Writing mesh distance scalar fields

[jadie1]

Currently, if you want to compute the distance between two meshes and save it as a scalar field (so you can visualize it as a heat map), using the Python API this is what you must call:

import shapeworks as sw
import numpy as np

# Load meshes
mesh_1 = sw.Mesh([path_to_mesh1])
mesh_2 = sw.Mesh([path_to_mesh2])

# Compute distance
distance_values, cell_ids  = mesh_1.distance(mesh_2, method=sw.Mesh.DistanceMethod.PointToCell)

# Write mesh with distance scalar field
mesh_1.setField(name='distance', array=distance_values, type=sw.Mesh.FieldType.Point).write([path_to_output_mesh])

This is not very intuitive. I think we should set the field automatically when distance is called so that we can just call:

mesh_1.distance(mesh_2).write(path_to_output_mesh])

At the very least, we should set a default parameter for the setFiled() type option. And also add documentation for how to do this because, as far as I know, there currently isn't any.