qd-changjing/public/static/Build/Documentation/Ray.html

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Ray
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<h4 class="name" id="Ray">
<a href="#Ray" class="doc-link"></a>
new Cesium.Ray<span class="signature">(<span class="optional">origin</span>, <span class="optional">direction</span>)</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/Ray.js#L14">Core/Ray.js 14</a>
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<div class="description">
Represents a ray that extends infinitely from the provided origin in the provided direction.
</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>origin</code></td>
<td class="type">
<span class="param-type"><a href="Cartesian3.html">Cartesian3</a></span>
</td>
<td class="default">
<code class="language-javascript">Cartesian3.ZERO</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The origin of the ray.</td>
</tr>
<tr>
<td class="name"><code>direction</code></td>
<td class="type">
<span class="param-type"><a href="Cartesian3.html">Cartesian3</a></span>
</td>
<td class="default">
<code class="language-javascript">Cartesian3.ZERO</code>
</td>
<td class="description last">
<span class="optional">optional</span>
The direction of the ray.</td>
</tr>
</tbody>
</table>
<dl class="details">
</dl>
</div>
<h3 class="subsection-title">Members</h3>
<div class="nameContainer">
<h4 class="name" id="direction">
<a href="#direction" class="doc-link"></a>
direction<span class="type-signature"> : <a href="Cartesian3.html">Cartesian3</a></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/Ray.js#L31">Core/Ray.js 31</a>
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</h4>
</div>
<div class="description">
The direction of the ray.
</div>
<dl class="details">
</dl>
<div class="nameContainer">
<h4 class="name" id="origin">
<a href="#origin" class="doc-link"></a>
origin<span class="type-signature"> : <a href="Cartesian3.html">Cartesian3</a></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/Ray.js#L25">Core/Ray.js 25</a>
</div>
</h4>
</div>
<div class="description">
The origin of the ray.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript"><a href="Cartesian3.html#.ZERO"><code>Cartesian3.ZERO</code></a></code>
</dl>
<h3 class="subsection-title">Methods</h3>
<div class="nameContainer">
<h4 class="name" id=".clone">
<a href="#.clone" class="doc-link"></a>
<span class="type-signature attribute-static">static</span> Cesium.Ray.clone<span class="signature">(ray, <span class="optional">result</span>)</span> &rarr; <span class="type-signature returnType"><a href="Ray.html">Ray</a></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/Ray.js#L41">Core/Ray.js 41</a>
</div>
</h4>
</div>
<div class="description">
Duplicates a Ray instance.
</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>ray</code></td>
<td class="type">
<span class="param-type"><a href="Ray.html">Ray</a></span>
</td>
<td class="description last">
The ray to duplicate.</td>
</tr>
<tr>
<td class="name"><code>result</code></td>
<td class="type">
<span class="param-type"><a href="Ray.html">Ray</a></span>
</td>
<td class="description last">
<span class="optional">optional</span>
The object onto which to store the result.</td>
</tr>
</tbody>
</table>
<h5>Returns:</h5>
<div class="param-desc">
The modified result parameter or a new Ray instance if one was not provided. (Returns undefined if ray is undefined)
</div>
<dl class="details">
</dl>
<div class="nameContainer">
<h4 class="name" id=".getPoint">
<a href="#.getPoint" class="doc-link"></a>
<span class="type-signature attribute-static">static</span> Cesium.Ray.getPoint<span class="signature">(ray, t, <span class="optional">result</span>)</span> &rarr; <span class="type-signature returnType"><a href="Cartesian3.html">Cartesian3</a></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/Ray.js#L67">Core/Ray.js 67</a>
</div>
</h4>
</div>
<div class="description">
Computes the point along the ray given by r(t) = o + t*d,
where o is the origin of the ray and d is the direction.
</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>ray</code></td>
<td class="type">
<span class="param-type"><a href="Ray.html">Ray</a></span>
</td>
<td class="description last">
The ray.</td>
</tr>
<tr>
<td class="name"><code>t</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="description last">
A scalar value.</td>
</tr>
<tr>
<td class="name"><code>result</code></td>
<td class="type">
<span class="param-type"><a href="Cartesian3.html">Cartesian3</a></span>
</td>
<td class="description last">
<span class="optional">optional</span>
The object in which the result will be stored.</td>
</tr>
</tbody>
</table>
<h5>Returns:</h5>
<div class="param-desc">
The modified result parameter, or a new instance if none was provided.
</div>
<dl class="details">
<h5>Example:</h5>
<pre><code class="language-javascript">//Get the first intersection point of a ray and an ellipsoid.
const intersection = Cesium.IntersectionTests.rayEllipsoid(ray, ellipsoid);
const point = Cesium.Ray.getPoint(ray, intersection.start);</code></pre>
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