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							<!DOCTYPE html>
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    <title>PointPrimitiveCollection - Cesium Documentation</title>

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    <h1 class="page-title">
        <a href="index.html"><img src="images/CesiumLogo.png" class="cesiumLogo"></a>
        PointPrimitiveCollection
        <div class="titleCenterer"></div>
    </h1>

    
<section>

<header>
    
</header>

<article>
    <div class="container-overview">
    

<dt>
    <div class="nameContainer">
    <h4 class="name" id="PointPrimitiveCollection">
        <a href="#PointPrimitiveCollection" class="doc-link"></a>
        new Cesium.PointPrimitiveCollection<span class="signature">(<span class="optional">options</span>)</span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L114">Scene/PointPrimitiveCollection.js 114</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>

    
    <div class="description">
        A renderable collection of points.
<br /><br />
Points are added and removed from the collection using <a href="PointPrimitiveCollection.html#add"><code>PointPrimitiveCollection#add</code></a>
and <a href="PointPrimitiveCollection.html#remove"><code>PointPrimitiveCollection#remove</code></a>.
    </div>
    

        <h5>Performance:</h5>
        <p class="description">For best performance, prefer a few collections, each with many points, to
many collections with only a few points each.  Organize collections so that points
with the same update frequency are in the same collection, i.e., points that do not
change should be in one collection; points that change every frame should be in another
collection; and so on.</p>
    

<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">
            
                
                        <span class="optional">optional</span>
                
                
                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>modelMatrix</code></td>
            

            <td class="type">
            
                
<span class="param-type"><a href="Matrix4.html">Matrix4</a></span>


            </td>

            
                <td class="default">
                
                    <code class="language-javascript">Matrix4.IDENTITY</code>
                
                </td>
            

            <td class="description last">
            
                
                        <span class="optional">optional</span>
                
                
                The 4x4 transformation matrix that transforms each point from model to world coordinates.</td>
        </tr>

    
        <tr>
            
                <td class="name"><code>debugShowBoundingVolume</code></td>
            

            <td class="type">
            
                
<span class="param-type">Boolean</span>


            </td>

            
                <td class="default">
                
                    <code class="language-javascript">false</code>
                
                </td>
            

            <td class="description last">
            
                
                        <span class="optional">optional</span>
                
                
                For debugging only. Determines if this primitive's commands' bounding spheres are shown.</td>
        </tr>

    
    </tbody>
</table>
            </td>
        </tr>

    
    </tbody>
</table>
    

<dl class="details">
    

        <h5>Example:</h5>
        
    <pre><code class="language-javascript">// Create a pointPrimitive collection with two points
var points = scene.primitives.add(new Cesium.PointPrimitiveCollection());
points.add({
  position : new Cesium.Cartesian3(1.0, 2.0, 3.0),
  color : Cesium.Color.YELLOW
});
points.add({
  position : new Cesium.Cartesian3(4.0, 5.0, 6.0),
  color : Cesium.Color.CYAN
});</code></pre>

    
    <h5>See:</h5>
    <ul class="see-list">
        <li><a href="PointPrimitiveCollection.html#add">PointPrimitiveCollection#add</a></li>
    
        <li><a href="PointPrimitiveCollection.html#remove">PointPrimitiveCollection#remove</a></li>
    
        <li><a href="PointPrimitive.html">PointPrimitive</a></li>
    </ul>
    

</dl>

</dd>

    
    </div>

    
        <h3 class="subsection-title">Members</h3>

        <dl>
            
<dt>
    <div class="nameContainer">
    <h4 class="name" id="debugShowBoundingVolume">
        <a href="#debugShowBoundingVolume" class="doc-link"></a>
        debugShowBoundingVolume<span class="type-signature"> : Boolean</span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L198">Scene/PointPrimitiveCollection.js 198</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>
    
    <div class="description">
        This property is for debugging only; it is not for production use nor is it optimized.
<p>
Draws the bounding sphere for each draw command in the primitive.
</p>
    </div>
    

<dl class="details">
    

    <span class="details-header">Default Value:</span>
    <code class="language-javascript">false</code>
    

</dl>

</dd>

        
<dt>
    <div class="nameContainer">
    <h4 class="name" id="length">
        <a href="#length" class="doc-link"></a>
        length<span class="type-signature"> : Number</span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L232">Scene/PointPrimitiveCollection.js 232</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>
    
    <div class="description">
        Returns the number of points in this collection.  This is commonly used with
<a href="PointPrimitiveCollection.html#get"><code>PointPrimitiveCollection#get</code></a> to iterate over all the points
in the collection.
    </div>
    

<dl class="details">
    

</dl>

</dd>

        
<dt>
    <div class="nameContainer">
    <h4 class="name" id="modelMatrix">
        <a href="#modelMatrix" class="doc-link"></a>
        modelMatrix<span class="type-signature"> : <a href="Matrix4.html">Matrix4</a></span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L185">Scene/PointPrimitiveCollection.js 185</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>
    
    <div class="description">
        The 4x4 transformation matrix that transforms each point in this collection from model to world coordinates.
When this is the identity matrix, the pointPrimitives are drawn in world coordinates, i.e., Earth's WGS84 coordinates.
Local reference frames can be used by providing a different transformation matrix, like that returned
by <a href="Transforms.html#.eastNorthUpToFixedFrame"><code>Transforms.eastNorthUpToFixedFrame</code></a>.
    </div>
    

<dl class="details">
    

    <span class="details-header">Default Value:</span>
    <code class="language-javascript"><a href="Matrix4.html#.IDENTITY"><code>Matrix4.IDENTITY</code></a></code>
    

        <h5>Example:</h5>
        
    <pre><code class="language-javascript">var center = Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883);
pointPrimitives.modelMatrix = Cesium.Transforms.eastNorthUpToFixedFrame(center);
pointPrimitives.add({
  color : Cesium.Color.ORANGE,
  position : new Cesium.Cartesian3(0.0, 0.0, 0.0) // center
});
pointPrimitives.add({
  color : Cesium.Color.YELLOW,
  position : new Cesium.Cartesian3(1000000.0, 0.0, 0.0) // east
});
pointPrimitives.add({
  color : Cesium.Color.GREEN,
  position : new Cesium.Cartesian3(0.0, 1000000.0, 0.0) // north
});
pointPrimitives.add({
  color : Cesium.Color.CYAN,
  position : new Cesium.Cartesian3(0.0, 0.0, 1000000.0) // up
});</code></pre>

    
    <h5>See:</h5>
    <ul class="see-list">
        <li><a href="Transforms.html#.eastNorthUpToFixedFrame">Transforms.eastNorthUpToFixedFrame</a></li>
    </ul>
    

</dl>

</dd>

        </dl>
    

        <h3 class="subsection-title">Methods</h3>

        <dl>
            
<dt>
    <div class="nameContainer">
    <h4 class="name" id="add">
        <a href="#add" class="doc-link"></a>
        add<span class="signature">(<span class="optional">pointPrimitive</span>)</span> &rarr; <span class="type-signature returnType"><a href="PointPrimitive.html">PointPrimitive</a></span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L284">Scene/PointPrimitiveCollection.js 284</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>

    
    <div class="description">
        Creates and adds a point with the specified initial properties to the collection.
The added point is returned so it can be modified or removed from the collection later.
    </div>
    

        <h5>Performance:</h5>
        <p class="description">Calling <code>add</code> is expected constant time.  However, the collection's vertex buffer
is rewritten - an <code>O(n)</code> operation that also incurs CPU to GPU overhead.  For
best performance, add as many pointPrimitives as possible before calling <code>update</code>.</p>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>pointPrimitive</code></td>
            

            <td class="type">
            
                
<span class="param-type">Object</span>


            </td>

            
            <td class="description last">
            
                
                        <span class="optional">optional</span>
                
                
                A template describing the point's properties as shown in Example 1.</td>
        </tr>

    
    </tbody>
</table>
    

    <h5>Returns:</h5>
    
            
<div class="param-desc">
    The point that was added to the collection.
</div>


    <h5>Throws:</h5>
    <ul>
            <li>

    <div class="param-desc">
        
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>

: This object was destroyed, i.e., destroy() was called.
    </div>

</li>
        </ul>
    

<dl class="details">
    

        <h5>Examples:</h5>
        
    <pre><code class="language-javascript">// Example 1:  Add a point, specifying all the default values.
var p = pointPrimitives.add({
  show : true,
  position : Cesium.Cartesian3.ZERO,
  pixelSize : 10.0,
  color : Cesium.Color.WHITE,
  outlineColor : Cesium.Color.TRANSPARENT,
  outlineWidth : 0.0,
  id : undefined
});</code></pre>

    <pre><code class="language-javascript">// Example 2:  Specify only the point's cartographic position.
var p = pointPrimitives.add({
  position : Cesium.Cartesian3.fromDegrees(longitude, latitude, height)
});</code></pre>

    
    <h5>See:</h5>
    <ul class="see-list">
        <li><a href="PointPrimitiveCollection.html#remove">PointPrimitiveCollection#remove</a></li>
    
        <li><a href="PointPrimitiveCollection.html#removeAll">PointPrimitiveCollection#removeAll</a></li>
    </ul>
    

</dl>

</dd>

        
<dt>
    <div class="nameContainer">
    <h4 class="name" id="contains">
        <a href="#contains" class="doc-link"></a>
        contains<span class="signature">(<span class="optional">pointPrimitive</span>)</span> &rarr; <span class="type-signature returnType">Boolean</span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L391">Scene/PointPrimitiveCollection.js 391</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>

    
    <div class="description">
        Check whether this collection contains a given point.
    </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>pointPrimitive</code></td>
            

            <td class="type">
            
                
<span class="param-type"><a href="PointPrimitive.html">PointPrimitive</a></span>


            </td>

            
            <td class="description last">
            
                
                        <span class="optional">optional</span>
                
                
                The point to check for.</td>
        </tr>

    
    </tbody>
</table>
    

    <h5>Returns:</h5>
    
            
<div class="param-desc">
    true if this collection contains the point, false otherwise.
</div>


<dl class="details">
    

    <h5>See:</h5>
    <ul class="see-list">
        <li><a href="PointPrimitiveCollection.html#get">PointPrimitiveCollection#get</a></li>
    </ul>
    

</dl>

</dd>

        
<dt>
    <div class="nameContainer">
    <h4 class="name" id="destroy">
        <a href="#destroy" class="doc-link"></a>
        destroy<span class="signature">()</span> &rarr; <span class="type-signature returnType">undefined</span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L1016">Scene/PointPrimitiveCollection.js 1016</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>

    
    <div class="description">
        Destroys the WebGL resources held by this object.  Destroying an object allows for deterministic
release of WebGL resources, instead of relying on the garbage collector to destroy this object.
<br /><br />
Once an object is destroyed, it should not be used; calling any function other than
<code>isDestroyed</code> will result in a <a href="DeveloperError.html"><code>DeveloperError</code></a> exception.  Therefore,
assign the return value (<code>undefined</code>) to the object as done in the example.
    </div>
    

    <h5>Returns:</h5>
    
            
    <h5>Throws:</h5>
    <ul>
            <li>

    <div class="param-desc">
        
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>

: This object was destroyed, i.e., destroy() was called.
    </div>

</li>
        </ul>
    

<dl class="details">
    

        <h5>Example:</h5>
        
    <pre><code class="language-javascript">pointPrimitives = pointPrimitives &amp;&amp; pointPrimitives.destroy();</code></pre>

    
    <h5>See:</h5>
    <ul class="see-list">
        <li><a href="PointPrimitiveCollection.html#isDestroyed">PointPrimitiveCollection#isDestroyed</a></li>
    </ul>
    

</dl>

</dd>

        
<dt>
    <div class="nameContainer">
    <h4 class="name" id="get">
        <a href="#get" class="doc-link"></a>
        get<span class="signature">(index)</span> &rarr; <span class="type-signature returnType"><a href="PointPrimitive.html">PointPrimitive</a></span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L422">Scene/PointPrimitiveCollection.js 422</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>

    
    <div class="description">
        Returns the point in the collection at the specified index.  Indices are zero-based
and increase as points are added.  Removing a point shifts all points after
it to the left, changing their indices.  This function is commonly used with
<a href="PointPrimitiveCollection.html#length"><code>PointPrimitiveCollection#length</code></a> to iterate over all the points
in the collection.
    </div>
    

        <h5>Performance:</h5>
        <p class="description">Expected constant time.  If points were removed from the collection and
<code>PointPrimitiveCollection#update</code> was not called, an implicit <code>O(n)</code>
operation is performed.</p>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>index</code></td>
            

            <td class="type">
            
                
<span class="param-type">Number</span>


            </td>

            
            <td class="description last">
            
                The zero-based index of the point.</td>
        </tr>

    
    </tbody>
</table>
    

    <h5>Returns:</h5>
    
            
<div class="param-desc">
    The point at the specified index.
</div>


    <h5>Throws:</h5>
    <ul>
            <li>

    <div class="param-desc">
        
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>

: This object was destroyed, i.e., destroy() was called.
    </div>

</li>
        </ul>
    

<dl class="details">
    

        <h5>Example:</h5>
        
    <pre><code class="language-javascript">// Toggle the show property of every point in the collection
var len = pointPrimitives.length;
for (var i = 0; i &lt; len; ++i) {
  var p = pointPrimitives.get(i);
  p.show = !p.show;
}</code></pre>

    
    <h5>See:</h5>
    <ul class="see-list">
        <li><a href="PointPrimitiveCollection.html#length">PointPrimitiveCollection#length</a></li>
    </ul>
    

</dl>

</dd>

        
<dt>
    <div class="nameContainer">
    <h4 class="name" id="isDestroyed">
        <a href="#isDestroyed" class="doc-link"></a>
        isDestroyed<span class="signature">()</span> &rarr; <span class="type-signature returnType">Boolean</span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L994">Scene/PointPrimitiveCollection.js 994</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>

    
    <div class="description">
        Returns true if this object was destroyed; otherwise, false.
<br /><br />
If this object was destroyed, it should not be used; calling any function other than
<code>isDestroyed</code> will result in a <a href="DeveloperError.html"><code>DeveloperError</code></a> exception.
    </div>
    

    <h5>Returns:</h5>
    
            
<div class="param-desc">
    <code>true</code> if this object was destroyed; otherwise, <code>false</code>.
</div>


<dl class="details">
    

    <h5>See:</h5>
    <ul class="see-list">
        <li><a href="PointPrimitiveCollection.html#destroy">PointPrimitiveCollection#destroy</a></li>
    </ul>
    

</dl>

</dd>

        
<dt>
    <div class="nameContainer">
    <h4 class="name" id="remove">
        <a href="#remove" class="doc-link"></a>
        remove<span class="signature">(pointPrimitive)</span> &rarr; <span class="type-signature returnType">Boolean</span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L317">Scene/PointPrimitiveCollection.js 317</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>

    
    <div class="description">
        Removes a point from the collection.
    </div>
    

        <h5>Performance:</h5>
        <p class="description">Calling <code>remove</code> is expected constant time.  However, the collection's vertex buffer
is rewritten - an <code>O(n)</code> operation that also incurs CPU to GPU overhead.  For
best performance, remove as many points as possible before calling <code>update</code>.
If you intend to temporarily hide a point, it is usually more efficient to call
<a href="PointPrimitive.html#show"><code>PointPrimitive#show</code></a> instead of removing and re-adding the point.</p>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>pointPrimitive</code></td>
            

            <td class="type">
            
                
<span class="param-type"><a href="PointPrimitive.html">PointPrimitive</a></span>


            </td>

            
            <td class="description last">
            
                The point to remove.</td>
        </tr>

    
    </tbody>
</table>
    

    <h5>Returns:</h5>
    
            
<div class="param-desc">
    <code>true</code> if the point was removed; <code>false</code> if the point was not found in the collection.
</div>


    <h5>Throws:</h5>
    <ul>
            <li>

    <div class="param-desc">
        
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>

: This object was destroyed, i.e., destroy() was called.
    </div>

</li>
        </ul>
    

<dl class="details">
    

        <h5>Example:</h5>
        
    <pre><code class="language-javascript">var p = pointPrimitives.add(...);
pointPrimitives.remove(p);  // Returns true</code></pre>

    
    <h5>See:</h5>
    <ul class="see-list">
        <li><a href="PointPrimitiveCollection.html#add">PointPrimitiveCollection#add</a></li>
    
        <li><a href="PointPrimitiveCollection.html#removeAll">PointPrimitiveCollection#removeAll</a></li>
    
        <li><a href="PointPrimitive.html#show">PointPrimitive#show</a></li>
    </ul>
    

</dl>

</dd>

        
<dt>
    <div class="nameContainer">
    <h4 class="name" id="removeAll">
        <a href="#removeAll" class="doc-link"></a>
        removeAll<span class="signature">()</span>
        

<div class="source-link rightLinks">
    <a href="https://github.com/AnalyticalGraphicsInc/cesium/blob/1.29/Source/Scene/PointPrimitiveCollection.js#L346">Scene/PointPrimitiveCollection.js 346</a>
</div>


    </h4>

    </div>

    
</dt>
<dd>

    
    <div class="description">
        Removes all points from the collection.
    </div>
    

        <h5>Performance:</h5>
        <p class="description"><code>O(n)</code>.  It is more efficient to remove all the points
from a collection and then add new ones than to create a new collection entirely.</p>
    

    <h5>Throws:</h5>
    <ul>
            <li>

    <div class="param-desc">
        
<span class="param-type"><a href="DeveloperError.html">DeveloperError</a></span>

: This object was destroyed, i.e., destroy() was called.
    </div>

</li>
        </ul>
    

<dl class="details">
    

        <h5>Example:</h5>
        
    <pre><code class="language-javascript">pointPrimitives.add(...);
pointPrimitives.add(...);
pointPrimitives.removeAll();</code></pre>

    
    <h5>See:</h5>
    <ul class="see-list">
        <li><a href="PointPrimitiveCollection.html#add">PointPrimitiveCollection#add</a></li>
    
        <li><a href="PointPrimitiveCollection.html#remove">PointPrimitiveCollection#remove</a></li>
    </ul>
    

</dl>

</dd>

        </dl>
    

</article>

</section>


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