javascript
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tentone.escher.js
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>JSDoc: Class: Renderer</title>

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<div id="main">

    <h1 class="page-title">Class: Renderer</h1>

    
<section>

<header>
    
        <h2><span class="attribs"><span class="type-signature"></span></span>Renderer<span class="signature">()</span><span class="type-signature"></span></h2>
        
    
</header>

<article>
    <div class="container-overview">
    
        
    <h4 class="name" id="Renderer"><span class="type-signature"></span>new Renderer<span class="signature">()</span><span class="type-signature"></span></h4>
    

<div class="description">
    The renderer is resposible for drawing the structure into the canvas element.

Its also resposible for managing the canvas state.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="Renderer.js.html">Renderer.js</a>, <a href="Renderer.js.html#line13">line 13</a>
    </li></ul></dd>
    

</dl>


    </div>

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

        
<h4 class="name" id="autoClear"><span class="type-signature"></span>autoClear<span class="type-signature"></span></h4>


<div class="description">
    Indicates if the canvas should be automatically cleared on each new frame.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="Renderer.js.html">Renderer.js</a>, <a href="Renderer.js.html#line44">line 44</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="canvas"><span class="type-signature"></span>canvas<span class="type-signature"></span></h4>


<div class="description">
    Canvas DOM element, has to be managed by the user.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="Renderer.js.html">Renderer.js</a>, <a href="Renderer.js.html#line26">line 26</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="context"><span class="type-signature"></span>context<span class="type-signature"></span></h4>


<div class="description">
    Canvas 2D rendering context used to draw content.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="Renderer.js.html">Renderer.js</a>, <a href="Renderer.js.html#line31">line 31</a>
    </li></ul></dd>
    

</dl>


<h4 class="name" id="pointer"><span class="type-signature"></span>pointer<span class="type-signature"></span></h4>


<div class="description">
    Pointer input handler object.
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="Renderer.js.html">Renderer.js</a>, <a href="Renderer.js.html#line38">line 38</a>
    </li></ul></dd>
    

</dl>


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

        
    <h4 class="name" id="createRenderLoop"><span class="type-signature"></span>createRenderLoop<span class="signature">(group, viewport, onUpdate)</span><span class="type-signature"></span></h4>
    

<div class="description">
    Creates a infinite render loop to render the group into a viewport each frame.

The render loop cannot be destroyed, and it automatically creates a viewport controls object.
</div>


    <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>group</code></td>
            

            <td class="type">
            
                
<span class="param-type"><a href="Object2D.html">Object2D</a></span>


            </td>

            
            <td class="description last">Group to be rendererd.</td>
        </tr>

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

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


            </td>

            
            <td class="description last">Viewport into the objects.</td>
        </tr>

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

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


            </td>

            
            <td class="description last">Function called before rendering the frame.</td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="Renderer.js.html">Renderer.js</a>, <a href="Renderer.js.html#line56">line 56</a>
    </li></ul></dd>
    

</dl>


    <h4 class="name" id="update"><span class="type-signature"></span>update<span class="signature">(object, viewport)</span><span class="type-signature"></span></h4>
    

<div class="description">
    Update the renderer state, update the input handlers, calculate the object and viewport transformation matrices.

Render the object using the viewport into a canvas element.

The canvas state is saved and restored for each individual object, ensuring that the code of one object does not affect another one.

Should be called at a fixed rate preferably using the requestAnimationFrame() method, its also possible to use the createRenderLoop() method, that automatically creates a infinite render loop.
</div>


    <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>object</code></td>
            

            <td class="type">
            
            </td>

            
            <td class="description last">Object to be updated.</td>
        </tr>

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

            <td class="type">
            
            </td>

            
            <td class="description last">Viewport to be updated (should be the one where the objects will be rendered after).</td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="Renderer.js.html">Renderer.js</a>, <a href="Renderer.js.html#line89">line 89</a>
    </li></ul></dd>
    

</dl>


</article>

</section>


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