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<title>GlobeTranslucency - Cesium Documentation</title>
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GlobeTranslucency
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<article>
<div class="container-overview">
<div class="nameContainer">
<h4 class="name" id="GlobeTranslucency">
<a href="#GlobeTranslucency" class="doc-link"></a>
new Cesium.GlobeTranslucency<span class="signature">()</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Scene/GlobeTranslucency.js#L13">Scene/GlobeTranslucency.js 13</a>
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</h4>
</div>
<div class="description">
Properties for controlling globe translucency.
</div>
<dl class="details">
</dl>
</div>
<h3 class="subsection-title">Members</h3>
<div class="nameContainer">
<h4 class="name" id="backFaceAlpha">
<a href="#backFaceAlpha" class="doc-link"></a>
backFaceAlpha<span class="type-signature"> : Number</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Scene/GlobeTranslucency.js#L155">Scene/GlobeTranslucency.js 155</a>
</div>
</h4>
</div>
<div class="description">
A constant translucency to apply to back faces of the globe.
<br /><br />
<a href="GlobeTranslucency.html#enabled"><code>GlobeTranslucency#enabled</code></a> must be set to true for this option to take effect.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript">1.0</code>
<h5>Example:</h5>
<pre><code class="language-javascript">// Set back face translucency to 0.5.
globe.translucency.backFaceAlpha = 0.5;
globe.translucency.enabled = true;</code></pre>
<h5>See:</h5>
<ul class="see-list">
<li><a href="GlobeTranslucency.html#enabled">GlobeTranslucency#enabled</a></li>
<li><a href="GlobeTranslucency.html#backFaceAlphaByDistance">GlobeTranslucency#backFaceAlphaByDistance</a></li>
</ul>
</dl>
<div class="nameContainer">
<h4 class="name" id="backFaceAlphaByDistance">
<a href="#backFaceAlphaByDistance" class="doc-link"></a>
backFaceAlphaByDistance<span class="type-signature"> : <a href="NearFarScalar.html">NearFarScalar</a></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Scene/GlobeTranslucency.js#L198">Scene/GlobeTranslucency.js 198</a>
</div>
</h4>
</div>
<div class="description">
Gets or sets near and far translucency properties of back faces of the globe based on the distance to the camera.
The translucency will interpolate between the <a href="NearFarScalar.html#nearValue"><code>NearFarScalar#nearValue</code></a> and
<a href="NearFarScalar.html#farValue"><code>NearFarScalar#farValue</code></a> while the camera distance falls within the lower and upper bounds
of the specified <a href="NearFarScalar.html#near"><code>NearFarScalar#near</code></a> and <a href="NearFarScalar.html#far"><code>NearFarScalar#far</code></a>.
Outside of these ranges the translucency remains clamped to the nearest bound. If undefined,
backFaceAlphaByDistance will be disabled.
<br /><br />
<a href="GlobeTranslucency.html#enabled"><code>GlobeTranslucency#enabled</code></a> must be set to true for this option to take effect.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript">undefined</code>
<h5>Examples:</h5>
<pre><code class="language-javascript">// Example 1.
// Set back face translucency to 0.5 when the
// camera is 1500 meters from the surface and 1.0
// as the camera distance approaches 8.0e6 meters.
globe.translucency.backFaceAlphaByDistance = new Cesium.NearFarScalar(1.5e2, 0.5, 8.0e6, 1.0);
globe.translucency.enabled = true;</code></pre>
<pre><code class="language-javascript">// Example 2.
// Disable back face translucency by distance
globe.translucency.backFaceAlphaByDistance = undefined;</code></pre>
<h5>See:</h5>
<ul class="see-list">
<li><a href="GlobeTranslucency.html#enabled">GlobeTranslucency#enabled</a></li>
<li><a href="GlobeTranslucency.html#backFaceAlpha">GlobeTranslucency#backFaceAlpha</a></li>
</ul>
</dl>
<div class="nameContainer">
<h4 class="name" id="enabled">
<a href="#enabled" class="doc-link"></a>
enabled<span class="type-signature"> : Boolean</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Scene/GlobeTranslucency.js#L45">Scene/GlobeTranslucency.js 45</a>
</div>
</h4>
</div>
<div class="description">
When true, the globe is rendered as a translucent surface.
<br /><br />
The alpha is computed by blending <a href="Globe.html#material"><code>Globe#material</code></a>, <a href="Globe.html#imageryLayers"><code>Globe#imageryLayers</code></a>,
and <a href="Globe.html#baseColor"><code>Globe#baseColor</code></a>, all of which may contain translucency, and then multiplying by
<a href="GlobeTranslucency.html#frontFaceAlpha"><code>GlobeTranslucency#frontFaceAlpha</code></a> and <a href="GlobeTranslucency.html#frontFaceAlphaByDistance"><code>GlobeTranslucency#frontFaceAlphaByDistance</code></a> for front faces and
<a href="GlobeTranslucency.html#backFaceAlpha"><code>GlobeTranslucency#backFaceAlpha</code></a> and <a href="GlobeTranslucency.html#backFaceAlphaByDistance"><code>GlobeTranslucency#backFaceAlphaByDistance</code></a> for back faces.
When the camera is underground back faces and front faces are swapped, i.e. back-facing geometry
is considered front facing.
<br /><br />
Translucency is disabled by default.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript">false</code>
<h5>See:</h5>
<ul class="see-list">
<li><a href="GlobeTranslucency.html#frontFaceAlpha">GlobeTranslucency#frontFaceAlpha</a></li>
<li><a href="GlobeTranslucency.html#frontFaceAlphaByDistance">GlobeTranslucency#frontFaceAlphaByDistance</a></li>
<li><a href="GlobeTranslucency.html#backFaceAlpha">GlobeTranslucency#backFaceAlpha</a></li>
<li><a href="GlobeTranslucency.html#backFaceAlphaByDistance">GlobeTranslucency#backFaceAlphaByDistance</a></li>
</ul>
</dl>
<div class="nameContainer">
<h4 class="name" id="frontFaceAlpha">
<a href="#frontFaceAlpha" class="doc-link"></a>
frontFaceAlpha<span class="type-signature"> : Number</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Scene/GlobeTranslucency.js#L75">Scene/GlobeTranslucency.js 75</a>
</div>
</h4>
</div>
<div class="description">
A constant translucency to apply to front faces of the globe.
<br /><br />
<a href="GlobeTranslucency.html#enabled"><code>GlobeTranslucency#enabled</code></a> must be set to true for this option to take effect.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript">1.0</code>
<h5>Example:</h5>
<pre><code class="language-javascript">// Set front face translucency to 0.5.
globe.translucency.frontFaceAlpha = 0.5;
globe.translucency.enabled = true;</code></pre>
<h5>See:</h5>
<ul class="see-list">
<li><a href="GlobeTranslucency.html#enabled">GlobeTranslucency#enabled</a></li>
<li><a href="GlobeTranslucency.html#frontFaceAlphaByDistance">GlobeTranslucency#frontFaceAlphaByDistance</a></li>
</ul>
</dl>
<div class="nameContainer">
<h4 class="name" id="frontFaceAlphaByDistance">
<a href="#frontFaceAlphaByDistance" class="doc-link"></a>
frontFaceAlphaByDistance<span class="type-signature"> : <a href="NearFarScalar.html">NearFarScalar</a></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Scene/GlobeTranslucency.js#L118">Scene/GlobeTranslucency.js 118</a>
</div>
</h4>
</div>
<div class="description">
Gets or sets near and far translucency properties of front faces of the globe based on the distance to the camera.
The translucency will interpolate between the <a href="NearFarScalar.html#nearValue"><code>NearFarScalar#nearValue</code></a> and
<a href="NearFarScalar.html#farValue"><code>NearFarScalar#farValue</code></a> while the camera distance falls within the lower and upper bounds
of the specified <a href="NearFarScalar.html#near"><code>NearFarScalar#near</code></a> and <a href="NearFarScalar.html#far"><code>NearFarScalar#far</code></a>.
Outside of these ranges the translucency remains clamped to the nearest bound. If undefined,
frontFaceAlphaByDistance will be disabled.
<br /><br />
<a href="GlobeTranslucency.html#enabled"><code>GlobeTranslucency#enabled</code></a> must be set to true for this option to take effect.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript">undefined</code>
<h5>Examples:</h5>
<pre><code class="language-javascript">// Example 1.
// Set front face translucency to 0.5 when the
// camera is 1500 meters from the surface and 1.0
// as the camera distance approaches 8.0e6 meters.
globe.translucency.frontFaceAlphaByDistance = new Cesium.NearFarScalar(1.5e2, 0.5, 8.0e6, 1.0);
globe.translucency.enabled = true;</code></pre>
<pre><code class="language-javascript">// Example 2.
// Disable front face translucency by distance
globe.translucency.frontFaceAlphaByDistance = undefined;</code></pre>
<h5>See:</h5>
<ul class="see-list">
<li><a href="GlobeTranslucency.html#enabled">GlobeTranslucency#enabled</a></li>
<li><a href="GlobeTranslucency.html#frontFaceAlpha">GlobeTranslucency#frontFaceAlpha</a></li>
</ul>
</dl>
<div class="nameContainer">
<h4 class="name" id="rectangle">
<a href="#rectangle" class="doc-link"></a>
rectangle<span class="type-signature"> : <a href="Rectangle.html">Rectangle</a></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Scene/GlobeTranslucency.js#L226">Scene/GlobeTranslucency.js 226</a>
</div>
</h4>
</div>
<div class="description">
A property specifying a <a href="Rectangle.html"><code>Rectangle</code></a> used to limit translucency to a cartographic area.
Defaults to the maximum extent of cartographic coordinates.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript"><a href="Rectangle.html#.MAX_VALUE"><code>Rectangle.MAX_VALUE</code></a></code>
</dl>
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