Function axiolid_v0_4_visible_faces_copy 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn axiolid_v0_4_visible_faces_copy(
    context: AxiolidContextHandle,
    result: AxiolidResultHandle,
    regions: *mut AxiolidVisibleRegion,
    region_cap: usize,
    rings: *mut AxiolidRegionRing,
    ring_cap: usize,
    points_xy: *mut f64,
    point_cap: usize,
    triangles: *mut u32,
    triangle_cap: usize,
) -> AxiolidStatus

Copy the regions, rings, points and triangle indices of a visible-face result into caller-owned storage.

points_xy holds two f64 per point (x, then y) and point_cap counts points. Regions keep the outcome’s order; a region’s rings are its outer ring then its holes, in order; triangle indices are the region’s, ascending. A capacity below its count returns BufferTooSmall and writes nothing at all.

Safety

Every non-null pointer must be aligned and valid for the documented read or write extent.