Widening

[nt3d] / torus_by_extrude.html
diff --git a/torus_by_extrude.html b/torus_by_extrude.html

index 323ad1472d006161824fc71a4949b227e8dccf8f..ef323a95a5d38ecd239a1f61d8becf2480da494c 100644 (file)
--- a/torus_by_extrude.html
+++ b/torus_by_extrude.html
@@ -3,21 +3,20 @@
      <title>Torus by extrude</title>
      <script type="text/javascript" src="nt3d.js"></script>
      <script type="text/javascript">
      <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)">
      </script>
    </head>
    <body onload="nt3d.framework(torus_by_extrude, params)">