itaps-parallel inconsistencies in getAllVtxCoords

[Carl Ollivier-Gooch]

Tim Tautges wrote:
> I'd rather we returned 3*num_vtx, that way apps don't need to call 
> num_dimensions and branch on that.  But, I do 3d for everything.  Come 
> to think of it, why is it we need to prescribe what is returned? There's 
> a size returned for that coordinate array, isn't there?  Then the number 
> of dims is coords_size/num_vtx.

But the app knows whether it's dealing with a 2D mesh or a 3D mesh, 
surely, and isn't too likely to need to do that branch in inner loops.

Carl

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