<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 3.3//EN" "https://www.web3d.org/specifications/x3d-3.3.dtd">
<X3D profile='Immersive'  version='3.3 xmlns:xsd='http://www.w3.org/2001/XMLSchema-instance' xsd:noNamespaceSchemaLocation =' https://www.web3d.org/specifications/x3d-3.3.xsd ' >
<head>
<meta name='titlecontent='Snake.x3d'/>
<meta name='descriptioncontent='This world creates a morphing snake using an Extrusion node. To make the snake move, a CoordinateInterpolator sends the Extrusion node a series of new spines.'/>
<meta name='creatorcontent='David R. Nadeau'/>
<meta name='translatorcontent='Don Brutzman'/>
<meta name='createdcontent='1 July 1998'/>
<meta name='translatedcontent='2 February 2014'/>
<meta name='modifiedcontent='20 October 2019'/>
<meta name='referencecontent='originals/snake.wrl'/>
<meta name='referencecontent=' http://www.siggraph.org/s98 '/>
<meta name='referencecontent=' http://www.siggraph.org/s98/conference/courses/18.html '/>
<meta name='referencecontent=' http://www.sdsc.edu/~moreland/courses/Siggraph98/vrml97/slides/mt0258.htm '/>
<meta name='referencecontent=' http://www.sdsc.edu/~moreland/courses/Siggraph98/vrml97/vrml97.htm '/>
<meta name='referencecontent=' https://www.web3d.org/x3d/content/examples/X3dResources.html '/>
<meta name='identifiercontent=' https://www.web3d.org/x3d/content/examples/Vrml2Sourcebook/Siggraph98Course/Snake.x3d '/>
<meta name='generatorcontent='Vrml97ToX3dNist, http://ovrt.nist.gov/v2_x3d.html'/>
<meta name='generatorcontent='X3D-Edit, https://savage.nps.edu/X3D-Edit'/>
<meta name='licensecontent=' ../license.html'/>
</head>
<!--

to top <!-- Event Graph ROUTE Table shows event connections -->
 
<!-- Index for DEF nodes: Clock, Snake, SnakeWiggle

Index for Viewpoint node: Viewpoint_1
-->
<Scene>
<WorldInfo info='"Copyright (c) 1998, David R. Nadeau"title='Morphing snake'/>
<Viewpoint description='Entry vieworientation='1.0 0.0 0.0 -0.785position='0.0 6.0 6.0'/>
<NavigationInfo/>
<Shape>
<Appearance>
<Material diffuseColor='0.4 0.2 0.0'/>
</Appearance>
<Box size='30.0 0.01 30.0'/>
</Shape>
<Transform translation='0.0 0.3 0.0'>
<Shape>
<Appearance>
<Material diffuseColor='0.0 1.0 0.2shininess='0.05specularColor='0.9 0.9 0.0'/>
</Appearance>
<!-- ROUTE information for Snake node:  [from SnakeWiggle.value_changed to set_spine ] -->
<Extrusion DEF='SnakecreaseAngle='1.57crossSection='1.0 0.0 0.92 -0.38 0.71 -0.71 0.38 -0.92 0.0 -1.0 -0.38 -0.92 -0.71 -0.71 -0.92 -0.38 -1.0 -0.0 -0.92 0.38 -0.71 0.71 -0.38 0.92 0.0 1.0 0.38 0.92 0.71 0.71 0.92 0.38 1.0 0.0scale='0.05 0.05 0.3 0.1 0.5 0.15 0.25 0.25 0.25 0.25 0.28 0.28 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.29 0.29 0.29 0.29 0.29 0.29 0.28 0.28 0.23 0.23 0.17 0.17 0.12 0.12 0.08 0.08 0.05 0.05spine='-5.1 0.0 1.0 -4.83 0.0 1.0 -4.55 0.0 1.0 -4.28 0.0 1.0 -4.0 0.0 1.0 -3.72 0.0 0.91 -3.45 0.0 0.65 -3.17 0.0 0.27 -2.9 0.0 -0.16 -2.62 0.0 -0.56 -2.34 0.0 -0.86 -2.07 0.0 -0.99 -1.79 0.0 -0.95 -1.52 0.0 -0.73 -1.24 0.0 -0.37 -0.97 0.0 0.05 -0.69 0.0 0.47 -0.41 0.0 0.79 -0.14 0.0 0.98 0.14 0.0 0.98 0.41 0.0 0.8 0.69 0.0 0.47 0.97 0.0 0.06 1.24 0.0 -0.37 1.52 0.0 -0.72 1.79 0.0 -0.95 2.07 0.0 -0.99 2.34 0.0 -0.86 2.62 0.0 -0.57 2.9 0.0 -0.17 3.17 0.0 0.26 3.45 0.0 0.64 3.72 0.0 0.9 4.0 0.0 1.0'/>
</Shape>
</Transform>
<!-- ROUTE information for Clock node:  [from fraction_changed to SnakeWiggle.set_fraction ] -->
<TimeSensor DEF='ClockcycleInterval='4.0loop='true'/>

<!-- ROUTE information for SnakeWiggle node:  [from Clock.fraction_changed to set_fraction ] [from value_changed to Snake.set_spine ] -->
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-0.69 0.0 0.31 -0.41 0.0 0.67 -0.14 0.0 0.91 0.14 0.0 1.0 0.41 0.0 0.91 0.69 0.0 0.67 0.97 0.0 0.31 1.24 0.0 -0.1 1.52 0.0 -0.5 1.79 0.0 -0.81 2.07 0.0 -0.98 2.34 0.0 -0.98 2.62 0.0 -0.81 2.9 0.0 -0.5 3.17 0.0 -0.11 3.45 0.0 0.31 3.72 0.0 0.67 4.0 0.0 0.91 4.28 0.0 1.0'/>

< ROUTE  fromNode=' Clock' fromField='fraction_changed' toNode=' SnakeWiggle' toField='set_fraction'/>
< ROUTE  fromNode=' SnakeWiggle' fromField='value_changed' toNode=' Snake' toField='set_spine'/>
</Scene>
</X3D>
<!--

to top <!-- Event Graph ROUTE Table shows event connections -->
 
<!-- Index for DEF nodes: Clock, Snake, SnakeWiggle

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.

Clock
TimeSensor
fraction_changed
SFFloat

ROUTE
event to
(1)
SnakeWiggle
CoordinateInterpolator
set_fraction
SFFloat

 
 
then
SnakeWiggle
CoordinateInterpolator
value_changed
MFVec3f

ROUTE
event to
(2)
Snake
Extrusion
set_spine
MFVec3f


-->

<!-- Online at
https://www.web3d.org/x3d/content/examples/Vrml2Sourcebook/Siggraph98Course/SnakeIndex.html -->
<!-- Version control at
https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/Vrml2Sourcebook/Siggraph98Course/Snake.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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