Function make_polygon 

pub fn make_polygon(
    model: &mut Model,
    points: &[Point],
    closed: bool,
    tol: Tolerances,
) -> OgeomResult<Built>

Build a wire of straight segments through a sequence of points.

closed adds a final segment back to the first point, and does it by naming the first vertex again rather than making a coincident second one, which is what keeps the wire closed under is_wire_closed rather than merely looking closed.

Errors

OgeomError::Construction if there are fewer than two points, fewer than three for a closed polygon, if consecutive points coincide within tolerance (a zero-length edge is not an edge), or if a closed polygon’s ends do not meet.