Quest provides spatial queries and operations on a mesh.

Classes to read in and functions to test and repair surface meshes composed of 2D triangles embedded in 3D
Functions to query the signed distance of a point to a 3D surface mesh
Functions to query whether a point is inside a 3D surface mesh
A class to locate a physical point in a cell of a high-order mesh
A function to find the nearest neighbor for each of a set of points