{ "X3D": {
    "encoding":"UTF-8",
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    "@xsd:noNamespaceSchemaLocation":"https://www.web3d.org/specifications/x3d-3.3.xsd",
    "JSON schema":"https://www.web3d.org/specifications/x3d-4.0-JSONSchema.autogenerated.json",
    "head": {
        "meta": [
          {
            "@name":"title",
            "@content":"Tetrahedron.x3d"
          },
          {
            "@name":"description",
            "@content":"Tetrahedron is an 4-sided triangular pyramid with 4 vertices, 4 triangular faces and 6 edges. A regular tetrahedron is a polyhedron assembled from equilateral triangles and is a Platonic solid. Tetrahedron is the simplest of all the ordinary convex polyhedra and the only one that has fewer than 5 faces."
          },
          {
            "@name":"created",
            "@content":"27 September 2014"
          },
          {
            "@name":"modified",
            "@content":"3 September 2025"
          },
          {
            "@name":"creator",
            "@content":"Don Brutzman"
          },
          {
            "@name":"reference",
            "@content":"Tetrahedron.ply"
          },
          {
            "@name":"reference",
            "@content":"https://en.wikipedia.org/wiki/Tetrahedron"
          },
          {
            "@name":"reference",
            "@content":"https://en.wiktionary.org/wiki/tetrahedron"
          },
          {
            "@name":"reference",
            "@content":"https://en.wikipedia.org/wiki/Platonic_solid"
          },
          {
            "@name":"reference",
            "@content":"https://en.wikipedia.org/wiki/Pyramid_(geometry)"
          },
          {
            "@name":"reference",
            "@content":"http://polyhedra.org/poly/show/0/tetrahedron"
          },
          {
            "@name":"reference",
            "@content":"http://www.mathsisfun.com/geometry/tetrahedron.html"
          },
          {
            "@name":"reference",
            "@content":"http://www.kjmaclean.com/Geometry/Tetrahedron.html"
          },
          {
            "@name":"reference",
            "@content":"http://www.georgehart.com/virtual-polyhedra/vp.html"
          },
          {
            "@name":"reference",
            "@content":"http://www.georgehart.com/virtual-polyhedra/vrml/tetrahedron.wrl"
          },
          {
            "@name":"identifier",
            "@content":"https://www.web3d.org/x3d/content/examples/X3dForAdvancedModeling/GeometricShapes/Tetrahedron.x3d"
          },
          {
            "@name":"generator",
            "@content":"Meshlab X3D Exported, http://meshlab.sourceforge.net"
          },
          {
            "@name":"generator",
            "@content":"X3D-Edit 4.0, https://www.web3d.org/x3d/tools/X3D-Edit"
          },
          {
            "@name":"license",
            "@content":"../license.html"
          },
          {
            "@name":"translated",
            "@content":"16 April 2026"
          },
          {
            "@name":"generator",
            "@content":"X3dToJson.xslt, https://www.web3d.org/x3d/stylesheets/X3dToJson.html"
          },
          {
            "@name":"reference",
            "@content":"X3D JSON encoding: https://www.web3d.org/wiki/index.php/X3D_JSON_Encoding"
          }
        ]
    },
    "Scene": {
        "-children":[
          { "WorldInfo":
            {
              "@title":"Tetrahedron.x3d"
            }
          },
          { "Background":
            {
              "@skyColor":[0.5,1,0.9]
            }
          },
          { "Viewpoint":
            {
              "@description":"Tetrahedron from Z axis",
              "@position":[0,0,6]
            }
          },
          { "Viewpoint":
            {
              "@description":"Tetrahedron from X axis",
              "@orientation":[0,1,0,1.570796],
              "@position":[6,0,0]
            }
          },
          { "Viewpoint":
            {
              "@description":"Tetrahedron from above",
              "@orientation":[1,0,0,-1.570796],
              "@position":[0,6,0]
            }
          },
          { "Shape":
            {
              "@DEF":"Tetrahedron",
              "-geometry":
                { "IndexedFaceSet":
                  {
                    "@coordIndex":[0,1,2,-1,0,2,3,-1,0,3,1,-1,3,2,1,-1],
                    "@solid":false,
                    "-coord":
                      { "Coordinate":
                        {
                          "@point":[1,1,1,-1,1,-1,-1,-1,1,1,-1,-1]
                        }
                      }
                  }
                },
              "-appearance":
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                    "-material":
                      { "Material":
                        {
                          "@diffuseColor":[0.2,0.5,0.8]
                        }
                      }
                  }
                }
            }
          },
          {
            "#comment":"Authoring hint #1: add a semitransparent Shape with a unit Sphere here to see relative Tetrahedron size"
          },
          {
            "#comment":"Authoring hint #2: these axes are aligned within local coordinate system, be sure to set X3D profile='Immersive' if uncommented and activated"
          },
          { "Transform":
            {
              "@DEF":"CoordinateAxesAdjustedScale",
              "@scale":[2,2,2],
              "-children":[
                {
                  "#comment":"<Inline DEF='CoordinateAxes' url='\"../../X3dForWebAuthors/Chapter03Grouping/CoordinateAxes.x3d\" \"https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter03Grouping/CoordinateAxes.x3d\" \"../../X3dForWebAuthors/Chapter03Grouping/CoordinateAxes.wrl\" \"https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter03Grouping/CoordinateAxes.wrl\" \"https://www.web3d.org/x3d/content/examples/Savage/Tools/Authoring/CoordinateAxes.x3d\" \"https://www.web3d.org/x3d/content/examples/Savage/Tools/Authoring/CoordinateAxes.wrl\"'/>"
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              ]
            }
          }
        ]
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}