dotSCAD/docs/lib3x-rails2sections.md

rails2sections

Create sections along rails. Combined with the sweep module, you can describe a more complex model.

Rails should be indexed count-clockwisely.

Since: 3.2

Parameters

• rails : A list of rails used to describe the surface of the model.

Examples

use <rails2sections.scad>;
use <hull_polyline3d.scad>;
use <sweep.scad>;

rails = [
    [[5, 0, 5], [15, 10, 10], [25, 20, 5]],
    [[-5, 0, 5], [-15, 10, 10], [-25, 20, 5]],
    [[-5, 0, -5], [-15, 10, -10], [-25, 20, -5]],  
    [[5, 0, -5], [15, 10, -10], [25, 20, -5]]
];

sections = rails2sections(rails);

sweep(sections);

#for(path = rails) {
    hull_polyline3d(path, 0.5);
}

use <bezier_curve.scad>;
use <rails2sections.scad>;
use <hull_polyline3d.scad>;
use <sweep.scad>;

t_step = 0.05;

rails = [
    bezier_curve(t_step, 
        [[1.25, 0, 5], [5, 20, 5], [16, 20, -2], [18, 20, 10], [30, 15, 8]]
    ),
    bezier_curve(t_step, 
        [[-1.25, 0, 5], [0, 20, 5],  [16, 22, -2], [18, 20, 10], [30, 25, 8]]
    ),
    bezier_curve(t_step, 
        [[-1.25, 0, -5], [0, 20, -5], [16, 20, 1], [18, 27, -3], [20, 27, -5]]
    ),
    bezier_curve(t_step, 
        [[1.25, 0, -5], [5, 20, -5], [16, 20, 1], [18, 17.5, -3], [20, 17.5, -5]]
    )
];


sections = rails2sections(rails);

sweep(sections);

#for(path = rails) {
    hull_polyline3d(path, 0.5);
}