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+#VRML V2.0 utf8
+# X3D-to-VRML-97 XSL translation autogenerated by X3dToVrml97.xslt
+# http://www.web3d.org/x3d/content/X3dToVrml97.xslt
+# Generated using XSLT processor: SAXON 9.1.0.2 from Saxonica
+
+# [X3D] VRML V3.0 utf8
+# PROFILE Immersive
+# [X3D] version=3.0
+# [X3D] noNamespaceSchemaLocation=http://www.web3d.org/specifications/x3d-3.0.xsd
+# [head]
+
+# META "title" "Figure15.15TwistedBar.x3d"
+# META "creator" "Figure 15.15, The VRML 2.0 Sourcebook, Copyright [1997] By Andrea L. Ames, David R. Nadeau, and John L. Moreland"
+# META "reference" "http://www.wiley.com/legacy/compbooks/vrml2sbk/ch15/15fig15.htm"
+# META "translator" "Don Brutzman"
+# META "created" "20 August 2000"
+# META "modified" "14 January 2010"
+# META "description" "A bar twisted using Y-axis, cross-section rotation at each spine coordinate."
+# META "identifier" "http://www.web3d.org/x3d/content/examples/Vrml2Sourcebook/Chapter15-Extrusion/Figure15.15TwistedBar.x3d"
+# META "generator" "X3D-Edit 3.3, https://savage.nps.edu/X3D-Edit"
+# META "license" "../../license.html"
+
+# [Scene] ========== ========== ==========
+
+NavigationInfo { type [ "EXAMINE" "ANY" ] } ###  Default X3D NavigationInfo
+
+# Computational cost of Extrusion compared to IndexedFaceSet: quicker to download, takes time to calculate polygonal faces and normals during initial loading, equally fast at run time.
+# Authoring capabilities of Extrusion compared to IndexedFaceSet: can be more complicated to express, but also can provide great detail with much less effort.
+# First position and rotate viewpoint into positive-X-Y-Z octant using a Transform
+Transform {
+  rotation 0 1 0 0.758
+  translation 10 5 10
+  children [
+      Viewpoint {
+        description "Twisted bar using extrusion orientations"
+        orientation 1 0 0 -0.3
+        position 0 0 0
+      }
+  ]
+}
+Shape {
+  appearance Appearance {
+    material Material {
+      diffuseColor 1 0.5 0
+    }
+  }
+  geometry Extrusion {
+    creaseAngle 0.785
+    crossSection [ -1 1 1 1 1 -1 -1 -1 -1 1 ]
+    orientation [ 0 1 0 0 0 1 0 0.175 0 1 0 0.349 0 1 0 0.524 0 1 0 0.698 0 1 0 0.873 0 1 0 1.047 0 1 0 1.222 0 1 0 1.396 ]
+    spine [ 0 0.0 0 0 0.5 0 0 1.0 0 0 1.5 0 0 2.0 0 0 2.5 0 0 3.0 0 0 3.5 0 0 4.0 0 ]
+  }
+}