Inlining queries for the (fully) implicit triangulation #972
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The PR inlines some queries in the implementation of the (fully) implicit triangulation.
As discussed in the PR #971, this results in a 15% gain for discrete gradient computation (in parallel, 24 cores) on a 512³ dataset (ctBones, tested: bitwise compatibility on the output with the dev branch).
Note that, as discussed at the end of PR #971, several experiments (for instance, see the commits up to 57d7181) were made to further inline this class. However this resulted in a decreased gain (possibly due to the size of the inlined code saturating the cpu cache).