Function bounded_half_space_prism 

pub fn bounded_half_space_prism(
    boundary: &Rings,
    plane: Plane3,
    prism: BoundaryPrism,
    agreement: bool,
    depth: SlabDepth,
    tolerance: Tolerance,
) -> Result<TriMesh, GeomError>

Build the slab of a half-space bounded by the prism of boundary along any axis that crosses the plane (#321).

The region is the side of plane that agreement selects (true the normal side) within prism, cut off at depth from the plane. The prism may stand at any angle to the plane: the near cap is the boundary carried along the axis onto the plane, the far cap the same moved along the axis to the depth. The boundary’s winding is its own affair: a ring wound either way, under a frame of either handedness, gives the same outward-facing solid, the loft’s stations ordered to suit.

Errors

InvalidInput, by name, for a plane without a normal, a boundary of fewer than 3 vertices, a prism axis that is zero, not finite or within the angular tolerance of the plane (its prism never crosses it), a frame whose x and y carried onto the plane are parallel or zero, and a depth that is not positive and finite. A boundary that bounds no region is refused by the cap triangulation, naming the ring.