005f2e8918
- The writers have changed from being a generic state-less set of routines to more properly conforming to the normal notion of a writer. These changes allow us to combine output fields (eg, in a single VTK/vtp file for each timestep). Parallel data reduction and any associated bookkeeping is now part of the surface writers. This improves their re-usability and avoids unnecessary and premature data reduction at the sampling stage. It is now possible to have different output formats on a per-surface basis. - A new feature of the surface sampling is the ability to "store" the sampled surfaces and fields onto a registry for reuse by other function objects. Additionally, the "store" can be triggered at the execution phase as well
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