<?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 content='ExtrusionCrossSectionITSSPrototype.x3d' name='title'/>
    <meta content='Don Brutzman' name='creator'/>
    <meta content='Sungmin Kwon' name='creator'/>
    <meta content='23 October 2017' name='created'/>
    <meta content='14 July 2025' name='modified'/>
    <meta content='Shape prototype for Enclosing IndexedTriangleStripSet that also draws spine line plus oriented, scaled cross sections at each spine point.' name='description'/>
    <meta content='Utilize ExtrusionCrossSectionITSS ProtoInstance as if it is a Shape node (with containerField="children") rather than an Extrusion node (with containerField="geometry") under a Shape.' name='hint'/>
    <meta content='Multiple Extrusion property fields not yet supported.' name='TODO'/>
    <meta content='https://en.wikipedia.org/wiki/Extrusion' name='reference'/>
    <meta content='VRML 97 Specification, 6.18 Extrusion' name='reference'/>
    <meta content='https://www.web3d.org/technicalinfo/specifications/vrml97/part1/nodesRef.html#Extrusion' name='reference'/>
    <meta content='VRML 97 Specification, Figure 6.6' name='Image'/>
    <meta content='https://www.web3d.org/technicalinfo/specifications/vrml97/Images/Extrusion.gif' name='Image'/>
    <meta content='http://realism.com/x3d/examples/Extrusion/_frame.html' name='reference'/>
    <meta content='http://www.cs.brown.edu/~gss/vrml/drawpoly.html' name='reference'/>
    <meta content='ExtrusionXj3dGoldberg1999.java' name='reference'/>
    <meta content='http://web3d.metrolink.com/cgi-bin/cvsweb.cgi/x3d/src/com/sun/j3d/loaders/vrml97/impl/Attic/Extrusion.java' name='reference'/>
    <meta content='https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter06GeometryPointsLinesPolygons/ExtrusionCrossSectionITSSPrototype.x3d' name='identifier'/>
    <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='ExtrusionCrossSectionITSSPrototype.x3d'/>
    <ProtoDeclare appinfo='Shape prototype for Extrusion node that also draws spine line plus oriented scaled cross sections at each spine point' documentation='https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter06GeometryPointsLinesPolygons/ExtrusionCrossSectionPrototype.x3d' name='ExtrusionCrossSectionITSS'>
      <ProtoInterface>
        <field accessType='initializeOnly' appinfo='Extrusion name' name='name' type='SFString'/>
        <field accessType='initializeOnly' appinfo='Extrusion field' name='crossSection' type='MFVec2f' value='1 1 1 -1 -1 -1 -1 1 1 1'/>
        <field accessType='initializeOnly' appinfo='Extrusion field' name='spine' type='MFVec3f' value='0 0 0 0 1 0'/>
        <field accessType='initializeOnly' appinfo='Extrusion field' name='scale' type='MFVec2f' value='1 1'/>
        <field accessType='initializeOnly' appinfo='Extrusion field' name='orientation' type='MFRotation' value='0 0 1 0'/>
        <field accessType='initializeOnly' appinfo='Extrusion field' name='beginCap' type='SFBool' value='false'/>
        <field accessType='initializeOnly' appinfo='Extrusion field' name='endCap' type='SFBool' value='false'/>
        <field accessType='initializeOnly' appinfo='Extrusion field' name='ccw' type='SFBool' value='true'/>
        <field accessType='initializeOnly' appinfo='Extrusion field' name='convex' type='SFBool' value='true'/>
        <field accessType='initializeOnly' appinfo='Extrusion field' name='creaseAngle' type='SFFloat' value='0'/>
        <field accessType='initializeOnly' appinfo='Extrusion field' name='solid' type='SFBool' value='true'/>
        <field accessType='inputOutput' appinfo='emissiveColor of spine' name='spineColor' type='SFColor' value='0 0.9 0.8'/>
        <field accessType='inputOutput' appinfo='diffuseColor of crossSection' name='crossSectionColor' type='SFColor' value='0.2 0.8 0.3'/>
        <field accessType='inputOutput' appinfo='transparency of crossSection' name='crossSectionTransparency' type='SFFloat' value='0.2'/>
        <field accessType='inputOutput' appinfo='diffuseColor of extrusion hull' name='extrusionColor' type='SFColor' value='0.3 0.3 0.3'/>
        <field accessType='inputOutput' appinfo='transparency of extrusion hull' name='extrusionTransparency' type='SFFloat' value='0.7'/>
        <field accessType='initializeOnly' appinfo='Image to apply to Extrusion' name='extrusionImageTexture' type='SFNode'>
          <!-- initialization node (if any) goes here -->
        </field>
        <field accessType='initializeOnly' appinfo='TextureTransform coordinates of image applied to Extrusion' name='extrusionTextureTransform' type='SFNode'>
          <!-- initialization node (if any) goes here -->
        </field>
        <field accessType='inputOnly' appinfo='Extrusion field' name='set_crossSection' type='MFVec2f'/>
        <field accessType='inputOnly' appinfo='Extrusion field' name='set_spine' type='MFVec3f'/>
        <field accessType='inputOnly' appinfo='Extrusion field' name='set_scale' type='MFVec2f'/>
        <field accessType='inputOnly' appinfo='Extrusion field' name='set_orientation' type='MFRotation'/>
        <field accessType='initializeOnly' appinfo='Whether to provide initialization trace statements showing node construction' name='traceEnabled' type='SFBool' value='false'/>
      </ProtoInterface>
      <ProtoBody>
        <Group>
          <Shape DEF='Spine'>
            <IndexedLineSet DEF='SpineLine' colorPerVertex='false'>
              <Coordinate DEF='SpineCoordinates'>
                <IS>
                  <connect nodeField='point' protoField='spine'/>
                  <connect nodeField='set_point' protoField='set_spine'/>
                </IS>
              </Coordinate>
            </IndexedLineSet>
            <Appearance>
              <Material DEF='SpineMaterial'>
                <IS>
                  <connect nodeField='emissiveColor' protoField='spineColor'/>
                </IS>
              </Material>
            </Appearance>
          </Shape>
          <Shape DEF='InternalCrossSections'>
            <IndexedTriangleFanSet DEF='CrossSectionFaces' ccw='true' colorPerVertex='true' normalPerVertex='true' solid='false'>
              <Coordinate DEF='CrossSectionFacesCoordinates'/>
            </IndexedTriangleFanSet>
            <Appearance>
              <Material DEF='CrossSectionMaterial'>
                <IS>
                  <connect nodeField='diffuseColor' protoField='crossSectionColor'/>
                  <connect nodeField='transparency' protoField='crossSectionTransparency'/>
                </IS>
              </Material>
            </Appearance>
          </Shape>
          <Shape DEF='ExternalExtrusion2'>
            <Appearance DEF='ExtrusionAppearance2'>
              <IS>
                <connect nodeField='texture' protoField='extrusionImageTexture'/>
                <connect nodeField='textureTransform' protoField='extrusionTextureTransform'/>
              </IS>
              <Material DEF='ExtrusionMaterial2'>
                <IS>
                  <connect nodeField='diffuseColor' protoField='extrusionColor'/>
                  <connect nodeField='transparency' protoField='extrusionTransparency'/>
                </IS>
              </Material>
            </Appearance>
            <IndexedTriangleStripSet DEF='EnclosingExtrusion2' ccw='true' colorPerVertex='true' index='0 1 2' normalPerVertex='true' solid='true'>
              <Coordinate DEF='ExtrusionCoordinates2'/>
            </IndexedTriangleStripSet>
          </Shape>
          <!-- <Shape DEF='ExternalExtrusion'> <Extrusion DEF='EnclosingExtrusion' convex='false' solid='false'> <IS> <connect nodeField='crossSection' protoField='crossSection'/> <connect nodeField='spine' protoField='spine'/> <connect nodeField='scale' protoField='scale'/> <connect nodeField='orientation' protoField='orientation'/> <connect nodeField='set_crossSection' protoField='set_crossSection'/> <connect nodeField='set_spine' protoField='set_spine'/> <connect nodeField='set_scale' protoField='set_scale'/> <connect nodeField='set_orientation' protoField='set_orientation'/> <connect nodeField='beginCap' protoField='beginCap'/> <connect nodeField='endCap' protoField='endCap'/> <connect nodeField='ccw' protoField='ccw'/> <connect nodeField='convex' protoField='convex'/> <connect nodeField='creaseAngle' protoField='creaseAngle'/> <connect nodeField='solid' protoField='solid'/> </IS> </Extrusion> <Appearance DEF='ExtrusionAppearance'> <IS> <connect nodeField='texture' protoField='extrusionImageTexture'/> <connect nodeField='textureTransform' protoField='extrusionTextureTransform'/> </IS> <Material DEF='ExtrusionMaterial'> <IS> <connect nodeField='diffuseColor' protoField='extrusionColor'/> <connect nodeField='transparency' protoField='extrusionTransparency'/> </IS> </Material> </Appearance> </Shape> -->
        </Group>
        <!-- TODO hardwired local Script path to workaround BS Contact bug -->
        <Script DEF='CrossSectionScript' url='"ExtrusionCrossSectionITSSPrototype.js" "https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter06GeometryPointsLinesPolygons/ExtrusionCrossSectionITSSPrototype.js"'>
          <field accessType='initializeOnly' name='name' type='SFString'/>
          <field accessType='initializeOnly' name='crossSection' type='MFVec2f'/>
          <field accessType='initializeOnly' name='spine' type='MFVec3f'/>
          <field accessType='initializeOnly' name='scale' type='MFVec2f'/>
          <field accessType='initializeOnly' name='orientation' type='MFRotation'/>
          <field accessType='inputOutput' name='spineColor' type='SFColor'/>
          <field accessType='inputOutput' name='crossSectionColor' type='SFColor'/>
          <field accessType='inputOutput' name='crossSectionTransparency' type='SFFloat'/>
          <field accessType='inputOutput' name='extrusionColor' type='SFColor'/>
          <field accessType='inputOutput' name='extrusionTransparency' type='SFFloat'/>
          <field accessType='inputOnly' name='set_crossSection' type='MFVec2f'/>
          <field accessType='inputOnly' name='set_spine' type='MFVec3f'/>
          <field accessType='inputOnly' name='set_scale' type='MFVec2f'/>
          <field accessType='inputOnly' name='set_orientation' type='MFRotation'/>
          <field accessType='outputOnly' name='spineIndex' type='MFInt32'/>
          <field accessType='outputOnly' name='facesIndex' type='MFInt32'/>
          <field accessType='outputOnly' name='facePoints' type='MFVec3f'/>
          <field accessType='outputOnly' name='triStripIndex' type='MFInt32'/>
          <field accessType='initializeOnly' name='traceEnabled' type='SFBool'/>
          <!-- local variables -->
          <field accessType='initializeOnly' name='computedFacesIndex' type='MFInt32'/>
          <field accessType='initializeOnly' name='computedFacePoints' type='MFVec3f'/>
          <field accessType='initializeOnly' name='computedTriStripIndex' type='MFInt32'/>
          <IS>
            <connect nodeField='name' protoField='name'/>
            <connect nodeField='crossSection' protoField='crossSection'/>
            <connect nodeField='spine' protoField='spine'/>
            <connect nodeField='scale' protoField='scale'/>
            <connect nodeField='spineColor' protoField='spineColor'/>
            <connect nodeField='crossSectionColor' protoField='crossSectionColor'/>
            <connect nodeField='crossSectionTransparency' protoField='crossSectionTransparency'/>
            <connect nodeField='extrusionColor' protoField='extrusionColor'/>
            <connect nodeField='extrusionTransparency' protoField='extrusionTransparency'/>
            <connect nodeField='orientation' protoField='orientation'/>
            <connect nodeField='set_crossSection' protoField='set_crossSection'/>
            <connect nodeField='set_spine' protoField='set_spine'/>
            <connect nodeField='set_scale' protoField='set_scale'/>
            <connect nodeField='set_orientation' protoField='set_orientation'/>
            <connect nodeField='traceEnabled' protoField='traceEnabled'/>
          </IS>
        </Script>
        <ROUTE fromField='spineIndex' fromNode='CrossSectionScript' toField='set_coordIndex' toNode='SpineLine'/>
        <ROUTE fromField='facesIndex' fromNode='CrossSectionScript' toField='set_index' toNode='CrossSectionFaces'/>
        <ROUTE fromField='facePoints' fromNode='CrossSectionScript' toField='point' toNode='CrossSectionFacesCoordinates'/>
        <ROUTE fromField='triStripIndex' fromNode='CrossSectionScript' toField='set_index' toNode='EnclosingExtrusion2'/>
        <Group>
          <!-- ======= ROUTE Trace ============================================== -->
          <Script DEF='Trace_ROUTE_CrossSectionScript_triStripIndex_TO_EnclosingExtrusion2_set_index' mustEvaluate='true'>
            <!-- Trace ROUTEd event values on X3D browser console -->
            <field accessType='initializeOnly' appinfo='Sampling frequency in seconds (0 means all values)' name='reportInterval' type='SFTime' value='1.0'/>
            <field accessType='inputOnly' name='traceValue' type='MFInt32'/>
            <field accessType='initializeOnly' name='timeStampPreviousReport' type='SFTime' value='-1'/>
            <![CDATA[
ecmascript:
    function traceValue (eventValue, timeStamp) {
      // input eventValue received for trace field
      if (timeStamp - timeStampPreviousReport >= reportInterval) {
        Browser.println ('Trace_ROUTE_CrossSectionScript_triStripIndex_TO_EnclosingExtrusion2_set_index type=MFInt32 value=' + eventValue.toString());
        timeStampPreviousReport = timeStamp;
      }
    }
    function timeOfDay (someTime) {
      hh = Math.floor (someTime /(60*60)) % 24;
      mm = Math.floor (someTime / 60)     % 60;
      ss = Math.floor (someTime)          % 60;
      if (hh < 9) hour   = '0' + hh;
      else        hour   =       hh;
      if (mm < 9) minute = '0' + mm;
      else        minute =       mm;
      if (ss < 9) second = '0' + ss;
      else        second =       ss;
      return '(' + hour + ':' + minute + ':' + second + ' GMT)';
    }
]]>
          </Script>
          <ROUTE fromField='triStripIndex' fromNode='CrossSectionScript' toField='traceValue' toNode='Trace_ROUTE_CrossSectionScript_triStripIndex_TO_EnclosingExtrusion2_set_index'/>
          <!-- ======= ROUTE Trace block complete ===================================================== -->
        </Group>
        <ROUTE fromField='facePoints' fromNode='CrossSectionScript' toField='point' toNode='ExtrusionCoordinates2'/>
        <!-- -->
      </ProtoBody>
    </ProtoDeclare>
    <!-- ==================== -->
    <!-- Example instance adapted from Figure15.12Torus.x3d -->
    <!-- https://www.web3d.org/x3d/content/examples/Basic/Vrml2Sourcebook/Chapter15-Extrusion/Figure15.12Torus.x3d -->
    <!-- Redirection text in case a user examines this PROTO file via a 3D browser: -->
    <Group>
      <Transform translation='0 0.5 0'>
        <Shape>
          <Appearance>
            <Material diffuseColor='0 1 1' emissiveColor='0 1 1'/>
          </Appearance>
          <Text string='"ExtrusionCrossSectionITSS" "is a Prototype definition scene"'>
            <FontStyle justify='"MIDDLE" "MIDDLE"' size='0.7'/>
          </Text>
        </Shape>
      </Transform>
    </Group>
  </Scene>
</X3D>