Add searchableSurface single point getVolumeType

For #921 (closed) we need to cycle over potentially several surfaces and faces. It is too slow and costly to use the getVolumeType for the list of points - need the lowest level single point query.

all searchableSurface api uses list of points/vectors since there might be a lot of overhead doing it on a point by point basis. E.g. distributedTriSurfaceMesh which builds send/receive map and sends over lots of data.

I figured that we probably need both, In most cases, the detailed acceptance method can be a file inline static to minimize code duplication and maximize efficiency.

It used to have a single point API. We scrapped it since it hardly ever was worth the saving in overhead (only for trivial shapes) and excluded a lot of potential optimisations (e.g. distributeTriSurfaceMesh). Instead we rely on the caller to pre-collect queries.

Probably was a premature optimization on my part. I wanted to avoid unnecessary looping over points (when there is a list of searchable surfaces), but this use is probably fairly rare and then we have a number of other issues as you pointed out. I'll close this out.

closed

mentioned in issue #929 (closed)