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2022-07-05 16:56:29 +08:00
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<title>ShowGeometryInstanceAttribute - Cesium Documentation</title>
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ShowGeometryInstanceAttribute
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<article>
<div class="container-overview">
<div class="nameContainer">
<h4 class="name" id="ShowGeometryInstanceAttribute">
<a href="#ShowGeometryInstanceAttribute" class="doc-link"></a>
new Cesium.ShowGeometryInstanceAttribute<span class="signature">(<span class="optional">show</span>)</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/ShowGeometryInstanceAttribute.js#L33">Core/ShowGeometryInstanceAttribute.js 33</a>
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</h4>
</div>
<div class="description">
Value and type information for per-instance geometry attribute that determines if the geometry instance will be shown.
</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>show</code></td>
<td class="type">
<span class="param-type">Boolean</span>
</td>
<td class="default">
<code class="language-javascript">true</code>
</td>
<td class="description last">
<span class="optional">optional</span>
Determines if the geometry instance will be shown.</td>
</tr>
</tbody>
</table>
<dl class="details">
<h5>Example:</h5>
<pre><code class="language-javascript">const instance = new Cesium.GeometryInstance({
geometry : new Cesium.BoxGeometry({
vertexFormat : Cesium.VertexFormat.POSITION_AND_NORMAL,
minimum : new Cesium.Cartesian3(-250000.0, -250000.0, -250000.0),
maximum : new Cesium.Cartesian3(250000.0, 250000.0, 250000.0)
}),
modelMatrix : Cesium.Matrix4.multiplyByTranslation(Cesium.Transforms.eastNorthUpToFixedFrame(
Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883)), new Cesium.Cartesian3(0.0, 0.0, 1000000.0), new Cesium.Matrix4()),
id : 'box',
attributes : {
show : new Cesium.ShowGeometryInstanceAttribute(false)
}
});</code></pre>
<h5>See:</h5>
<ul class="see-list">
<li><a href="GeometryInstance.html">GeometryInstance</a></li>
<li><a href="GeometryInstanceAttribute.html">GeometryInstanceAttribute</a></li>
</ul>
</dl>
</div>
<h3 class="subsection-title">Members</h3>
<div class="nameContainer">
<h4 class="name" id="componentDatatype">
<a href="#componentDatatype" class="doc-link"></a>
<span class="type-signature attribute-readonly">readonly</span> componentDatatype<span class="type-signature"> : <a href="global.html#ComponentDatatype">ComponentDatatype</a></span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/ShowGeometryInstanceAttribute.js#L58">Core/ShowGeometryInstanceAttribute.js 58</a>
</div>
</h4>
</div>
<div class="description">
The datatype of each component in the attribute, e.g., individual elements in
<a href="ColorGeometryInstanceAttribute.html#value"><code>ColorGeometryInstanceAttribute#value</code></a>.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript"><a href="global.html#ComponentDatatype#.UNSIGNED_BYTE"><code>ComponentDatatype.UNSIGNED_BYTE</code></a></code>
</dl>
<div class="nameContainer">
<h4 class="name" id="componentsPerAttribute">
<a href="#componentsPerAttribute" class="doc-link"></a>
<span class="type-signature attribute-readonly">readonly</span> componentsPerAttribute<span class="type-signature"> : Number</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/ShowGeometryInstanceAttribute.js#L74">Core/ShowGeometryInstanceAttribute.js 74</a>
</div>
</h4>
</div>
<div class="description">
The number of components in the attributes, i.e., <a href="ColorGeometryInstanceAttribute.html#value"><code>ColorGeometryInstanceAttribute#value</code></a>.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript">1</code>
</dl>
<div class="nameContainer">
<h4 class="name" id="normalize">
<a href="#normalize" class="doc-link"></a>
<span class="type-signature attribute-readonly">readonly</span> normalize<span class="type-signature"> : Boolean</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/ShowGeometryInstanceAttribute.js#L92">Core/ShowGeometryInstanceAttribute.js 92</a>
</div>
</h4>
</div>
<div class="description">
When <code>true</code> and <code>componentDatatype</code> is an integer format,
indicate that the components should be mapped to the range [0, 1] (unsigned)
or [-1, 1] (signed) when they are accessed as floating-point for rendering.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript">true</code>
</dl>
<div class="nameContainer">
<h4 class="name" id="value">
<a href="#value" class="doc-link"></a>
value<span class="type-signature"> : Uint8Array</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/ShowGeometryInstanceAttribute.js#L43">Core/ShowGeometryInstanceAttribute.js 43</a>
</div>
</h4>
</div>
<div class="description">
The values for the attributes stored in a typed array.
</div>
<dl class="details">
<span class="details-header">Default Value:</span>
<code class="language-javascript">[1.0]</code>
</dl>
<h3 class="subsection-title">Methods</h3>
<div class="nameContainer">
<h4 class="name" id=".toValue">
<a href="#.toValue" class="doc-link"></a>
<span class="type-signature attribute-static">static</span> Cesium.ShowGeometryInstanceAttribute.toValue<span class="signature">(show, <span class="optional">result</span>)</span> &rarr; <span class="type-signature returnType">Uint8Array</span>
<div class="source-link rightLinks">
<a href="https://github.com/CesiumGS/cesium/blob/1.91/Source/Core/ShowGeometryInstanceAttribute.js#L110">Core/ShowGeometryInstanceAttribute.js 110</a>
</div>
</h4>
</div>
<div class="description">
Converts a boolean show to a typed array that can be used to assign a show attribute.
</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>show</code></td>
<td class="type">
<span class="param-type">Boolean</span>
</td>
<td class="description last">
The show value.</td>
</tr>
<tr>
<td class="name"><code>result</code></td>
<td class="type">
<span class="param-type">Uint8Array</span>
</td>
<td class="description last">
<span class="optional">optional</span>
The array to store the result in, if undefined a new instance will be created.</td>
</tr>
</tbody>
</table>
<h5>Returns:</h5>
<div class="param-desc">
The modified result parameter or a new instance if result was undefined.
</div>
<dl class="details">
<h5>Example:</h5>
<pre><code class="language-javascript">const attributes = primitive.getGeometryInstanceAttributes('an id');
attributes.show = Cesium.ShowGeometryInstanceAttribute.toValue(true, attributes.show);</code></pre>
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