<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 3.0//EN" "http://www.web3d.org/specifications/x3d-3.0.dtd">
<X3D profile='Immersive' version='3.0 xmlns:xsd='http://www.w3.org/2001/XMLSchema-instance' xsd:noNamespaceSchemaLocation =' http://www.web3d.org/specifications/x3d-3.0.xsd '>
<head>
<meta name='titlecontent='Figure30_5ScriptTorusBuilder.x3d'/>
<meta name='creatorcontent='Figure 30.5, The VRML 2.0 Sourcebook, Copyright [1997] By Andrea L. Ames, David R. Nadeau, and John L. Moreland'/>
<meta name='referencecontent=' http://www.wiley.com/legacy/compbooks/vrml2sbk/ch30/30fig05.htm '/>
<meta name='translatorcontent='Don Brutzman'/>
<meta name='createdcontent='28 September 2000'/>
<meta name='modifiedcontent='11 January 2014'/>
<meta name='descriptioncontent='A torus shape built with a donut-maker program script. Also see Figures 31.6 and 31.7 for comparison.'/>
<meta name='identifiercontent=' http://www.web3d.org/x3d/content/examples/Vrml2Sourcebook/Chapter30Scripts/Figure30_5ScriptTorusBuilder.x3d '/>
<meta name='generatorcontent='X3D-Edit 3.3, https://savage.nps.edu/X3D-Edit'/>
<meta name='licensecontent=' ../../license.html'/>
</head>
<!--

Index for DEF nodes : Donut, DonutMakerExternalScript, DonutMakerInternalScript

Index for Viewpoint image : Viewpoint_1
-->
<Scene>
<Viewpoint description='Torusorientation='1 0 0 -0.78position='0 5 5'/>
<Group>
<Shape>
<!-- ROUTE information for Donut node:  [from DonutMakerInternalScript.spine_changed to set_spine ] [from DonutMakerInternalScript.crossSection_changed to set_crossSection ] -->
<Extrusion DEF='DonutbeginCap='falseconvex='falsecreaseAngle='1.57endCap='false'/>
<Appearance>
<Material diffuseColor='0 0.4 0.8'/>
</Appearance>
</Shape>
<Script DEF='DonutMakerExternalScript'
  url=' "donutmaker.js" "http://www.web3d.org/x3d/content/examples/Vrml2Sourcebook/Chapter30Scripts/donutmaker.js" '>
<field name='spineRadiustype='SFFloatvalue='2accessType='initializeOnly'/>
<field name='crossSectionRadiustype='SFFloatvalue='1accessType='initializeOnly'/>
<field name='spineResolutiontype='SFInt32value='16accessType='initializeOnly'/>
<field name='crossSectionResolutiontype='SFInt32value='16accessType='initializeOnly'/>
<field name='set_spineRadiustype='SFFloataccessType='inputOnly'/>
<field name='set_crossSectionRadiustype='SFFloataccessType='inputOnly'/>
<field name='spine_changedtype='MFVec3faccessType='outputOnly'/>
<field name='crossSection_changedtype='MFVec2faccessType='outputOnly'/>
</Script>
<!-- ROUTE information for DonutMakerInternalScript node:  [from spine_changed to Donut.set_spine ] [from crossSection_changed to Donut.set_crossSection ] -->
<Script DEF='DonutMakerInternalScript'>
<field name='spineRadiustype='SFFloatvalue='2accessType='initializeOnly'/>
<field name='crossSectionRadiustype='SFFloatvalue='1accessType='initializeOnly'/>
<field name='spineResolutiontype='SFInt32value='16accessType='initializeOnly'/>
<field name='crossSectionResolutiontype='SFInt32value='16accessType='initializeOnly'/>
<field name='set_spineRadiustype='SFFloataccessType='inputOnly'/>
<field name='set_crossSectionRadiustype='SFFloataccessType='inputOnly'/>
<field name='spine_changedtype='MFVec3faccessType='outputOnly'/>
<field name='crossSection_changedtype='MFVec2faccessType='outputOnly'/>
<![CDATA[
        
ecmascript:

function initialize( ) {
    generateCrossSection( );
    generateSpine( );
}

function set_crossSectionRadius( csr, ts ) {
    crossSectionRadius = csr;
    generateCrossSection( );
//  Browser.print ('crossSectionRadius = ' + csr);
}

function set_spineRadius( sr, ts ) {
    spineRadius = sr;
    generateSpine( );
//  Browser.print ('spineRadius = ' + sr);
}

function generateCrossSection( ) {
    angle = 0.0;
    delta = (2 * 3.141592653) / crossSectionResolution;
    for ( i = 0; i <= crossSectionResolution; i++ ) {
        crossSection_changed[i][0] =  crossSectionRadius * Math.cos( angle );
        crossSection_changed[i][1] = -crossSectionRadius * Math.sin( angle );
        angle += delta;
    }
    // added code to make ends meet
    crossSection_changed[crossSectionResolution + 1][0] = crossSection_changed[0][0];
    crossSection_changed[crossSectionResolution + 1][1] = crossSection_changed[0][1];
}

function generateSpine( ) {
    angle = 0.0;
    delta = (2 * 3.141592653) / spineResolution;
    for ( i = 0; i <= spineResolution; i++ ) {
        spine_changed[i][0] =  spineRadius * Math.cos( angle );
        spine_changed[i][1] =  0.0;
        spine_changed[i][2] = -spineRadius * Math.sin( angle );
        angle += delta;
    }
    // added code to make ends meet
    spine_changed[spineResolution + 1][0] = spine_changed[0][0];
    spine_changed[spineResolution + 1][1] = 0.0;
    spine_changed[spineResolution + 1][2] = spine_changed[0][2];
}

      
]]>
</Script>
</Group>
<!-- Either ROUTE from DonutMakerExternalScript or DonutMakerInternalScript, both methods work -->
<ROUTE fromNode='DonutMakerInternalScriptfromField='spine_changedtoNode='DonuttoField='set_spine'/>
<ROUTE fromNode='DonutMakerInternalScriptfromField='crossSection_changedtoNode='DonuttoField='set_crossSection'/>
</Scene>
</X3D>
<!--

Index for DEF nodes : Donut, DonutMakerExternalScript, DonutMakerInternalScript

Index for Viewpoint image : Viewpoint_1
-->

<!-- Color key: <X3dNode DEF='idName' field='value'/> matches <XmlElement DEF='idName' attribute='value'/>
(Light blue background: behavior node) (Grey background: inserted documentation) (Magenta background: X3D extensibility)
-->

<!-- Additional help information about X3D scenes: X3D Resources, X3D Scene Authoring Hints and X3D Tooltips -->