git.scottworley.com Git - nt3d/blob - torus_by_extrude.html

   1 <html>
   2   <head>
   3     <title>Torus by extrude</title>
   4     <script type="text/javascript" src="nt3d.js"></script>
   5     <script type="text/javascript">
   6       function torus_by_extrude(torus_radius, cross_section_radius, long_steps, short_steps) {
   7         var cross_section = nt3d.circle(cross_section_radius, short_steps);
   8         var path = nt3d.circle(torus_radius, long_steps);
   9         var cross_section_normals = nt3d.rotate_about_origin(path, [0,0,1], Math.PI/2);
  10         var path_normals = [];
  11         path_normals.length = long_steps;
  12         for (var i = 0; i < long_steps; i++) {
  13                 path_normals[i] = [0, 0, 1];
  14         }
  15         return nt3d.closed_extrude(cross_section, path, cross_section_normals, path_normals);
  16       }
  17       var params = [["Torus radus", 100],
  18                     ["Cross section radius", 40],
  19                     ["Steps around the long way", 50],
  20                     ["Steps around the short way", 16]];
  21     </script>
  22   </head>
  23   <body onload="nt3d.framework(torus_by_extrude, params)">
  24     <h1>Torus by extrude</h1>
  25     <p>Make a torus by extruding a circle.</p>
  26   </body>
  27 </html>