Geodesic repulsion for surface sampling

[sheryjoe]

• [ ] geodesic distances on meshes

• [ ] unit tests

• [ ] automated tests

• [ ] scapula use case

• Storing a sparse variant of the distance matrix in memory, based on an upper bound for distances

• Using dimensionality reduction techniques on the distance matrix, and only storing that in memory

• Changes required to ShapeWorks to implement geodesics (in terms of the acceleration structure, sampling algorithms, preprocessing pipeline)

• Going from inter-vertex geodesics to geodesics between arbitrary particle positions

[medakk]

Plan for this release is to implement geodesics with gaussian entropy(ie: don't worry about cotan for now), with particle based caching. TODO: implement this for femur_mesh and compare time, speed, results with OpenVDB femur