<?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 content='centersize.x3d' name='title'/>
    <meta content='centersize-movie.mpg' name='MovingImage'/>
    <meta content='http://www.nist.gov/vrml.html' name='reference'/>
    <meta content='http://www.itl.nist.gov/div897/ctg/vrml/vrml.html' name='reference'/>
    <meta content='http://www.itl.nist.gov/div897/ctg/vrml/members.html' name='creator'/>
    <meta content='This file was provided by the National Institute of Standards and Technology, and is part of the X3D Conformance Test Suite, available at http://www.nist.gov/vrml.html The information contained within this file is provided for use in establishing conformance to the ISO VRML97 Specification. Conformance to this test does not imply recommendation or endorsement by the National Institute of Standards and Technology (NIST). This software can be redistributed and/or modified freely provided that any derivative works bear some notice that they are derived from it, and any modified versions bear some notice that they have been modified.' name='disclaimer'/>
    <meta content='Interactive Conformance Testing for VRML, Mary Brady and Lynn Rosenthal, NIST, created 8 September 2010 and updated 25 August 2016, https://www.nist.gov/itl/ssd/information-systems-group/interactive-conformance-testing-vrml' name='reference'/>
    <meta content='Correct definition and compliance of this conformance scene is maintained by the X3D Working Group, https://www.web3d.org/working-groups/x3d' name='info'/>
    <meta content='Michael Kass NIST' name='creator'/>
    <meta content='Don Brutzman' name='translator'/>
    <meta content='21 January 2001' name='translated'/>
    <meta content='28 August 2023' name='modified'/>
    <meta content='Test the size field for a VisibilitySensor node. A Sphere geometry has an associated VisibilitySensor in front of it, at point 0 0 0. The default ViewPoint is at point 0 0 10, looking down the -Z axis. Because the bounding box, with dimensions 4 4 4 is in direct sight, an isActive event is generated by the enabled VisibilitySensor node, which is routed to enable a TimeSensor node, which starts a color animation of the Sphere. When the user moves to the second viewpoint, behing the bounding box, at point 0 0 -10, an isActive=false event is generated and the Sphere ceases to change color.' name='description'/>
    <meta content='https://www.web3d.org/x3d/content/examples/ConformanceNist/Sensors/VisibilitySensor/centersize.x3d' name='identifier'/>
    <meta content='Vrml97ToX3dNist, http://ovrt.nist.gov/v2_x3d.html' name='generator'/>
    <meta content='X3D-Edit 4.0, https://www.web3d.org/x3d/tools/X3D-Edit' name='generator'/>
    <meta content='../../license.html' name='license'/>
  </head>
  <Scene>
    <WorldInfo title='centersize.x3d'/>
    <NavigationInfo type='"EXAMINE" "WALK" "FLY" "ANY"'/>
    <Viewpoint description='Front View'/>
    <Viewpoint description='Inside VisibilitySensor' position='0 0 0'/>
    <Viewpoint description='Behind VisibilitySensor' position='0 0 -10'/>
    <TimeSensor DEF='TIME' cycleInterval='2' enabled='false' loop='true'/>
    <ColorInterpolator DEF='INTERP_COLOR' key='0 0.5 1' keyValue='1 0 0 0 1 0 0 0 1'/>
    <Group>
      <VisibilitySensor DEF='VISIB_SENSOR' size='4 4 4'/>
      <Shape>
        <Appearance>
          <Material emissiveColor='1 1 1'/>
        </Appearance>
        <IndexedLineSet coordIndex='0 1 -1 1 2 -1 2 3 -1 3 0 -1 4 5 -1 5 6 -1 6 7 -1 7 4 -1 1 5 -1 2 6 -1 0 4 -1 7 3 -1'>
          <Coordinate point='-2 -2 -2 2 -2 -2 2 2 -2 -2 2 -2 -2 -2 2 2 -2 2 2 2 2 -2 2 2'/>
        </IndexedLineSet>
      </Shape>
      <Transform DEF='GEOMETRY' translation='0 0 -20'>
        <Shape>
          <Appearance>
            <Material DEF='COLOR' diffuseColor='1 0 0'/>
          </Appearance>
          <Sphere radius='2'/>
        </Shape>
      </Transform>
    </Group>
    <ROUTE fromField='isActive' fromNode='VISIB_SENSOR' toField='enabled' toNode='TIME'/>
    <ROUTE fromField='fraction_changed' fromNode='TIME' toField='set_fraction' toNode='INTERP_COLOR'/>
    <ROUTE fromField='value_changed' fromNode='INTERP_COLOR' toField='set_diffuseColor' toNode='COLOR'/>
  </Scene>
</X3D>