mirror of
https://github.com/JustinSDK/dotSCAD.git
synced 2025-02-22 16:50:36 +01:00
78 lines
2.0 KiB
Markdown
78 lines
2.0 KiB
Markdown
# shape_path_extend
|
|
|
|
It extends a 2D stroke along a path to create a 2D shape. This module is suitable for a path created by a continuous function. The returned points can be used with xxx_extrude modules of dotSCAD. The shape points can be also used with the built-in polygon module.
|
|
|
|
When using this module, you should use points to represent the 2D stroke.
|
|
|
|
It depends on the `rotate_p` function. Remember to include "rotate_p.scad" and "polytransversals.scad".
|
|
|
|
## Parameters
|
|
|
|
- `stroke_pts` : A list of points represent a stroke. See the example below.
|
|
- `path_pts` : A list of points represent the path.
|
|
- `scale` : Scales the 2D shape by this value over the length of the extrusion.
|
|
- `closed` : If the first point and the last point of `path_pts` has the same coordinate, setting `closed` to `true` will connect them automatically.
|
|
|
|
## Examples
|
|
|
|
include <rotate_p.scad>;
|
|
include <shape_path_extend.scad>;
|
|
include <circle_path.scad>;
|
|
include <archimedean_spiral.scad>;
|
|
|
|
$fn = 96;
|
|
|
|
stroke1 = [[-5, 2.5], [-2.5, 0], [0, 2.5], [2.5, 0], [5, 2.5]];
|
|
path_pts1 = circle_path(50, 60);
|
|
polygon(
|
|
shape_path_extend(stroke1, path_pts1)
|
|
);
|
|
|
|
|
|
stroke2 = [[-4, 0], [0, 4], [4, 0]];
|
|
pts_angles = archimedean_spiral(
|
|
arm_distance = 17,
|
|
init_angle = 180,
|
|
point_distance = 5,
|
|
num_of_points = 85
|
|
);
|
|
|
|
translate([120, 0, 0])
|
|
polygon(
|
|
shape_path_extend(
|
|
stroke2,
|
|
[for(pa = pts_angles) pa[0]]
|
|
)
|
|
);
|
|
|
|
|
|
|
|
include <rotate_p.scad>;
|
|
include <bezier_curve.scad>;
|
|
include <shape_path_extend.scad>;
|
|
|
|
include <polysections.scad>;
|
|
include <path_extrude.scad>;
|
|
|
|
|
|
t_step = 0.1;
|
|
width = 2;
|
|
|
|
p0 = [0, 0];
|
|
p1 = [40, 60];
|
|
p2 = [50, 90];
|
|
p3 = [0, 200];
|
|
|
|
path = bezier_curve(t_step,
|
|
[p0, p1, p2, p3]
|
|
);
|
|
|
|
stroke = [[-5, 2.5], [-2.5, 0], [0, 2.5], [2.5, 0], [5, 2.5]];
|
|
|
|
path_extrude(
|
|
shape_path_extend(stroke, path, scale = 5),
|
|
path,
|
|
scale = 0.1
|
|
);
|
|
|
|
 |