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EllipseGeometry
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<h4 class="name" id="EllipseGeometry">
<a href="#EllipseGeometry" class="doc-link"></a>
new Cesium.EllipseGeometry<span class="signature">(options)</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/EllipseGeometry.js#L921">Core/EllipseGeometry.js 921</a>
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</h4>
</div>
<div class="description">
A description of an ellipse on an ellipsoid. Ellipse geometry can be rendered with both <a href="Primitive.html"><code>Primitive</code></a> and <a href="GroundPrimitive.html"><code>GroundPrimitive</code></a>.
</div>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>options</code></td>
<td class="type">
<span class="param-type">Object</span>
</td>
<td class="description last">
Object with the following properties:
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Default</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>center</code></td>
<td class="type">
<span class="param-type"><a href="Cartesian3.html">Cartesian3</a></span>
</td>
<td class="default">
</td>
<td class="description last">
The ellipse's center point in the fixed frame.</td>
</tr>
<tr>
<td class="name"><code>semiMajorAxis</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
</td>
<td class="description last">
The length of the ellipse's semi-major axis in meters.</td>
</tr>
<tr>
<td class="name"><code>semiMinorAxis</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
</td>
<td class="description last">
The length of the ellipse's semi-minor axis in meters.</td>
</tr>
<tr>
<td class="name"><code>ellipsoid</code></td>
<td class="type">
<span class="param-type"><a href="Ellipsoid.html">Ellipsoid</a></span>
</td>
<td class="default">
<code class="language-javascript">Ellipsoid.WGS84</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The ellipsoid the ellipse will be on.</td>
</tr>
<tr>
<td class="name"><code>height</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
<code class="language-javascript">0.0</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The distance in meters between the ellipse and the ellipsoid surface.</td>
</tr>
<tr>
<td class="name"><code>extrudedHeight</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
</td>
<td class="description last">
<span class="optional">optional</span>
The distance in meters between the ellipse's extruded face and the ellipsoid surface.</td>
</tr>
<tr>
<td class="name"><code>rotation</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
<code class="language-javascript">0.0</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The angle of rotation counter-clockwise from north.</td>
</tr>
<tr>
<td class="name"><code>stRotation</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
<code class="language-javascript">0.0</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The rotation of the texture coordinates counter-clockwise from north.</td>
</tr>
<tr>
<td class="name"><code>granularity</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
<code class="language-javascript">CesiumMath.RADIANS_PER_DEGREE</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The angular distance between points on the ellipse in radians.</td>
</tr>
<tr>
<td class="name"><code>vertexFormat</code></td>
<td class="type">
<span class="param-type"><a href="VertexFormat.html">VertexFormat</a></span>
</td>
<td class="default">
<code class="language-javascript">VertexFormat.DEFAULT</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The vertex attributes to be computed.</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
<h5>Throws:</h5>
<ul>
<li>
<div class="param-desc">
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
: semiMajorAxis and semiMinorAxis must be greater than zero.
</div>
</li>
<li>
<div class="param-desc">
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
: semiMajorAxis must be greater than or equal to the semiMinorAxis.
</div>
</li>
<li>
<div class="param-desc">
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>
: granularity must be greater than zero.
</div>
</li>
</ul>
<dl class="details">
<h5>Example:</h5>
<pre><code class="language-javascript">// Create an ellipse.
const ellipse = new Cesium.EllipseGeometry({
center : Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
semiMajorAxis : 500000.0,
semiMinorAxis : 300000.0,
rotation : Cesium.Math.toRadians(60.0)
});
const geometry = Cesium.EllipseGeometry.createGeometry(ellipse);</code></pre>
<h5>See:</h5>
<ul class="see-list">
<li><a href="EllipseGeometry.html#.createGeometry">EllipseGeometry.createGeometry</a></li>
</ul>
</dl>
</div>
<h3 class="subsection-title">Members</h3>
<div class="nameContainer">
<h4 class="name" id=".packedLength">
<a href="#.packedLength" class="doc-link"></a>
<span class="type-signature attribute-static">static</span> Cesium.EllipseGeometry.packedLength<span class="type-signature"> : Number</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/EllipseGeometry.js#L973">Core/EllipseGeometry.js 973</a>
</div>
</h4>
</div>
<div class="description">
The number of elements used to pack the object into an array.
</div>
<dl class="details">
</dl>
<h3 class="subsection-title">Methods</h3>
<div class="nameContainer">
<h4 class="name" id=".computeRectangle">
<a href="#.computeRectangle" class="doc-link"></a>
<span class="type-signature attribute-static">static</span> Cesium.EllipseGeometry.computeRectangle<span class="signature">(options, <span class="optional">result</span>)</span> &rarr; <span class="type-signature returnType"><a href="Rectangle.html">Rectangle</a></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/EllipseGeometry.js#L1120">Core/EllipseGeometry.js 1120</a>
</div>
</h4>
</div>
<div class="description">
Computes the bounding rectangle based on the provided options
</div>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>options</code></td>
<td class="type">
<span class="param-type">Object</span>
</td>
<td class="description last">
Object with the following properties:
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Default</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>center</code></td>
<td class="type">
<span class="param-type"><a href="Cartesian3.html">Cartesian3</a></span>
</td>
<td class="default">
</td>
<td class="description last">
The ellipse's center point in the fixed frame.</td>
</tr>
<tr>
<td class="name"><code>semiMajorAxis</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
</td>
<td class="description last">
The length of the ellipse's semi-major axis in meters.</td>
</tr>
<tr>
<td class="name"><code>semiMinorAxis</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
</td>
<td class="description last">
The length of the ellipse's semi-minor axis in meters.</td>
</tr>
<tr>
<td class="name"><code>ellipsoid</code></td>
<td class="type">
<span class="param-type"><a href="Ellipsoid.html">Ellipsoid</a></span>
</td>
<td class="default">
<code class="language-javascript">Ellipsoid.WGS84</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The ellipsoid the ellipse will be on.</td>
</tr>
<tr>
<td class="name"><code>rotation</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
<code class="language-javascript">0.0</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The angle of rotation counter-clockwise from north.</td>
</tr>
<tr>
<td class="name"><code>granularity</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
<code class="language-javascript">CesiumMath.RADIANS_PER_DEGREE</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The angular distance between points on the ellipse in radians.</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td class="name"><code>result</code></td>
<td class="type">
<span class="param-type"><a href="Rectangle.html">Rectangle</a></span>
</td>
<td class="description last">
<span class="optional">optional</span>
An object in which to store the result</td>
</tr>
</tbody>
</table>
<h5>Returns:</h5>
<div class="param-desc">
The result rectangle
</div>
<dl class="details">
</dl>
<div class="nameContainer">
<h4 class="name" id=".createGeometry">
<a href="#.createGeometry" class="doc-link"></a>
<span class="type-signature attribute-static">static</span> Cesium.EllipseGeometry.createGeometry<span class="signature">(ellipseGeometry)</span> &rarr; <span class="type-signature returnType"><a href="Geometry.html">Geometry</a>|undefined</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/EllipseGeometry.js#L1164">Core/EllipseGeometry.js 1164</a>
</div>
</h4>
</div>
<div class="description">
Computes the geometric representation of a ellipse on an ellipsoid, including its vertices, indices, and a bounding sphere.
</div>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>ellipseGeometry</code></td>
<td class="type">
<span class="param-type"><a href="EllipseGeometry.html">EllipseGeometry</a></span>
</td>
<td class="description last">
A description of the ellipse.</td>
</tr>
</tbody>
</table>
<h5>Returns:</h5>
<div class="param-desc">
The computed vertices and indices.
</div>
<dl class="details">
</dl>
<div class="nameContainer">
<h4 class="name" id=".pack">
<a href="#.pack" class="doc-link"></a>
<span class="type-signature attribute-static">static</span> Cesium.EllipseGeometry.pack<span class="signature">(value, array, <span class="optional">startingIndex</span>)</span> &rarr; <span class="type-signature returnType">Array.&lt;Number></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/EllipseGeometry.js#L988">Core/EllipseGeometry.js 988</a>
</div>
</h4>
</div>
<div class="description">
Stores the provided instance into the provided array.
</div>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Default</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>value</code></td>
<td class="type">
<span class="param-type"><a href="EllipseGeometry.html">EllipseGeometry</a></span>
</td>
<td class="default">
</td>
<td class="description last">
The value to pack.</td>
</tr>
<tr>
<td class="name"><code>array</code></td>
<td class="type">
<span class="param-type">Array.&lt;Number></span>
</td>
<td class="default">
</td>
<td class="description last">
The array to pack into.</td>
</tr>
<tr>
<td class="name"><code>startingIndex</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
<code class="language-javascript">0</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The index into the array at which to start packing the elements.</td>
</tr>
</tbody>
</table>
<h5>Returns:</h5>
<div class="param-desc">
The array that was packed into
</div>
<dl class="details">
</dl>
<div class="nameContainer">
<h4 class="name" id=".unpack">
<a href="#.unpack" class="doc-link"></a>
<span class="type-signature attribute-static">static</span> Cesium.EllipseGeometry.unpack<span class="signature">(array, <span class="optional">startingIndex</span>, <span class="optional">result</span>)</span> &rarr; <span class="type-signature returnType"><a href="EllipseGeometry.html">EllipseGeometry</a></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/EllipseGeometry.js#L1044">Core/EllipseGeometry.js 1044</a>
</div>
</h4>
</div>
<div class="description">
Retrieves an instance from a packed array.
</div>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Default</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>array</code></td>
<td class="type">
<span class="param-type">Array.&lt;Number></span>
</td>
<td class="default">
</td>
<td class="description last">
The packed array.</td>
</tr>
<tr>
<td class="name"><code>startingIndex</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="default">
<code class="language-javascript">0</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The starting index of the element to be unpacked.</td>
</tr>
<tr>
<td class="name"><code>result</code></td>
<td class="type">
<span class="param-type"><a href="EllipseGeometry.html">EllipseGeometry</a></span>
</td>
<td class="default">
</td>
<td class="description last">
<span class="optional">optional</span>
The object into which to store the result.</td>
</tr>
</tbody>
</table>
<h5>Returns:</h5>
<div class="param-desc">
The modified result parameter or a new EllipseGeometry instance if one was not provided.
</div>
<dl class="details">
</dl>
</article>
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