<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, long_steps, short_steps) {
- var cross_section = nt3d.circle(cross_section_radius, short_steps);
- var path = nt3d.circle(torus_radius, long_steps);
- var cross_section_normals = nt3d.rotate_about_origin(path, [0,0,1], Math.PI/2);
- var path_normals = [];
- path_normals.length = long_steps;
- for (var i = 0; i < long_steps; i++) {
- path_normals[i] = [0, 0, 1];
- }
- return nt3d.closed_extrude(cross_section, path, cross_section_normals, path_normals);
+ function torus_by_extrude(params) {
+ var path = nt3d.circle(params.torus_radius, params.long_steps);
+ path = nt3d.rotate_about_origin(path, [0,1,0], params.rotation * 2*Math.PI);
+ return nt3d.closed_extrude(
+ path,
+ nt3d.circle(params.cross_section_radius, params.short_steps),
+ nt3d.shapenormals_from_closed_path(path),
+ [0, 0, 1]);
}
- var params = [["Torus radus", 100],
- ["Cross section radius", 40],
- ["Steps around the long way", 50],
- ["Steps around the short way", 16]];
+ var params = [["torus_radius", 100],
+ ["cross_section_radius", 40],
+ ["rotation", 0.001, "Rotation (in turns)"],
+ ["long_steps", 50, "Steps around the long way"],
+ ["short_steps", 16, "Steps around the short way"]];
</script>
</head>
<body onload="nt3d.framework(torus_by_extrude, params)">
projects / nt3d / blobdiff