Function make_pipe_shell_laws 

pub fn make_pipe_shell_laws(
    model: &mut Model,
    profile: &Shape,
    spine: &Shape,
    law: &PipeLaw<'_>,
    laws: &PipeLaws,
    corners: PipeCorners,
    tolerance: f64,
    tol: Tolerances,
) -> OgeomResult<Built>

make_pipe_shell_evolving with a law of its own for the scale and for the twist: at each point of the spine the section is the profile scaled about the spine by laws.scale and turned about it by laws.twist, each read at the share of the spine’s length run there, then carried by law.

Linear laws build as make_pipe_shell_evolving does. Any other law skins each loop through its placed sections, held to tolerance against the laws; round a smooth closed spine the twist may follow any law that ends where a linear one may, unscaled. A scale law through values is above naught all along: a cubic span keeps between its ends. A law given as a function is read wherever the sweep places a section or checks its skin, and is never taken as standing still: every run it moves along is skinned, and round a closed spine it twists only, as a scale it is refused there.

Where laws.contact asks, the profile is first moved rigidly onto the spine’s start as PipeContact defines, and the moved profile is swept as above; the history records the given profile as generating the result.

Round sharp corners a face sweeps run by run as make_pipe_shell_with does, each corner turned as corners asks: each smooth run is swept under the laws over its share of the spine’s length, from the section it starts with (a run the laws neither scale nor turn is the prism or pipe shell of that section), and the runs meet at each corner on the section the laws give there.

Errors

As make_pipe_shell_evolving and, round sharp corners, as make_pipe_shell_with; and OgeomError::Construction if a law’s shares do not rise strictly to one, a value is not finite, a scale law through values reaches naught or below, or a law given as a function does not give the start value at the spine’s start or, as a scale, gives naught or below where it is read; and, where laws.contact moves the profile, if the profile is not planar, or its plane holds the spine’s start tangent under a correction.