<html>
<head>
<title>Torus by extrude</title>
<script type="text/javascript" src="nt3d.js"></script>
<script type="text/javascript">
function torus_by_extrude(torus_radius, cross_section_radius, rotation, long_steps, short_steps) {
var path = nt3d.circle(torus_radius, long_steps);
path = nt3d.rotate_about_origin(path, [0,1,0], rotation * 2*Math.PI);
return nt3d.closed_extrude(
path,
nt3d.circle(cross_section_radius, short_steps),
nt3d.shapenormals_from_closed_path(path),
[0, 0, 1]);
}
var params = [["Torus radus", 100],
["Cross section radius", 40],
["Rotation (turns)", 0.001],
["Steps around the long way", 50],
["Steps around the short way", 16]];
</script>
</head>
<body onload="nt3d.framework(torus_by_extrude, params)">
<h1>Torus by extrude</h1>
<p>Make a torus by extruding a circle.</p>
</body>
</html>