197 lines
8.8 KiB
HTML
197 lines
8.8 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<title>arc() \ Language (API) \ Processing 2+</title>
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<meta name="Author" content="Processing Foundation" />
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<meta name="Keywords" content="Processing, Sketchbook, Programming, Coding, Code, Art, Design" />
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<meta name="Description" content="Processing is a flexible software sketchbook and a language for learning how to code within the context of the visual arts. Since 2001, Processing has promoted software literacy within the visual arts and visual literacy within technology." />
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<a href="libraries/index.html" >Libraries</a><br>
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<a href="tools/index.html">Tools</a><br>
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<a href="environment/index.html">Environment</a><br>
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<!-- ==================================== CONTENT - Headers ============================ -->
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<div class="content">
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<p class="ref-notice">This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, <a href="https://github.com/processing/processing-docs/issues?state=open">please let us know</a>. If you prefer a more technical reference, visit the <a href="http://processing.github.io/processing-javadocs/core/">Processing Core Javadoc</a> and <a href="http://processing.github.io/processing-javadocs/libraries/">Libraries Javadoc</a>.</p>
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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>arc()</h3></td>
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</tr>
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<tr class="">
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<tr class=""><th scope="row">Examples</th><td><div class="example"><img src="images/arc_.png" alt="example pic" /><pre class="margin">
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arc(50, 55, 50, 50, 0, HALF_PI);
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noFill();
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arc(50, 55, 60, 60, HALF_PI, PI);
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arc(50, 55, 70, 70, PI, PI+QUARTER_PI);
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arc(50, 55, 80, 80, PI+QUARTER_PI, TWO_PI);
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</pre></div>
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<div class="example"><img src="images/arc_2.png" alt="example pic" /><pre class="margin">
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arc(50, 50, 80, 80, 0, PI+QUARTER_PI, OPEN);
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</pre></div>
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<div class="example"><img src="images/arc_3.png" alt="example pic" /><pre class="margin">
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arc(50, 50, 80, 80, 0, PI+QUARTER_PI, CHORD);
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</pre></div>
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<div class="example"><img src="images/arc_4.png" alt="example pic" /><pre class="margin">
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arc(50, 50, 80, 80, 0, PI+QUARTER_PI, PIE);
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</pre></div>
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</td></tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>
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Draws an arc to the screen. Arcs are drawn along the outer edge of an ellipse defined by the <b>a</b>, <b>b</b>, <b>c</b>, and <b>d</b> parameters. The origin of the arc's ellipse may be changed with the <b>ellipseMode()</b> function. Use the <b>start</b> and <b>stop</b> parameters to specify the angles (in radians) at which to draw the arc.<br />
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<br />
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There are three ways to draw an arc; the rendering technique used is defined by the optional seventh parameter. The three options, depicted in the above examples, are PIE, OPEN, and CHORD. The default mode is the OPEN stroke with a PIE fill.<br />
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<br />
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In some cases, the <b>arc()</b> function isn't accurate enough for smooth drawing. For example, the shape may jitter on screen when rotating slowly. If you're having an issue with how arcs are rendered, you'll need to draw the arc yourself with <b>beginShape()</b>/<b>endShape()</b> or a <b>PShape</b>.
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</td>
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</tr>
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<tr class=""><th scope="row">Syntax</th><td><pre>arc(<kbd>a</kbd>, <kbd>b</kbd>, <kbd>c</kbd>, <kbd>d</kbd>, <kbd>start</kbd>, <kbd>stop</kbd>)
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arc(<kbd>a</kbd>, <kbd>b</kbd>, <kbd>c</kbd>, <kbd>d</kbd>, <kbd>start</kbd>, <kbd>stop</kbd>, <kbd>mode</kbd>)</pre></td></tr>
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<tr class=""> <th scope="row">Parameters</th><td><table cellpadding="0" cellspacing="0" border="0"><tr class="">
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<th scope="row" class="code">a</th>
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<td>float: x-coordinate of the arc's ellipse</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">b</th>
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<td>float: y-coordinate of the arc's ellipse</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">c</th>
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<td>float: width of the arc's ellipse by default</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">d</th>
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<td>float: height of the arc's ellipse by default</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">start</th>
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<td>float: angle to start the arc, specified in radians</td>
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</tr>
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<tr class="">
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<th scope="row" class="code">stop</th>
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<td>float: angle to stop the arc, specified in radians</td>
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</tr></table></td> </tr>
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<tr class=""><th scope="row">Returns</th><td class="code">void</td></tr>
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<tr class=""><th scope="row">Related</th><td><a class="code" href="ellipse_.html">ellipse()</a><br />
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<a class="code" href="ellipseMode_.html">ellipseMode()</a><br />
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<a class="code" href="radians_.html">radians()</a><br />
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<a class="code" href="degrees_.html">degrees()</a><br /></td></tr>
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</table>
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Updated on April 30, 2017 02:33:18pm EDT<br /><br />
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