<?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=' LODlevelChangedExample.x3d '/>
<meta name='description' content='Example use of (proposed) LOD level_changed outputOnly field to trigger loading of Inline nodes in subsequent levels.'/>
<meta name='creator' content='Don Brutzman'/>
<meta name='motivation' content='Chris Thorne'/>
<meta name='created' content='26 May 2004'/>
<meta name='modified' content='20 October 2019'/>
<meta name=' warning ' content=' under development, evaluating a proposed specification change '/>
<meta name='identifier' content=' https://www.web3d.org/x3d/content/examples/Basic/development/LODlevelChangedExample.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: activeLOD, InlineLevel1, InlineLevel2, PreloadActivationGroup, PreloadLevelsScript, ShapeLevel0, ViewpointGroup
Index for Viewpoint nodes: Viewpoint_1, Viewpoint_2, Viewpoint_3
-->
<Scene>
<WorldInfo title='LODlevelChangedExample.x3d'/>
<!-- ROUTE information for activeLOD node:  [from level_changed to PreloadLevelsScript.level_changed ] -->
 <LOD DEF='activeLOD' range='6 10'>
<Shape DEF='ShapeLevel0'>
<Text string='"developmental test scene" "LODlevelChangedExample"'>
<FontStyle justify='"MIDDLE" "MIDDLE"'/>
</Text>
</Shape>
<!-- ROUTE information for InlineLevel1 node:  [from PreloadLevelsScript.activateLevel1 to load ] -->
 <Inline DEF='InlineLevel1' load='false'/>

<!-- ROUTE information for InlineLevel2 node:  [from PreloadLevelsScript.activateLevel2 to load ] -->
 <Inline DEF='InlineLevel2' load='false'/>

<!-- etc. -->
</LOD>
<Group DEF='PreloadActivationGroup'>
<!-- ROUTE information for PreloadLevelsScript node:  [from activeLOD.level_changed to level_changed ] [from activateLevel1 to InlineLevel1.load ] [from activateLevel2 to InlineLevel2.load ] -->
 <Script DEF='PreloadLevelsScript'>
<field name='level_changed' type='SFInt32' accessType='inputOnly'/>
<field name='activateLevel1' type='SFBool' accessType='outputOnly'/>
<field name='activateLevel2' type='SFBool' accessType='outputOnly'/>
<![CDATA[ 
        
ecmascript:

function level_changed (value, timestamp)
{
	Browser.println ('level=' + value);
	if      (value == 1) activateLevel1 = true;
	else if (value == 2) activateLevel2 = true;
	// etc.
}
]]>
</Script>
< ROUTE  fromNode=' activeLOD' fromField='level_changed' toNode=' PreloadLevelsScript' toField='level_changed'/>
< ROUTE  fromNode=' PreloadLevelsScript' fromField='activateLevel1' toNode=' InlineLevel1' toField='load'/>
< ROUTE  fromNode=' PreloadLevelsScript' fromField='activateLevel2' toNode=' InlineLevel2' toField='load'/>
</Group>
<Group DEF='ViewpointGroup'>
<Viewpoint description='level 0' position='0 0 4'/>
<Viewpoint description='level 1' position='0 0 8'/>
<Viewpoint description='level 2' position='0 0 12'/>
</Group>
</Scene>
</X3D>
<!--
to top <!-- Event Graph ROUTE Table shows event connections -->
 
<!-- Index for DEF nodes: activeLOD, InlineLevel1, InlineLevel2, PreloadActivationGroup, PreloadLevelsScript, ShapeLevel0, ViewpointGroup
Index for Viewpoint nodes: Viewpoint_1, Viewpoint_2, Viewpoint_3
-->

Event Graph ROUTE Table with 3 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.

-->

<!-- Online at
https://www.web3d.org/x3d/content/examples/Basic/development/LODlevelChangedExampleIndex.html -->
<!-- Version control at
https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/content/examples/Basic/development/LODlevelChangedExample.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)
-->

to top <!-- For additional help information about X3D scenes, please see X3D Tooltips, X3D Resources, and X3D Scene Authoring Hints. -->