<title>Serrated</title>
<script type="text/javascript" src="nt3d.js"></script>
<script type="text/javascript">
- function serrated(length, thickness, depth, serration_count, arc, steps_per_serration, edge_bevel_angle) {
+ function serrated(params) {
var tau = 2 * Math.PI;
- var path_length = serration_count * steps_per_serration;
+ var path_length = params.num_serrations * params.steps_per_serration;
var path = [];
for (var i = 0; i <= path_length; i++) {
- path[i] = [length*i/path_length,0,0];
+ path[i] = [params.length*i/path_length,0,0];
}
- var serration_length = length / serration_count;
+ var serration_length = params.length / params.num_serrations;
var serration_half_length = serration_length / 2;
- var serration_radius = serration_half_length / Math.sin(tau * arc / 2);
+ var serration_radius = serration_half_length / Math.sin(tau * params.arc / 2);
var serration_max_height = Math.sqrt(serration_radius*serration_radius - serration_half_length*serration_half_length);
// This emits a Sabre Grind. TODO: Support a double bevel.
// http://en.wikipedia.org/wiki/Grind#Typical_grinds
// http://www.allaboutpocketknives.com/images/aapk_content/blade_bevel.JPG
- var edge_height = thickness / (2 * Math.tan(tau * edge_bevel_angle));
+ var edge_height = params.thickness / (2 * Math.tan(tau * params.edge_bevel_angle));
function shape(i) {
- var serration_progress = (i % steps_per_serration) / steps_per_serration;
+ var serration_progress = (i % params.steps_per_serration) / params.steps_per_serration;
var serration_x = serration_progress * serration_length - serration_half_length;
var serration_height = serration_max_height - Math.sqrt(serration_radius*serration_radius - serration_x*serration_x);
- if (arc < 0) serration_height *= -1;
- var blade_height = depth + serration_height;
- return [[0, 0, 0],
- [blade_height - edge_height, 0, 0],
- [blade_height, thickness/2, 0],
- [blade_height - edge_height, thickness, 0],
- [0, thickness, 0]];
+ if (params.arc < 0) serration_height *= -1;
+ var blade_height = params.depth + serration_height;
+ return [[0, 0, 0],
+ [blade_height - edge_height, 0, 0],
+ [blade_height, params.thickness/2, 0],
+ [blade_height - edge_height, params.thickness, 0],
+ [0, params.thickness, 0]];
}
return nt3d.extrude(path, shape, [1,0,0], [0,0,1]);
}
- var params = [["Blade length", 100],
- ["Blade thickness", 2],
- ["Blade depth", 10],
- ["Number of serrations", 10],
- ["Arc of each serration (in turns)", .2],
- ["Steps per serration", 11],
- ["Edge bevel angle (in turns)", .05]];
+ var params = [["length", 100, ],
+ ["thickness", 2],
+ ["depth", 10],
+ ["num_serrations", 10],
+ ["arc", .2, "Arc of Each Serration (in turns)"],
+ ["steps_per_serration", 11],
+ ["edge_bevel_angle", .05, "Edge Bevel Angle (in turns)"]];
</script>
</head>
<body onload="nt3d.framework(serrated, params)">
projects / nt3d / blobdiff