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, rotation, long_steps, short_steps) {
   7         var path = nt3d.circle(torus_radius, long_steps);
   8         path = nt3d.rotate_about_origin(path, [0,1,0], rotation * 2*Math.PI);
   9         return nt3d.closed_extrude(
  10           path,
  11           nt3d.circle(cross_section_radius, short_steps),
  12           nt3d.shapenormals_from_closed_path(path),
  13           [0, 0, 1]);
  14       }
  15       var params = [["Torus radus", 100],
  16                     ["Cross section radius", 40],
  17                     ["Rotation (turns)", 0.001],
  18                     ["Steps around the long way", 50],
  19                     ["Steps around the short way", 16]];
  20     </script>
  21   </head>
  22   <body onload="nt3d.framework(torus_by_extrude, params)">
  23     <h1>Torus by extrude</h1>
  24     <p>Make a torus by extruding a circle.</p>
  25   </body>
  26 </html>