X-Git-Url: http://git.scottworley.com/nt3d/blobdiff_plain/911d073bae58f93ab72a7afa242a0a478299b8e9..refs/heads/master:/medusa.html diff --git a/medusa.html b/medusa.html index 58319c0..d96ec35 100644 --- a/medusa.html +++ b/medusa.html @@ -3,31 +3,48 @@ <title>Medusa</title> <script type="text/javascript" src="nt3d.js"></script> <script type="text/javascript"> - function medusa(base_ring_radius, num_fingers, finger_radius, finger_faces, finger_points, finger_twirl, finger_height) { - var finger_crosssection = nt3d.circle(finger_radius, finger_faces); + 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); + var widen_scale = params.widen_amount / (Math.exp(params.widen_sharpness) - 1); + for (var finger_point = 0; finger_point <= params.finger_points; finger_point++) { + var finger_progress = finger_point / params.finger_points; + var angle = (finger_angle + twirl_angle * finger_progress) * 2 * Math.PI; + var r = ring_radius + widen_scale * Math.exp(finger_progress * params.widen_sharpness); + var x = r * Math.cos(angle); + var y = r * Math.sin(angle); + var z = params.finger_height * finger_progress; + path.push([x, y, z]); + } + 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 i = 0; i < num_fingers; i++) { - var finger_angle = i / num_fingers; - var path = []; - for (var j = 0; j <= finger_points; j++) { - var angle = (finger_angle + finger_twirl * j / finger_points) * 2 * Math.PI; - var x = base_ring_radius * Math.cos(angle); - var y = base_ring_radius * Math.sin(angle); - path.push([x, y, finger_height * j / finger_points]); + 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)); } - var finger = nt3d.extrude(path, finger_crosssection, [0, 0, 1], nt3d.pathnormals_from_point(path, [0, 0, 0])); - fingers = fingers.concat(finger); } return fingers; } - var params = [["Base ring radius", 100], - ["Number of fingers", 5], - ["Finger radius", 3], - ["Finger faces", 10], - ["Finger points", 20], - ["Finger twirl (in turns)", .1], - ["Finger height", 100]]; + 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], + ["widen_sharpness", 2, "Widen Sharpness (0=disable widening)"], + ["widen_amount", 30]]; </script> </head> <body onload="nt3d.framework(medusa, params)">