* Add a utility function which computes a sparse set of epsilon-sized grid cells surrounding an input surface. The function takes a point on the surface as input and finds all those epsilon grid cells that intersect the surface using a breadth first search over the grid space.
* Add a utility function which computes a sparse set of epsilon-sized grid cells surrounding an input surface. The function takes a point on the surface as input and finds all those epsilon grid cells that intersect the surface using a breadth first search over the grid space.
Former-commit-id: 1dbd225d993a5417c7d3bedc3a6ba354cc256956