Function classify_point 

pub fn classify_point(
    topo: &Topology,
    solid: SolidId,
    point: Point3,
    deflection: f64,
    tolerance: f64,
) -> Result<PointClassification, OperationsError>

Classifies a point relative to a solid using analytic ray casting.

Shoots a ray from point and counts crossings with the solid’s boundary faces. Uses direct ray-surface intersection for analytic faces (plane, cylinder, cone, sphere, torus) and tessellation only for NURBS faces.

deflection controls tessellation quality for NURBS faces. tolerance is the distance threshold for “on boundary” classification.

Errors

Returns an error if the solid or its faces are invalid.