Function classify_point_robust 

pub fn classify_point_robust(
    topo: &Topology,
    solid: SolidId,
    point: Point3,
    options: &ClassifyOptions,
) -> Result<PointClassification, CheckError>

Robust classification combining winding numbers and ray casting.

Uses winding numbers first, falling back to ray casting when the winding number is ambiguous (between 0.4 and 0.6). This provides the best accuracy for both clean and imperfect geometry.

Errors

Returns an error if the solid or its faces contain invalid topology references.