dotSCAD/docs/lib-path_extend.md

path_extend

It extends a 2D stroke along a path. This module is suitable for a path created by a continuous function.

It depends on the rotate_p function and the polytransversals module. Remember to include "rotate_p.scad" and "polytransversals.scad".

When using this module, you should use points to represent the 2D stroke.

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 <polytransversals.scad>;
include <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);
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]) 
    path_extend(
        stroke2, 
        [for(pa = pts_angles) pa[0]]
    );