185 lines
7.7 KiB
Plaintext
185 lines
7.7 KiB
Plaintext
<!DOCTYPE html>
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<title>set() | 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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<div class="span11">
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<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
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<tr>
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<th scope="row">Class</th>
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<td>PImage</td>
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</tr>
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>set()</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="PImage_set.jpg" alt="example pic" /><pre class="margin">// @pjs preload must be used to preload the image
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/* @pjs preload="tower.jpg"; */
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PImage img = loadImage("tower.jpg");
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background(img);
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noStroke();
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color c = img.get(60, 90);
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fill(c);
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rect(25, 25, 50, 50);</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><p>Changes the color of any pixel or writes an image directly into the image. The x and y parameter specify the pixel or the upper-left corner of the image.
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The color parameter specifies the color value.</p>
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<p>Setting the color of a single pixel with <b>set(x, y)</b> is easy, but not as fast as putting the data directly into <b>pixels[]</b>.
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The equivalent statement to "set(x, y, #000000)" using pixels[] is "pixels[y*width+x] = #000000". Processing requires calling <b>loadPixels()</b> to load the
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display window data into the <b>pixels[]</b> array before getting the values and calling <b>updatePixels()</b> to update the window. </p>
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<p>This function ignores <b>imageMode()</b>.</p></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><kbd>img</kbd>.set(<kbd>x</kbd>,<kbd>y</kbd>,<kbd>color</kbd>)</pre><br /></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>
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<table cellpadding="0" cellspacing="0" border="0">
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<tr class="">
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<th scope="row">img</th>
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<td>PImage: any variable of type PImage</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>int: x-coordinate of the pixel</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>int: y-coordinate of the pixel</td>
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</tr>
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<tr class="">
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<th scope="row">color</th>
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<td>color: any value of the color datatype</td>
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</tr>
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</table>
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</td>
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</tr>
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<tr class="">
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<th scope="row">Returns</th>
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<td>None</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="get_.1">get()</a><br />
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<a href="pixels_.1">pixels[]</a><br />
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<a href="copy_.1">copy()</a></td>
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</tr>
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</table>
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<div class="cclicense">
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<p>This reference is licensed under the CC BY-NC-SA 2.0 license:</p>
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<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/2.0/">
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<h3><a href="http://processingjs.org/download/">Downloads</a></h3>
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<li><a href="http://processingjs.org/download/">Download the latest version of Processing.js!</a></li>
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<h3><a href="http://processingjs.org/articles/">Articles</a></h3>
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<ul>
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<li><a href="http://processingjs.org/articles/jsQuickStart.html">Quick Start - JavaScript Developer</a></li>
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<li><a href="http://processingjs.org/articles/p5QuickStart.html">Quick Start - Processing Developer</a></li>
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<li><a href="http://processingjs.org/articles/RenderingModes.html">Rendering Modes</a></li>
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<li><a href="http://processingjs.org/articles/PomaxGuide.html">Pomax's Guide to processing-js</a></li>
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<h3><a>Web IDEs</a></h3>
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<li><a href="http://sketchpad.cc">Sketchpad.cc</a></li>
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<li><a href="http://processingjs.org/tools/processing-helper.html">Processing.js Helper</a></li>
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<li><a href="http://www.openprocessing.org">OpenProcessing.org</a></li>
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<div class="footer">
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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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<a href="http://ejohn.org/blog/processingjs/">John Resig</a>.
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Processing.js is maintained by the Processing.js team.
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