this definition">¶</a></dt>
<dd><p>Modulating directional light by distance not implemented in <tt class="xref js js-class docutils literal"><span class="pre">WebGLRenderer()</span></tt></p>
</dd></dl>

<p class="rubric">Shadow attributes</p>
<dl class="attribute">
<dt id="DirectionalLight.castShadow">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">castShadow</tt><a class="headerlink" href="#DirectionalLight.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="DirectionalLight.onlyShadow">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">onlyShadow</tt><a class="headerlink" href="#DirectionalLight.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="DirectionalLight.target">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">target</tt><a class="headerlink" href="#DirectionalLight.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="DirectionalLight.shadowCameraNear">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowCameraNear</tt><a class="headerlink" href="#DirectionalLight.shadowCameraNear" title="Permalink to this definition">¶</a></dt>
<dd><p>Orthographic shadow camera frustum parameter</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="DirectionalLight.shadowCameraFar">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowCameraFar</tt><a class="headerlink" href="#DirectionalLight.shadowCameraFar" title="Permalink to this definition">¶</a></dt>
<dd><p>Orthographic shadow camera frustum parameter</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="DirectionalLight.shadowCameraLeft">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowCameraLeft</tt><a class="headerlink" href="#DirectionalLight.shadowCameraLeft" title="Permalink to this definition">¶</a></dt>
<dd><p>Orthographic shadow camera frustum parameter</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">-500</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="DirectionalLight.shadowCameraRight">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowCameraRight</tt><a class="headerlink" href="#DirectionalLight.shadowCameraRight" title="Permalink to this definition">¶</a></dt>
<dd><p>Orthographic shadow camera frustum parameter</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">500</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="DirectionalLight.shadowCameraTop">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowCameraTop</tt><a class="headerlink" href="#DirectionalLight.shadowCameraTop" title="Permalink to this definition">¶</a></dt>
<dd><p>Orthographic shadow camera frustum parameter</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">500</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="DirectionalLight.shadowCameraBottom">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowCameraBottom</tt><a class="headerlink" href="#DirectionalLight.shadowCameraBottom" title="Permalink to this definition">¶</a></dt>
<dd><p>Orthographic shadow camera frustum parameter</p>
<p><tt class="docutils literal"><span class="pre">default</span> <span class="pre">-500</span></tt></p>
</dd></dl>

<dl class="attribute">
<dt id="DirectionalLight.shadowCameraVisible">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowCameraVisible</tt><a class="headerlink" href="#DirectionalLight.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="DirectionalLight.shadowBias">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowBias</tt><a class="headerlink" href="#DirectionalLight.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="DirectionalLight.shadowDarkness">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowDarkness</tt><a class="headerlink" href="#DirectionalLight.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="DirectionalLight.shadowMapWidth">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowMapWidth</tt><a class="headerlink" href="#DirectionalLight.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="DirectionalLight.shadowMapHeight">
<tt class="descclassname">DirectionalLight.</tt><tt class="descname">shadowMapHeight</tt><a class="headerlink" href="#DirectionalLight.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 directional light at half intensity shining from the top</span>

<span class="kd">var</span> <span class="nx">directionalLight</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">THREE</span><span class="p">.</span><span class="nx">DirectionalLight</span><span class="p">(</span> <span class="mh">0xffffff</span><span class="p">,</span> <span class="mf">0.5</span> <span class="p">);</span>
<span class="nx">directionalLight</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">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</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">directionalLight</span> <span class="p">);</span>
</pre></div>
</div>
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