X3D Model Documentation: Switch.x3d

  1  <?xml version="1.0" encoding="UTF-8"?>
  2  <!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 3.3//EN" "https://www.web3d.org/specifications/x3d-3.3.dtd">
  3  <X3D profile='Interactive' version='3.3'  xmlns:xsd='http://www.w3.org/2001/XMLSchema-instance' xsd:noNamespaceSchemaLocation='https://www.web3d.org/specifications/x3d-3.3.xsd'>
  4       <head>
  5            <meta name='title' content='Switch.x3d'/>
  6            <meta name='description' content='Example for Switch node'/>
  7            <meta name='creator' content='Leonard Daly and Don Brutzman'/>
  8            <meta name='created' content='13 November 2005'/>
  9            <meta name='modified' content='20 October 2019'/>
 10            <meta name='reference' content='https://X3dGraphics.com'/>
 11            <meta name='reference' content='https://www.web3d.org/x3d/content/examples/X3dResources.html'/>
 12            <meta name='rights' content='Copyright (c) 2005, Daly Realism and Don Brutzman'/>
 13            <meta name='subject' content='X3D book, X3D graphics, X3D-Edit, http://www.x3dGraphics.com'/>
 14            <meta name='identifier' content='https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter03Grouping/Switch.x3d'/>
 15            <meta name='generator' content='X3D-Edit 3.3, https://savage.nps.edu/X3D-Edit'/>
 16            <meta name='license' content='../license.html'/>
 17       </head>
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Event Graph ROUTE Table shows event connections.
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<!-- to top Index for DEF nodes: AnimationGroup, BoxShape, ConeShape, Counter, CylinderShape, SphereShape, Switcher, Timer

Index for Viewpoint node: Viewpoint_1
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 18       <Scene>
 19            <WorldInfo title='Switch.x3d'/>
 20            <Background skyColor='1 1 1'/>
 21            <Viewpoint description='Switch among multiple children' orientation='-0.668 -0.724 -0.174 0.7' position='-1.93 1.78 3.28'/>
 22            <!-- Authors can manually change whichChoice values (from 0 through 3) to show each child shape -->
 23 
          <!-- ROUTE information for Switcher node:  [from Counter.value_changed to whichChoice ] -->
           <Switch DEF='Switcher' whichChoice='0'>
 24                 <Shape DEF='BoxShape'>
 25                      <Appearance>
 26                           <Material diffuseColor='1 0 0'/>
 27                      </Appearance>
 28                      <Box/>
 29                 </Shape>
 30                 <Shape DEF='ConeShape'>
 31                      <Appearance>
 32                           <Material diffuseColor='1 1 0'/>
 33                      </Appearance>
 34                      <Cone/>
 35                 </Shape>
 36                 <Shape DEF='CylinderShape'>
 37                      <Appearance>
 38                           <Material diffuseColor='0 1 0'/>
 39                      </Appearance>
 40                      <Cylinder/>
 41                 </Shape>
 42                 <Shape DEF='SphereShape'>
 43                      <Appearance>
 44                           <Material diffuseColor='0 0 1'/>
 45                      </Appearance>
 46                      <Sphere/>
 47                 </Shape>
 48            </Switch>
 49            <Group DEF='AnimationGroup'>
 50                 <!-- Total cycleInterval="8" gives 2 seconds to each of the 4 colors -->
 51                 <!-- Authors can set enabled='true' loop='true' for a continuous animation -->
 52 
               <!-- ROUTE information for Timer node:  [from fraction_changed to Counter.set_fraction ] -->
                <TimeSensor DEF='Timer' cycleInterval='8' enabled='false' loop='true'/>
 53 
               <!-- ROUTE information for Counter node:  [from Timer.fraction_changed to set_fraction ] [from value_changed to Switcher.whichChoice ] -->
                <IntegerSequencer DEF='Counter' key='0 .25 .5 .75 1' keyValue='0 1 2 3 0'/>
 54                 < ROUTE  fromNode='Timer' fromField='fraction_changed' toNode='Counter' toField='set_fraction'/>
 55                 < ROUTE  fromNode='Counter' fromField='value_changed' toNode='Switcher' toField='whichChoice'/>
 56            </Group>
 57       </Scene>
 58  </X3D>
<!--
<!--
Event Graph ROUTE Table shows event connections.
-->

<!-- to top Index for DEF nodes: AnimationGroup, BoxShape, ConeShape, Counter, CylinderShape, SphereShape, Switcher, Timer

Index for Viewpoint node: Viewpoint_1
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X3D Tooltips element index: Appearance, Background, Box, Cone, Cylinder, Group, head, IntegerSequencer, Material, meta, ROUTE, Scene, Shape, Sphere, Switch, TimeSensor, Viewpoint, WorldInfo, X3D, accessType and type, XML data types, field types

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.

Timer
TimeSensor
fraction_changed
SFFloat
→
ROUTE
event to
(1)
Counter
IntegerSequencer
set_fraction
SFFloat 		then
 
 
  		Counter
IntegerSequencer
value_changed
SFInt32
→
ROUTE
event to
(2)
Switcher
Switch
whichChoice
SFInt32
Additional guidance on X3D animation can be found in the 10-Step Animation Design Process and Event Tracing hint sheets. Have fun with X3D! 😀
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<!-- Online at
https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter03Grouping/SwitchIndex.html -->
<!-- Version control at
https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter03Grouping/Switch.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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