Function make_helical_sweep 

pub fn make_helical_sweep(
    model: &mut Model,
    profile: &Shape,
    axis: Axis,
    pitch: f64,
    turns: f64,
    left_handed: bool,
    taper_per_turn: f64,
    tol: Tolerances,
) -> OgeomResult<Built>

Sweep a planar profile lying in a plane through axis along a helix about axis: a screw motion, the profile keeping its plane through the axis the whole way, every point of it running its own helix. The thread and spring operation.

pitch is the advance per turn along axis, turns how far the profile turns, left_handed turns it the other way about the axis for the same advance, and taper_per_turn moves every point away from the axis by that much per turn (a conical helix; zero for a cylindrical one). The walls are fitted through each profile edge’s exact screw images; the caps are the profile where it starts and where it ends.

Errors

OgeomError::Construction if the profile is not a planar face whose plane holds the axis, reaches the axis, would meet itself one turn on (its extent along the axis is not less than the pitch), or tapers onto the axis; if pitch or turns is not positive. OgeomError::NotDone if a wall cannot be fitted.