222 lines
7.5 KiB
HTML
222 lines
7.5 KiB
HTML
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<title>pixels[] | 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 class="name-row">
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<th scope="row">Name</th>
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<td><h3>pixels[]</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="../pixels.gif" alt="example pic" /><pre class="margin">color pink = color(255, 102, 204);
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loadPixels();
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for (int i = 0; i < (width*height/2)-width/2; i++) {
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pixels[i] = pink;
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}
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updatePixels();</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>Array containing the values for all the pixels in the display window. These values are of the color datatype. This array is the size of the display window. For example, if the image is 100x100 pixels, there will be 10000 values and if the window is 200x300 pixels, there will be 60000 values. The <b>index</b> value defines the position of a value within the array. For example, the statment <b>color b = pixels[230]</b> will set the variable <b>b</b> to be equal to the value at that location in the array. <br /><br /> Before accessing this array, the data must loaded with the <b>loadPixels()</b> functions. After the array data has been modified, the <b>updatePixels()</b> function must be loaded to update the changes. Without <b>loadPixels()</b>, running the code may (or will in future releases) result in a NullPointerException.</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>pixels[<kbd>index</kbd>]</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">index</th>
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<td>int: must not exceed the size of the array</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>
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<a href="../loadPixels_.1">loadPixels()</a><br />
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<a href="../updatePixels_.1">updatePixels()</a><br />
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<a href="../get_.1">get()</a><br />
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<a href="../set_.1">set()</a><br />
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</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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<a href="http://ejohn.org/blog/processingjs/">John Resig</a>.
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