<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 3.0//EN" "https://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 =' https://www.web3d.org/specifications/x3d-3.0.xsd ' >
<head>
<component level='1' name='NURBS'/>
<meta name='title' content=' NurbsCurveExample.x3d '/>
<meta name='description' content='NurbsCurve exemplar showing controlPoint animation. Upper example has knot values explicitly defined, lower example has implicit knot values.'/>
<meta name='creator' content='Charles Adams, Vincent Marchetti, Don Brutzman'/>
<meta name='created' content='4 February 2003'/>
<meta name='modified' content='20 October 2019'/>
<meta name='MovingImage' content='videos/NurbsCurveExample.mov'/>
<meta name=' TODO ' content=' check NurbsCurve containerField handling and weight defaults '/>
<meta name='reference' content=' http://edocs.nps.edu/npspubs/scholarly/theses/2003/Jun/03Jun_Adams.pdf '/>
<meta name='subject' content='NURBS Curve Example'/>
<meta name='identifier' content=' https://www.web3d.org/x3d/content/examples/Basic/NURBS/NurbsCurveExample.x3d '/>
<meta name='generator' content='X3D-Edit 3.3, https://savage.nps.edu/X3D-Edit'/>
<meta name='license' content=' ../license.html'/>
</head>
<!--
to top <!-- Event Graph ROUTE Table shows event connections -->
 
<!-- Index for DEF nodes: ci, GridXY_20x20Fixed, GridXY_20x20Fixed_AdjustScale, LightBlueAppearance, LightGreenAppearance, np, NurbsCurveKnotted, NurbsCurveUnknotted, ts
Index for Viewpoint node: Viewpoint_1
-->
<Scene>
<WorldInfo title='NurbsCurveExample.x3d'/>
<Viewpoint description='NurbsCurve' position='12 7 18'/>
<Transform translation='0 5 0'>
<Shape>
<NurbsCurve DEF='NurbsCurveKnotted' knot='0 0 0 0 0.5 1 1 1 1' order='4' tessellation='30' weight='1 1 1 1 1' containerField='geometry'>
<!-- ROUTE information for np node:  [from ci.value_changed to set_point ] -->
 <Coordinate DEF='np' containerField='controlPoint' point='4 6 0 7 12 0 11 6 0 15 2 0 20 6 0'/>
</NurbsCurve>
<Appearance DEF='LightGreenAppearance'>
<Material diffuseColor='0.8 1 0.8' emissiveColor='0.8 1 0.8'/>
</Appearance>
</Shape>
<Transform translation='0 7 0'>
<Shape>
<Text string='"NurbsCurve with knots"'/>
<Appearance USE=' LightGreenAppearance'/>
</Shape>
</Transform>
</Transform>
<Shape>
<NurbsCurve DEF='NurbsCurveUnknotted' order='4' tessellation='30' containerField='geometry'>
<Coordinate USE=' np' containerField='controlPoint'/>
</NurbsCurve>
<Appearance DEF='LightBlueAppearance'>
<Material diffuseColor='0.8 0.8 1' emissiveColor='0.8 0.8 1'/>
</Appearance>
</Shape>
<Transform translation='0 7 0'>
<Shape>
<Text string='"NurbsCurve without knots"'/>
<Appearance USE=' LightBlueAppearance'/>
</Shape>
</Transform>
<!-- ROUTE information for ci node:  [from ts.fraction_changed to set_fraction ] [from value_changed to np.set_point ] -->
 <CoordinateInterpolator DEF='ci' key='0 .5 1' keyValue='4 6 0 7 12 0 11 6 0 15 2 0 20 6 0 4 6 0 7 0 0 11 6 0 15 10 0 20 6 0 4 6 0 7 12 0 11 6 0 15 2 0 20 6 0'/>

<!-- ROUTE information for ts node:  [from fraction_changed to ci.set_fraction ] -->
 <TimeSensor DEF='ts' cycleInterval='6' loop='true'/>

< ROUTE  fromNode=' ts' fromField='fraction_changed' toNode=' ci' toField='set_fraction'/>
< ROUTE  fromNode=' ci' fromField='value_changed' toNode=' np' toField='set_point'/>
<!-- Authoring hint -->
<Transform DEF='GridXY_20x20Fixed_AdjustScale' translation='12 7 0'>
<Inline DEF='GridXY_20x20Fixed'
  url=' GridXY_20x20Fixed.x3d"../../Savage/Tools/Authoring/GridXY_20x20Fixed.x3d" "https://savage.nps.edu/Savage/Tools/Authoring/GridXY_20x20Fixed.x3d" "GridXY_20x20Fixed.wrl" "../../Savage/Tools/Authoring/GridXY_20x20Fixed.wrl" "https://savage.nps.edu/Savage/Tools/Authoring/GridXY_20x20Fixed.wrl" ' />
</Transform>
</Scene>
</X3D>
<!--
to top <!-- Event Graph ROUTE Table shows event connections -->
 
<!-- Index for DEF nodes: ci, GridXY_20x20Fixed, GridXY_20x20Fixed_AdjustScale, LightBlueAppearance, LightGreenAppearance, np, NurbsCurveKnotted, NurbsCurveUnknotted, ts
Index for Viewpoint node: Viewpoint_1
-->

Event Graph ROUTE Table with 2 ROUTE connections total, showing X3D event-model relationships for this scene.

Each row shows an event cascade that may occur during a single timestamp interval between frame renderings, as part of the X3D execution model.

ts
TimeSensor
fraction_changed
SFFloat

ROUTE
event to
(1)
ci
CoordinateInterpolator
set_fraction
SFFloat
 
 
then 		ci
CoordinateInterpolator
value_changed
MFVec3f

ROUTE
event to
(2)
np
Coordinate
set_point
MFVec3f

-->

<!-- Online at
https://www.web3d.org/x3d/content/examples/Basic/NURBS/NurbsCurveExampleIndex.html -->
<!-- Version control at
https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/Basic/NURBS/NurbsCurveExample.x3d -->

<!-- Color legend: X3D terminology <X3dNode DEF='idName' field='value'/> matches XML terminology <XmlElement DEF='idName' attribute='value'/>
(Light-blue background: event-based behavior node or statement) (Grey background inside box: inserted documentation) (Magenta background: X3D Extensibility)
-->

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