<?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='title' content=' HeadsUpDisplayPrototype.x3d '/>
<meta name='description' content='Reusable Prototype definition that applies a ProximitySensor for a simple HeadsUpDisplay (HUD) prototype that maintains a stable position for its children on the screen.'/>
<meta name='creator' content='Leonard Daly and Don Brutzman'/>
<meta name='created' content='15 July 2006'/>
<meta name='modified' content='20 October 2019'/>
<meta name='reference' content=' HeadsUpDisplayExample.x3d '/>
<meta name='reference' content=' https://X3dGraphics.com '/>
<meta name='reference' content=' https://www.web3d.org/x3d/content/examples/X3dResources.html '/>
<meta name='rights' content='Copyright 2006, Daly Realism and Don Brutzman'/>
<meta name='subject' content=' X3D book, X3D graphics, X3D-Edit, http://www.x3dGraphics.com '/>
<meta name='identifier' content=' https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter14Prototypes/HeadsUpDisplayPrototype.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: HereIAm, HudContainer
Index for Viewpoint node: Viewpoint_1
Index for ProtoDeclare definition: HeadsUpDisplay
-->
<Scene>
<WorldInfo title='HeadsUpDisplayPrototype.x3d'/>
<ProtoDeclare name='HeadsUpDisplay' appinfo='Heads-up display (HUD) keeps child geometry aligned on screen in a consistent location' >
<ProtoInterface>
<field name='screenOffset' type='SFVec3f' value='0 0 -5' accessType='inputOutput'
 appinfo='offset position for HUD relative to current view location, default 0 0 -5' />
<field name='children' type='MFNode' accessType='inputOutput'
 appinfo='X3D content positioned at HUD offset' >
<!-- initialization nodes (if any) go here -->
</field>
<field name='position_changed' type='SFVec3f' accessType='outputOnly'
 appinfo='HUD position update (in world coordinates) relative to original location' />
<field name='orientation_changed' type='SFRotation' accessType='outputOnly'
 appinfo='HUD orientation update relative to original location' />
</ProtoInterface>
<ProtoBody>
<Group>
<!-- ROUTE information for HudContainer node:  [from HereIAm.orientation_changed to rotation ] [from HereIAm.position_changed to translation ] -->
 <Transform DEF='HudContainer'>
<Transform>
<IS>
<connect nodeField='translation' protoField='screenOffset'/>
</IS>
<Group>
<IS>
<connect nodeField='children' protoField='children'/>
</IS>
</Group>
</Transform>
</Transform>
<!-- ROUTE information for HereIAm node:  [from orientation_changed to HudContainer.rotation ] [from position_changed to HudContainer.translation ] -->
 <ProximitySensor DEF='HereIAm' size='10000000 10000000 10000000'>
<IS>
<connect nodeField='position_changed' protoField='position_changed'/>
<connect nodeField='orientation_changed' protoField='orientation_changed'/>
</IS>
</ProximitySensor>
< ROUTE  fromNode=' HereIAm' fromField='orientation_changed' toNode=' HudContainer' toField='rotation'/>
< ROUTE  fromNode=' HereIAm' fromField='position_changed' toNode=' HudContainer' toField='translation'/>
</Group>
</ProtoBody>
</ProtoDeclare>
<Viewpoint description='Heads-up display (HUD)'/>
<!-- ProtoDeclare is the "cookie cutter"
template, ProtoInstance creates an actual occurrence -->
<!-- Example use is in separate scene -->
<Anchor description='HeadsUpDisplay Example' parameter='"target=_blank"'
  url=' HeadsUpDisplayExample.x3d"https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter14Prototypes/HeadsUpDisplayExample.x3d" "HeadsUpDisplayExample.wrl" "https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter14Prototypes/HeadsUpDisplayExample.wrl" ' >
<Shape>
<Appearance>
<Material diffuseColor='0.8 0.4 0'/>
</Appearance>
<Text string='"HeadsUpDisplayExample.x3d" "is a Prototype declaration file." "" "For an example scene using this node," "click this text and view" "HeadsUpDisplayExample.x3d"'>
<FontStyle justify='"MIDDLE" "MIDDLE"' size='0.8'/>
</Text>
</Shape>
</Anchor>
</Scene>
</X3D>
<!--
to top <!-- Event Graph ROUTE Table shows event connections -->
 
<!-- Index for DEF nodes: HereIAm, HudContainer
Index for Viewpoint node: Viewpoint_1
Index for ProtoDeclare definition: HeadsUpDisplay
-->

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.

HereIAm
ProximitySensor
orientation_changed
SFRotation

ROUTE
event to
(1)
HudContainer
Transform
rotation
SFRotation
HereIAm
ProximitySensor
position_changed
SFVec3f

ROUTE
event to
(1)
HudContainer
Transform
translation
SFVec3f

-->

<!-- Online at
https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter14Prototypes/HeadsUpDisplayPrototypeIndex.html -->
<!-- Version control at
https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter14Prototypes/HeadsUpDisplayPrototype.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)
    <ProtoDeclare name='ProtoName'> <field name='fieldName'/> </ProtoDeclare> -->

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