ENH: add directionalMeshWave functionality

Summary

For a given point within a given mesh, the existing meshWave method gives the orthogonal distance to a patch. In meshes with very steep terrain (e.g. a hill of 90 [deg]), this might be problematic for the fields that require the distance to the patch associated with the terrain surface.

directionalMeshWave is a variant of meshWave distance-to-patch method, which ignores the component in the specified direction. Can be used e.g. to calculate the distance in the z-direction only.

Requirement by CENER Implementation by Mattijs Janssens

Resolved bugs (If applicable)

None

Details of new models (If applicable)

meshWave

directionalMeshWave

Risks

None

changed milestone to %v2006

added enhancement label

no output difference in tutorial/mesh/moveDynamicMesh/SnakeCanyon with meshWave. I think its effect will only be present when there will be escarpments or steep slopes in mesh domain.

changed contiguous funcs based on Mark's warnings, with 'is_contiguous' structs, and removed tensor* variants of contiguous there. plus, some cosmetics.

compiled with gcc7.4.

if everything is fine for you as well, it is good to go.

mentioned in commit aeebdc3c

merged

changed title from WIP-ENH: add directionalMeshWave functionality to ENH: add directionalMeshWave functionality

changed the description