Function half_section 

pub fn half_section(
    model: &mut Model,
    solid: &Shape,
    plane: &Plane,
    deflection: Deflection,
    tol: Tolerances,
) -> OgeomResult<SectionView>

Cut away one quarter of the part and draw the half-section.

The plane’s frame states the whole convention: material on the +z side is removed, but only over the frame’s +x half; the split line is the frame’s own y axis. The section outline covers the cut half, hatched by the draughtsman’s convention through hatch; the drawing shows the other half in outside view, which is what a half-section is for.

Errors

As section().