274 lines
8.5 KiB
HTML
274 lines
8.5 KiB
HTML
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<title>scale() | reference | Processing.js</title>
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<a href="http://processingjs.org/"><img src="../../images/header.png" width="177" height="42"></a>
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</div>
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<span class="tagline">a port of the Processing Visualization Language</span>
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<canvas width="940px" height="78px" data-processing-sources="/sketches/bannerSketch.pde"></canvas>
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<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>scale()</h3></td>
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</tr>
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<tr class="">
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<th scope="row">Examples</th>
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<td><div class="example"><img src="../scale_.gif" alt="example pic" /><pre class="margin">rect(30, 20, 50, 50);
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scale(0.5);
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rect(30, 20, 50, 50);</pre></div><div class="example"><img src="../scale_2.gif" alt="example pic" /><pre class="margin">rect(30, 20, 50, 50);
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scale(0.5, 1.3);
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rect(30, 20, 50, 50);</pre></div><div class="example"><img src="../scale_3.gif" alt="example pic" /><pre class="margin warning">// Scaling in 3D requires P3D
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// or OPENGL as a parameter to size()
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size(100, 100, P3D);
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fill(255, 102);
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translate(width/2+12, height/2);
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box(20, 20, 20);
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scale(2.5, 2.5, 2.5);
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box(20, 20, 20);</pre></div></td>
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</tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>Increasing and decreasing the size of an object by expanding and contracting vertices. Scale values are specified as decimal percentages. The function call <b>scale(2.0)</b> increases the dimension of a shape by 200%. Objects always scale from their relative origin to the coordinate system. Transformations apply to everything that happens after and subsequent calls to the function multiply the effect. For example, calling <b>scale(2.0)</b> and then <b>scale(1.5)</b> is the same as <b>scale(3.0)</b>. If <b>scale()</b> is called within <b>draw()</b>, the transformation is reset when the loop begins again. <span class="warning">Using this function with the <b>z</b> parameter requires passing P3D or OPENGL into the size() parameter as shown in the example above.</span> This function can be further controlled by <b>pushMatrix()</b> and <b>popMatrix()</b>.</td>
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</tr>
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<tr class="">
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<th scope="row">Syntax</th>
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<td><pre>scale(<kbd>size</kbd>);
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<span class="warning">scale(<kbd>x</kbd>, <kbd>y</kbd>);
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scale(<kbd>x</kbd>, <kbd>y</kbd>, <kbd>z</kbd>);</span></pre></td>
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</tr>
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<tr class="">
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<th scope="row">Parameters</th>
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<td><table cellpadding="0" cellspacing="0" border="0">
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<tr class="">
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<th scope="row">size</th>
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<td>float: percentage to scale the object</td>
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</tr>
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<tr class="">
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<th scope="row">x</th>
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<td>float: percentage to scale the object in the "x" axis</td>
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</tr>
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<tr class="">
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<th scope="row">y</th>
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<td>float: percentage to scale the object in the "y" axis</td>
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</tr>
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<tr class="warning">
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<th scope="row">z</th>
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<td>float: percentage to scale the object in the "z" axis</td>
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</tr>
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</table></td>
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</tr>
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<tr class="">
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<th scope="row">Usage</th>
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<td>Web & Application</td>
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</tr>
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<tr class="">
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<th scope="row">Related</th>
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<td><a href="http://processingjs.org/reference/rotateX_.html">rotateX() </a><br />
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<a href="http://processingjs.org/reference/rotateY_.html">rotateY() </a><br />
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<a href="http://processingjs.org/reference/rotateZ_.html">rotateZ() </a><br />
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<a href="../translate_.1">translate() </a><br />
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<a href="../pushMatrix_.1">pushMatrix()</a>
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<br /><a href="../popMatrix_.1">popMatrix()</a><br /></td>
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</tr>
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</table>
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<p>This reference is licensed under the CC BY-NC-SA 2.0 license:</p>
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Processing is an open visualization language developed by
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<a href="http://benfry.com/">Ben Fry</a> & <a href="http://reas.com/">Casey Reas</a>,
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and originally ported to Javascript by
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