Discard prisms with no volume or zero density #334
Merged
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Discard null prisms before passing them to the forward modelling
functions. A null prism is the one that has either zero volume or zero
density. Since they don't contribute to the generated field, we can save
some computation time by discarding them.
Relevant issues/PRs:
Related to #65 (@aguspesce noticed some zero division errors when passing zero volume tesseroids to the forward model computation).