def normal(self, surface_point: tuple) -> tuple:
on_surf, surf_indexes = on_aabb_surface(self._size, surface_point, atol=2*EPS_ZERO)
if not on_surf:
raise GeometryError(
"Point is not on surface.",
{"point": surface_point, "geometry": self}
)
if len(surf_indexes) != 1:
raise GeometryError(
"Point is on multiple surfaces.",
{"point": surface_point, "geometry": self}
)
idx = surf_indexes[0]
# normal vector in the local frame
return NORMALS[idx]
def is_on_surface(self, point):
on_surf, _ = on_aabb_surface(self._size, point, atol=2 * EPS_ZERO)
return on_surf