[nt3d] / medusa.html

<html>
  <head>
    <title>Medusa</title>
    <script type="text/javascript" src="nt3d.js"></script>
    <script type="text/javascript">
      function finger(params, finger_crosssection, ring_num, ring_radius, finger_angle) {
        var path = [];
        var twirl_amplitute = Math.cos((ring_num * 2 * Math.PI) / params.finger_twirl_period);
        var twirl_angle = twirl_amplitute * params.finger_twirl_distance / (ring_radius * 2 * Math.PI);
        for (var finger_point = 0; finger_point <= params.finger_points; finger_point++) {
          var angle = (finger_angle + twirl_angle * finger_point / params.finger_points) * 2 * Math.PI;
          var x = ring_radius * Math.cos(angle);
          var y = ring_radius * Math.sin(angle);
          path.push([x, y, params.finger_height * finger_point / params.finger_points]);
        }
        return nt3d.extrude(path, finger_crosssection, [0, 0, 1], nt3d.pathnormals_from_point(path, [0, 0, 0]));
      }
      function medusa(params) {
        var finger_crosssection = nt3d.circle(params.finger_radius, params.finger_faces);
        var fingers = [];
        for (var ring_num = 0; ring_num < params.num_rings; ring_num++) {
          var ring_radius = params.first_ring_radius + ring_num * params.ring_spacing;
          var num_fingers = Math.round((ring_radius * 2 * Math.PI) / params.finger_spacing);
          for (var finger_num = 0; finger_num < num_fingers; finger_num++) {
            var finger_angle = finger_num / num_fingers;
            fingers = fingers.concat(finger(params, finger_crosssection, ring_num, ring_radius, finger_angle));
          }
        }

        return fingers;
      }
      var params = [["first_ring_radius", 20],
                    ["num_rings", 4],
                    ["ring_spacing", 10, "Space Between Rings"],
                    ["finger_spacing", 10],
                    ["finger_radius", 3],
                    ["finger_faces", 3],
                    ["finger_points", 20],
                    ["finger_twirl_distance", 50],
                    ["finger_twirl_period", 2, "Finger Twirl Period (1=same, 2=alternating)"],
                    ["finger_height", 100]];
    </script>
  </head>
  <body onload="nt3d.framework(medusa, params)">
    <h1>Medusa</h1>
    <p>An artsy thing.</p>
  </body>
</html>
Commit	Line	Data
00406c26 SW	1	<html>
	2	<head>
	3	<title>Medusa</title>
	4	<script type="text/javascript" src="nt3d.js"></script>
	5	<script type="text/javascript">
b62906a2	6	function finger(params, finger_crosssection, ring_num, ring_radius, finger_angle) {
9c6ce9fa	7	var path = [];
b62906a2 SW	8	var twirl_amplitute = Math.cos((ring_num * 2 * Math.PI) / params.finger_twirl_period);
b62906a2 SW	9	var twirl_angle = twirl_amplitute * params.finger_twirl_distance / (ring_radius * 2 * Math.PI);
9c6ce9fa	10	for (var finger_point = 0; finger_point <= params.finger_points; finger_point++) {
34c919e9	11	var angle = (finger_angle + twirl_angle * finger_point / params.finger_points) * 2 * Math.PI;
9c6ce9fa SW	12	var x = ring_radius * Math.cos(angle);
	13	var y = ring_radius * Math.sin(angle);
	14	path.push([x, y, params.finger_height * finger_point / params.finger_points]);
	15	}
	16	return nt3d.extrude(path, finger_crosssection, [0, 0, 1], nt3d.pathnormals_from_point(path, [0, 0, 0]));
	17	}
3bafa9bd SW	18	function medusa(params) {
3bafa9bd SW	19	var finger_crosssection = nt3d.circle(params.finger_radius, params.finger_faces);
00406c26	20	var fingers = [];
3bafa9bd SW	21	for (var ring_num = 0; ring_num < params.num_rings; ring_num++) {
3bafa9bd SW	22	var ring_radius = params.first_ring_radius + ring_num * params.ring_spacing;
bdd7bcc0 SW	23	var num_fingers = Math.round((ring_radius * 2 * Math.PI) / params.finger_spacing);
	24	for (var finger_num = 0; finger_num < num_fingers; finger_num++) {
	25	var finger_angle = finger_num / num_fingers;
b62906a2	26	fingers = fingers.concat(finger(params, finger_crosssection, ring_num, ring_radius, finger_angle));
911d073b	27	}
00406c26 SW	28	}
	29
	30	return fingers;
	31	}
3bafa9bd	32	var params = [["first_ring_radius", 20],
c81e16ac	33	["num_rings", 4],
3bafa9bd	34	["ring_spacing", 10, "Space Between Rings"],
bdd7bcc0	35	["finger_spacing", 10],
3bafa9bd	36	["finger_radius", 3],
c81e16ac	37	["finger_faces", 3],
3bafa9bd	38	["finger_points", 20],
34c919e9	39	["finger_twirl_distance", 50],
b62906a2	40	["finger_twirl_period", 2, "Finger Twirl Period (1=same, 2=alternating)"],
3bafa9bd	41	["finger_height", 100]];
00406c26 SW	42	</script>
	43	</head>
	44	<body onload="nt3d.framework(medusa, params)">
	45	<h1>Medusa</h1>
	46	<p>An artsy thing.</p>
	47	</body>
	48	</html>