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href="module-twgl_primitives.html#.createCylinderBuffers">createCylinderBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createCylinderVertices">createCylinderVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createDiscBufferInfo">createDiscBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createDiscBuffers">createDiscBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createDiscVertices">createDiscVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createPlaneBufferInfo">createPlaneBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createPlaneBuffers">createPlaneBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createPlaneVertices">createPlaneVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createSphereBufferInfo">createSphereBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createSphereBuffers">createSphereBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createSphereVertices">createSphereVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTorusBufferInfo">createTorusBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTorusBuffers">createTorusBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTorusVertices">createTorusVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTruncatedConeBufferInfo">createTruncatedConeBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTruncatedConeBuffers">createTruncatedConeBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createTruncatedConeVertices">createTruncatedConeVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createXYQuadBufferInfo">createXYQuadBufferInfo</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createXYQuadBuffers">createXYQuadBuffers</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.createXYQuadVertices">createXYQuadVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.deindexVertices">deindexVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.duplicateVertices">duplicateVertices</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.flattenNormals">flattenNormals</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.makeRandomVertexColors">makeRandomVertexColors</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a href="module-twgl_primitives.html#.reorientDirections">reorientDirections</a></span></li><li class="nav-item"><span class="nav-item-type type-function">F</span><span class="nav-item-name"><a 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<div id="main">
    
    <h1 class="page-title">twgl/vertexArrays</h1>
    

<section>

<header>
    
        
</header>

<article>
    <div class="container-overview">
    
        
            <div class="description"><p>vertex array object related functions</p>
<p>You should generally not need to use these functions. They are provided<br>
for those cases where you're doing something out of the ordinary<br>
and you need lower level access.</p>
<p>For backward compatibility they are available at both <code>twgl.attributes</code> and <code>twgl</code><br>
itself</p>
<p>See <a href="module-twgl.html"><code>module:twgl</code></a> for core functions</p></div>
        

<div class="section-method">


<dl class="details">

    
</dl>


</div>
        
    
    </div>

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

        
<div class="section-method">

    
    <h4 class="name" id=".createVAOAndSetAttributes"><span class="type-signature">(static) </span>createVAOAndSetAttributes<span class="signature">(gl, setters, attribs, indices<span class="signature-attributes">opt</span>)</span><span class="type-signature"> &rarr; {WebGLVertexArrayObject|null}</span></h4>

    
<div class="description">
    <p>Creates a vertex array object and then sets the attributes on it</p>
</div>


<dl class="details">

    
</dl>


    <h5>Parameters:</h5>
    

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

        <th>Type</th>

        
        <th>Attributes</th>
        

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

    <tbody>
    

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

            <td class="type">
            
                
<span class="param-type"><code>WebGLRenderingContext</code></span>


            </td>

            
                <td class="attributes">
                

                </td>
            

            <td class="description last">
                <p>The WebGLRenderingContext to use.</p>
                
            </td>
        </tr>

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

            <td class="type">
            
                
<span class="param-type"><code>Object.&lt;string, function()></code></span>


            </td>

            
                <td class="attributes">
                

                </td>
            

            <td class="description last">
                <p>Attribute setters as returned from createAttributeSetters</p>
                
            </td>
        </tr>

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

            <td class="type">
            
                
<span class="param-type"><code>Object.&lt;string, <a href="module-twgl.html#.AttribInfo">module:twgl.AttribInfo</a>></code></span>


            </td>

            
                <td class="attributes">
                

                </td>
            

            <td class="description last">
                <p>AttribInfos mapped by attribute name.</p>
                
            </td>
        </tr>

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

            <td class="type">
            
                
<span class="param-type"><code>WebGLBuffer</code></span>


            </td>

            
                <td class="attributes">
                
                    &lt;optional><br>
                

                </td>
            

            <td class="description last">
                <p>an optional ELEMENT_ARRAY_BUFFER of indices</p>
                
            </td>
        </tr>

    
    </tbody>
</table>


<div class="section-returns">
<h5>Returns:</h5>

        
<dl class="param-type">
    <dt>
        Type:
    </dt>
    <dd>
        
<span class="param-type"><code>WebGLVertexArrayObject</code></span>
|

<span class="param-type"><code>null</code></span>


    </dd>
</dl>


<div class="param-desc">
    <p>The created WebGLVertexArrayObject</p>
</div>

    
</div>


</div>
        
            
<div class="section-method">

    
    <h4 class="name" id=".createVAOFromBufferInfo"><span class="type-signature">(static) </span>createVAOFromBufferInfo<span class="signature">(gl, programInfo, bufferInfo, indices<span class="signature-attributes">opt</span>)</span><span class="type-signature"> &rarr; {WebGLVertexArrayObject|null}</span></h4>

    
<div class="description">
    <p>Creates a vertex array object and then sets the attributes<br>
on it</p>
</div>


<dl class="details">

    
</dl>


    <h5>Parameters:</h5>
    

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

        <th>Type</th>

        
        <th>Attributes</th>
        

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

    <tbody>
    

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

            <td class="type">
            
                
<span class="param-type"><code>WebGLRenderingContext</code></span>


            </td>

            
                <td class="attributes">
                

                </td>
            

            <td class="description last">
                <p>The WebGLRenderingContext<br>
to use.</p>
                
            </td>
        </tr>

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

            <td class="type">
            
                
<span class="param-type"><code>Object.&lt;string, function()></code></span>
|

<span class="param-type"><code><a href="module-twgl.html#.ProgramInfo">module:twgl.ProgramInfo</a></code></span>


            </td>

            
                <td class="attributes">
                

                </td>
            

            <td class="description last">
                <p>as returned from createProgramInfo or Attribute setters as returned from createAttributeSetters</p>
                
            </td>
        </tr>

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

            <td class="type">
            
                
<span class="param-type"><code><a href="module-twgl.html#.BufferInfo">module:twgl.BufferInfo</a></code></span>


            </td>

            
                <td class="attributes">
                

                </td>
            

            <td class="description last">
                <p>BufferInfo as returned from createBufferInfoFromArrays etc...</p>
                
            </td>
        </tr>

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

            <td class="type">
            
                
<span class="param-type"><code>WebGLBuffer</code></span>


            </td>

            
                <td class="attributes">
                
                    &lt;optional><br>
                

                </td>
            

            <td class="description last">
                <p>an optional ELEMENT_ARRAY_BUFFER of indices</p>
                
            </td>
        </tr>

    
    </tbody>
</table>


<div class="section-returns">
<h5>Returns:</h5>

        
<dl class="param-type">
    <dt>
        Type:
    </dt>
    <dd>
        
<span class="param-type"><code>WebGLVertexArrayObject</code></span>
|

<span class="param-type"><code>null</code></span>


    </dd>
</dl>


<div class="param-desc">
    <p>The created WebGLVertexArrayObject</p>
</div>

    
</div>


</div>
        
            
<div class="section-method">

    
    <h4 class="name" id=".createVertexArrayInfo"><span class="type-signature">(static) </span>createVertexArrayInfo<span class="signature">(gl, programInfo, bufferInfo)</span><span class="type-signature"> &rarr; {<a href="module-twgl.html#.VertexArrayInfo">module:twgl.VertexArrayInfo</a>}</span></h4>

    
<div class="description">
    <p>Creates a VertexArrayInfo from a BufferInfo and one or more ProgramInfos</p>
<p>This can be passed to <a href="module-twgl.html#.setBuffersAndAttributes"><code>module:twgl.setBuffersAndAttributes</code></a> and to<br>
<code>module:twgl:drawBufferInfo</code>.</p>
<blockquote>
<p><strong>IMPORTANT:</strong> Vertex Array Objects are <strong>not</strong> a direct analog for a BufferInfo. Vertex Array Objects<br>
assign buffers to specific attributes at creation time. That means they can only be used with programs<br>
who's attributes use the same attribute locations for the same purposes.</p>
</blockquote>
<blockquote>
<p>Bind your attribute locations by passing an array of attribute names to <a href="module-twgl.html#.createProgramInfo"><code>module:twgl.createProgramInfo</code></a><br>
or use WebGL 2's GLSL ES 3's <code>layout(location = &lt;num&gt;)</code> to make sure locations match.</p>
</blockquote>
<p>also</p>
<blockquote>
<p><strong>IMPORTANT:</strong> After calling twgl.setBuffersAndAttribute with a BufferInfo that uses a Vertex Array Object<br>
that Vertex Array Object will be bound. That means <strong>ANY MANIPULATION OF ELEMENT_ARRAY_BUFFER or ATTRIBUTES</strong><br>
will affect the Vertex Array Object state.</p>
</blockquote>
<blockquote>
<p>Call <code>gl.bindVertexArray(null)</code> to get back manipulating the global attributes and ELEMENT_ARRAY_BUFFER.</p>
</blockquote>
</div>


<dl class="details">

    
</dl>


    <h5>Parameters:</h5>
    

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

        <th>Type</th>

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

    <tbody>
    

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

            <td class="type">
            
                
<span class="param-type"><code>WebGLRenderingContext</code></span>


            </td>

            
            <td class="description last">
                <p>A WebGLRenderingContext</p>
                
            </td>
        </tr>

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

            <td class="type">
            
                
<span class="param-type"><code><a href="module-twgl.html#.ProgramInfo">module:twgl.ProgramInfo</a></code></span>
|

<span class="param-type"><code>Array.&lt;<a href="module-twgl.html#.ProgramInfo">module:twgl.ProgramInfo</a>></code></span>


            </td>

            
            <td class="description last">
                <p>a programInfo or array of programInfos</p>
                
            </td>
        </tr>

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

            <td class="type">
            
                
<span class="param-type"><code><a href="module-twgl.html#.BufferInfo">module:twgl.BufferInfo</a></code></span>


            </td>

            
            <td class="description last">
                <p>BufferInfo as returned from createBufferInfoFromArrays etc...</p>
<p>You need to make sure every attribute that will be used is bound. So for example assume shader 1<br>
uses attributes A, B, C and shader 2 uses attributes A, B, D. If you only pass in the programInfo<br>
for shader 1 then only attributes A, B, and C will have their attributes set because TWGL doesn't<br>
now attribute D's location.</p>
<p>So, you can pass in both shader 1 and shader 2's programInfo</p>
                
            </td>
        </tr>

    
    </tbody>
</table>


<div class="section-returns">
<h5>Returns:</h5>

        
<dl class="param-type">
    <dt>
        Type:
    </dt>
    <dd>
        
<span class="param-type"><code><a href="module-twgl.html#.VertexArrayInfo">module:twgl.VertexArrayInfo</a></code></span>


    </dd>
</dl>


<div class="param-desc">
    <p>The created VertexArrayInfo</p>
</div>

    
</div>


</div>
        
    
</article>

</section>


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