<?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>
<meta name='title' content=' PhysicalUnitRepresentationPrototypes.x3d '/>
<meta name='description' content='Prototypes to demonstrate functionality for Real-Length Representation nodes.'/>
<meta name=' warning ' content=' under development '/>
<meta name='creator' content='Don Brutzman'/>
<meta name='created' content='22 July 2007'/>
<meta name='modified' content='20 October 2019'/>
<meta name='reference' content='Myeon Won Lee and Sun-Young Cho, "Real Length Representation for Virtual Objects," point paper, University of Suwon, Korea, June 2007.'/>
<meta name='subject' content='X3D scaling and metadata convenience nodes'/>
<meta name='identifier' content=' https://www.web3d.org/x3d/content/examples/Basic/development/PhysicalUnitRepresentationPrototypes.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: MyZeptoScale, ZeptoScale
Index for ProtoDeclare definition: ZeptoScale
-->
<Scene>
<!-- ==================== -->
<!-- Initial approach: direct scaling -->
<WorldInfo title='PhysicalUnitRepresentationPrototypes.x3d'/>
<Transform DEF='MyZeptoScale' scale='1.0E-10 1.0E-10 1.0E-10'>
<Transform scale='1.0E-11 1.0E-11 1.0E-11'>
<MetadataString name='lengthUnit' value='"ZEPTO meters"'/>
<!-- scaled content goes here -->
<Shape>
<Box/>
</Shape>
</Transform>
</Transform>
<!-- ==================== -->
<!-- Second approach: prototype nodes for scaling -->
<!-- ==================== -->
<ProtoDeclare name='ZeptoScale' appinfo='ZeptoScale applies a uniform scale factor of 10^-21 to all children' >
<ProtoInterface>
<field name='children' type='MFNode' accessType='inputOutput'>
<!-- initialization: NULL node -->
</field>
<!-- TODO: can add other fields for Transform node here to ensure completeness -->
</ProtoInterface>
<ProtoBody>
<Transform DEF='ZeptoScale' scale='1.0E-10 1.0E-10 1.0E-10'>
<Transform scale='1.0E-11 1.0E-11 1.0E-11'>
<IS>
<connect nodeField='children' protoField='children'/>
</IS>
</Transform>
</Transform>
</ProtoBody>
</ProtoDeclare>
<!-- ==================== -->
<!-- Example use of prototype: the following should be very very small... -->
<ProtoInstance name='ZeptoScale'>
<fieldValue name='children'>
<Shape>
<Sphere/>
</Shape>
</fieldValue>
</ProtoInstance>
<!-- ==================== -->
<Background groundColor='0.25 0.25 0.25' skyColor='0.25 0.25 0.25'/>
</Scene>
</X3D>
<!--
to top <!-- Event Graph ROUTE Table shows event connections -->
 
<!-- Index for DEF nodes: MyZeptoScale, ZeptoScale
Index for ProtoDeclare definition: ZeptoScale
-->

Event Graph ROUTE Table with 0 ROUTE 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.


ProtoInstance
ZeptoScale 		No ROUTE connection found for output from this node.
Contains SFNode/MFNode field with indirect access to other nodes. 

-->

<!-- Online at
https://www.web3d.org/x3d/content/examples/Basic/development/PhysicalUnitRepresentationPrototypesIndex.html -->
<!-- Version control at
https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/Basic/development/PhysicalUnitRepresentationPrototypes.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)
    <ProtoInstance name='ProtoName'> <field name='fieldName'/> </ProtoInstance> -->

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