mirror of
https://github.com/JustinSDK/dotSCAD.git
synced 2025-01-18 06:38:14 +01:00
43 lines
1.3 KiB
Markdown
43 lines
1.3 KiB
Markdown
# polytransversals
|
|
|
|
Crosscutting a polyline at different points gets several transversals. This module can operate reversely. It uses transversals to construct a polyline. For example, imagine that you have the following transversals:
|
|
|
|
|
|
|
|
This module can use them to construct the polyline:
|
|
|
|
|
|
|
|
When using this module, you should use points to represent each transversal.
|
|
|
|
You can view it as a better polyline2d module. If you have only the points of a path, using `polyline2d` or `hull_polyline2d` is a simple solution. If you know the transversals along a path, you can use `polytransversals` to get a better polyline.
|
|
|
|
## Parameters
|
|
|
|
- `transversals` : A list of transversals. Each transversal is represented by a list of points. See the example below.
|
|
|
|
## Examples
|
|
|
|
include <rotate_p.scad>;
|
|
include <polytransversals.scad>;
|
|
include <hull_polyline2d.scad>;
|
|
|
|
r = 35;
|
|
tran_pts = [[-5, 0], [0, 5], [5, 0]];
|
|
|
|
trans = [
|
|
for(a = [0:10:120])
|
|
[
|
|
for(p = tran_pts)
|
|
rotate_p(p, [0, 0, a]) + [r * cos(a), r * sin(a)]
|
|
]
|
|
];
|
|
|
|
polytransversals(trans);
|
|
|
|
#for(tran = trans) {
|
|
hull_polyline2d(tran, 0.5);
|
|
}
|
|
|
|
|