169 lines
8.0 KiB
HTML
169 lines
8.0 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
|
<head>
|
|
<title>pmouseX \ Language (API) \ Processing 2+</title>
|
|
|
|
<link rel="icon" href="/favicon.ico" type="image/x-icon" />
|
|
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="Author" content="Processing Foundation" />
|
|
<meta name="Publisher" content="Processing Foundation" />
|
|
<meta name="Keywords" content="Processing, Sketchbook, Programming, Coding, Code, Art, Design" />
|
|
<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." />
|
|
<meta name="Copyright" content="All contents copyright the Processing Foundation, Ben Fry, Casey Reas, and the MIT Media Laboratory" />
|
|
|
|
<script src="javascript/modernizr-2.6.2.touch.js" type="text/javascript"></script>
|
|
<link href="css/style.css" rel="stylesheet" type="text/css" />
|
|
|
|
</head>
|
|
<body id="Langauge-en" onload="" >
|
|
|
|
<!-- ==================================== PAGE ============================ -->
|
|
<div id="container">
|
|
|
|
|
|
<!-- ==================================== HEADER ============================ -->
|
|
|
|
<div id="ribbon">
|
|
<ul class="left">
|
|
<li class="highlight"><a href="http://processing.org/">Processing</a></li>
|
|
<li><a href="http://p5js.org/">p5.js</a></li>
|
|
<li><a href="http://py.processing.org/">Processing.py</a></li>
|
|
<li><a href="http://android.processing.org/">Processing for Android</a></li>
|
|
</ul>
|
|
<ul class="right">
|
|
<li><a href="https://processingfoundation.org/">Processing Foundation</a></li>
|
|
</ul>
|
|
<div class="clear"></div>
|
|
</div>
|
|
<div id="header">
|
|
<a href="/" title="Back to the Processing cover."><div class="processing-logo no-cover" alt="Processing cover"></div></a>
|
|
<form name="search" method="get" action="//www.google.com/search">
|
|
<p><input type="hidden" name="as_sitesearch" value="processing.org" />
|
|
<input type="text" name="as_q" value="" size="20" class="text" />
|
|
<input type="submit" value=" " /></p>
|
|
</form>
|
|
</div>
|
|
<a id="TOP" name="TOP"></a>
|
|
|
|
<div id="navigation">
|
|
<div class="navBar" id="mainnav">
|
|
<a href="index.html" class='active'>Language</a><br>
|
|
<a href="libraries/index.html" >Libraries</a><br>
|
|
<a href="tools/index.html">Tools</a><br>
|
|
<a href="environment/index.html">Environment</a><br>
|
|
</div>
|
|
|
|
<script> document.querySelectorAll(".processing-logo")[0].className = "processing-logo"; </script>
|
|
</div>
|
|
|
|
<!-- ==================================== CONTENT - Headers ============================ -->
|
|
<div class="content">
|
|
|
|
<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>
|
|
|
|
<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
|
|
|
|
|
|
<tr class="name-row">
|
|
<th scope="row">Name</th>
|
|
|
|
<td><h3>pmouseX</h3></td>
|
|
</tr>
|
|
|
|
<tr class="">
|
|
|
|
<tr class=""><th scope="row">Examples</th><td><div class="example"><pre >
|
|
// Move the mouse quickly to see the difference
|
|
// between the current and previous position
|
|
void draw() {
|
|
background(204);
|
|
line(mouseX, 20, pmouseX, 80);
|
|
println(mouseX + " : " + pmouseX);
|
|
}
|
|
</pre></div>
|
|
</td></tr>
|
|
|
|
<tr class="">
|
|
<th scope="row">Description</th>
|
|
<td>
|
|
The system variable <b>pmouseX</b> always contains the horizontal position of the mouse in the frame previous to the current frame.
|
|
<br /><br />
|
|
You may find that <b>pmouseX</b> and <b>pmouseY</b> have different values when referenced inside of <b>draw()</b> and inside of mouse events like <b>mousePressed()</b> and <b>mouseMoved()</b>. Inside <b>draw()</b>, <b>pmouseX</b> and <b>pmouseY</b> update only once per frame (once per trip through the <b>draw()</b> loop). But inside mouse events, they update each time the event is called. If these values weren't updated immediately during mouse events, then the mouse position would be read only once per frame, resulting in slight delays and choppy interaction. If the mouse variables were always updated multiple times per frame, then something like <b>line(pmouseX, pmouseY, mouseX, mouseY)</b> inside <b>draw()</b> would have lots of gaps, because <b>pmouseX</b> may have changed several times in between the calls to <b>line()</b>.<br /><br />
|
|
If you want values relative to the previous frame, use <b>pmouseX</b> and <b>pmouseY</b> inside <b>draw()</b>. If you want continuous response, use <b>pmouseX</b> and <b>pmouseY</b> inside the mouse event functions.
|
|
</td>
|
|
</tr>
|
|
|
|
|
|
|
|
|
|
|
|
<tr class=""><th scope="row">Related</th><td><a class="code" href="mouseX.html">mouseX</a><br />
|
|
<a class="code" href="mouseY.html">mouseY</a><br />
|
|
<a class="code" href="pmouseY.html">pmouseY</a><br />
|
|
<a class="code" href="mousePressed.html">mousePressed</a><br />
|
|
<a class="code" href="mousePressed_.html">mousePressed()</a><br />
|
|
<a class="code" href="mouseReleased_.html">mouseReleased()</a><br />
|
|
<a class="code" href="mouseClicked_.html">mouseClicked()</a><br />
|
|
<a class="code" href="mouseMoved_.html">mouseMoved()</a><br />
|
|
<a class="code" href="mouseDragged_.html">mouseDragged()</a><br />
|
|
<a class="code" href="mouseButton.html">mouseButton</a><br />
|
|
<a class="code" href="mouseWheel_.html">mouseWheel()</a><br /></td></tr>
|
|
</table>
|
|
|
|
Updated on April 30, 2017 02:33:19pm EDT<br /><br />
|
|
|
|
<!-- Creative Commons License -->
|
|
|
|
<div class="license">
|
|
<a rel="license" href="//creativecommons.org/licenses/by-nc-sa/4.0/"><img alt="Creative Commons License" style="border: none" src="https://licensebuttons.net/l/by-nc-sa/4.0/88x31.png" /></a>
|
|
</div>
|
|
<!--
|
|
|
|
<?xpacket begin='' id=''?>
|
|
<x:xmpmeta xmlns:x='adobe:ns:meta/'>
|
|
<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'>
|
|
<rdf:Description rdf:about=''
|
|
xmlns:xapRights='http://ns.adobe.com/xap/1.0/rights/'>
|
|
<xapRights:Marked>True</xapRights:Marked>
|
|
</rdf:Description>
|
|
<rdf:Description rdf:about=''
|
|
xmlns:xapRights='http://ns.adobe.com/xap/1.0/rights/'
|
|
>
|
|
<xapRights:UsageTerms>
|
|
<rdf:Alt>
|
|
<rdf:li xml:lang='x-default' >This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a>.</rdf:li>
|
|
<rdf:li xml:lang='en' >This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a>.</rdf:li>
|
|
</rdf:Alt>
|
|
</xapRights:UsageTerms>
|
|
</rdf:Description>
|
|
<rdf:Description rdf:about=''
|
|
xmlns:cc='http://creativecommons.org/ns#'>
|
|
<cc:license rdf:resource='http://creativecommons.org/licenses/by-nc-sa/4.0/'/>
|
|
</rdf:Description>
|
|
|
|
</rdf:RDF>
|
|
</x:xmpmeta>
|
|
<?xpacket end='r'?>
|
|
|
|
-->
|
|
|
|
</div>
|
|
|
|
<!-- ==================================== FOOTER ============================ -->
|
|
<div id="footer">
|
|
|
|
<div id="copyright">Processing is an open project intiated by <a href="http://benfry.com/">Ben Fry</a> and <a href="http://reas.com">Casey Reas</a>. It is developed by a <a href="http://processing.org/about/people/">team of volunteers</a>.</div>
|
|
<div id="colophon">
|
|
|
|
<a href="copyright.html">© Info</a>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
</div>
|
|
<script src="javascript/jquery-1.9.1.min.js"></script>
|
|
<script src="javascript/site.js" type="text/javascript"></script>
|
|
</body>
|
|
</html>
|