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development_node_Script.html
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development_node_Script.html
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<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Mobile Widgets</title>
<link rel="stylesheet" href="style/style.css" />
<link rel="shortcut icon" href="images/favicon.ico" type="image/x-icon" />
<script type="text/javascript" src="js/StructureElts.js"></script>
<script type="text/javascript" src="js/Structure.js"></script>
<script type="text/javascript" src="js/DocElements.js"></script>
</head>
<body>
<script type="text/javascript">
<!--
idCurrentPage = "development_node_Script";
beginPage();
//-->
</script>
<h1 class="title">Script node</h1>
<script type="text/javascript">
<!--
addIndex();
//-->
</script>
<script type="text/javascript">addTitle("Interface", 1);</script>
<textarea wrap="off" readonly="readonly" rows="3" cols="80">
Script {
SFString url ""
}
</textarea>
<br/>
<script type="text/javascript">addTitle("Description", 1);</script>
<p>
Implements scripting facility with some limitations (see <a href="faq.html">FAQ</a>).
</p>
<p>
Script node enable to define complex interactions. Modifying script field
call/launch function of the same name in the script. You can access to each VRML
node of the scene from the script, based on a DOM system.
</p>
<br/>
<script type="text/javascript">addTitle("Principles", 1);</script>
<ul>
<li>define an internal field in Script node</li>
<li>define a function which has the same name than the field</li>
<li>define a ROUTE TO this field</li>
<li>the function is launched when field if modified</li>
</ul>
<br/>
<script type="text/javascript">addTitle("Scope", 1);</script>
<ul>
<li>eventIn, exposedField : a function can be linked to the field</li>
<li>eventOut : output from a function (can be used by ROUTE)</li>
<li>field : local variable</li>
</ul>
<p>Example :</p>
<textarea wrap="off" readonly="readonly" rows="5" cols="80">
eventIn SFTime keyPressed
eventOut SFVec2f newValue
exposedField SFColor currentColor 1 1 1
field SFFloat coefficient 3.5
</textarea>
<br/>
<script type="text/javascript">addTitle("Fields", 1);</script>
<p>
<b>SFString url ""</b> :<br/>
The content of the script.
</p>
<br/>
<script type="text/javascript">addTitle("Syntax", 1);</script>
<p>
A function is written in javascript. You can use global or local variables. You
can use internal functions (not linked to a field). <b>initialize()</b> is a
special function launched at Script creation.<br/>
DOM access possible by positioning keyword <b>USE</b> after field. The node is
accessible by pointed syntax.
</p>
<script type="text/javascript">addTitle("Limitations", 1);</script>
<p>
The script is compiled => everything should be known before execution.<br/>
Our implementation doesn't include the "object" part of javascript BUT you can use protos and DOM.
</p>
<br/>
<script type="text/javascript">addTitle("Example", 1);</script>
<textarea wrap="off" readonly="readonly" rows="15" cols="80">
#VRML V2.0 utf8
DEF input InputSensor { url "A" activate FALSE }
DEF script Script {
eventIn SFTime keyPressed
field SFTime aTimeValue 0
field SFInt32 anIntValue 13
field SFFloat aFloatValue 3.1415
field SFBool aBooleanValue TRUE
field MFInt32 anIntArray [1 2 3 4 5 6]
field MFFloat aFloatArray [1.1 2.2 3.3 4.4 5.5 6.6]
field SFNode input IS input
url "javascript:
function initialize () {
Browser.print ('Hello world !');
# Activate the InputSensor
input.activate = true;
}
function keyPressed () {
Browser.print ('User pressed on the key: A');
}
"
}
ROUTE input.eventTime TO script.keyPressed
</textarea>
<br/>
<script type="text/javascript">
<!--
addBackPageNavigator('widgets_development_nodes_ref', '');
//-->
</script>
<script type="text/javascript">
<!--
endPage();
//-->
</script>
</body>
</html>