Function fit_outline 

pub fn fit_outline(
    loops: &[Loop2],
    outline: &Outline,
) -> OgeomResult<Vec<Wire2d>>

Fit an outline of lines, tangent arcs and circles around a silhouette, every point of it between play and play + 2 tolerance outside the region the loops bound. See the module documentation.

The loops bound the points they wind around at least once, as shadow gives them: outer boundaries counter-clockwise, holes clockwise. The outline has one wire for each loop of the band’s middle: a hole narrower than the band is closed over, and with a negative play a part thinner than the band is gone. With fill_below set, the band is about the silhouette with its narrow holes and notches filled.

Errors

OgeomError::Construction if the tolerance is not positive, the play is not finite, round_below is not an angle from zero to a half turn, or fill_below is not a finite width of zero or more, and OgeomError::Numeric if a point is not finite.