dotSCAD/docs/lib3x-in_polyline.md

in_polyline

Checks whether a point is on a line.

Since: 1.3

Parameters

• line_pts : The line points.
• pt : The point to be checked.
• epsilon : An upper bound on the relative error due to rounding in floating point arithmetic. Default to 0.0001.

Examples

use <in_polyline.scad>;

pts = [
    [0, 0],
    [10, 0],
    [10, 10]
];

echo(in_polyline(pts, [-2, -3]));  // false
echo(in_polyline(pts, [5, 0]));    // true
echo(in_polyline(pts, [10, 5]));   // true
echo(in_polyline(pts, [10, 15]));  // false

---

use <in_polyline.scad>;

pts = [
    [10, 0, 10],
    [20, 0, 10],
    [20, 10, 10]
]; 

echo(in_polyline(pts, [10, 0, 10]));  // true
echo(in_polyline(pts, [15, 0, 10]));  // true
echo(in_polyline(pts, [15, 1, 10]));  // false
echo(in_polyline(pts, [20, 11, 10])); // false