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            "@name":"title",
            "@content":"Figure15.11ExtrudedPlaygroundSlide.x3d"
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          {
            "@name":"creator",
            "@content":"Figure 15.11, The VRML 2.0 Sourcebook, Copyright [1997] By Andrea L. Ames, David R. Nadeau, and John L. Moreland"
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            "@content":"http://www.wiley.com/legacy/compbooks/vrml2sbk/ch15/15fig11.htm"
          },
          {
            "@name":"translator",
            "@content":"Don Brutzman"
          },
          {
            "@name":"created",
            "@content":"20 August 2000"
          },
          {
            "@name":"modified",
            "@content":"14 January 2010"
          },
          {
            "@name":"description",
            "@content":"A playground slide built by extruding a half-circle cross section along a helical spine."
          },
          {
            "@name":"identifier",
            "@content":"http://www.web3d.org/x3d/content/examples/Vrml2Sourcebook/Chapter15-Extrusion/Figure15.11ExtrudedPlaygroundSlide.x3d"
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          {
            "@name":"license",
            "@content":"../../license.html"
          },
          {
            "@name":"translated",
            "@content":"19 March 2017"
          },
          {
            "@name":"generator",
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          {
            "#comment":"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."
          },
          {
            "#comment":"Authoring capabilities of Extrusion compared to IndexedFaceSet: can be more complicated to express, but also can provide great detail with much less effort."
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            "#comment":"First position and rotate viewpoint into positive-X-Y-Z octant using a Transform"
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