[R] 3D equal-spaced closed mesh

Bert Gunter bgunter.4567 at gmail.com
Fri May 5 00:34:09 CEST 2017

The r-sig-geo list and corresponding cran task view *might* be a better
place to post and/look.


On May 4, 2017 12:51 PM, "Eric Krantz" <Eric.Krantz at respec.com> wrote:

> I have sonar image which is basically a point cloud (x, y, z) of an
> irregular underground cone-shaped structure. I am trying to create either
> (1) a closed 3D mesh with "equally spaced" mesh grid, or (2) a smooth
> closed surface, for instance by calculating connected localized regression
> surfaces. My Z (vertical) component is equally spaced, but X and Y consist
> of 128 points around the perimeter, regardless of diameter, which makes the
> grid size small where the diameter is small, and large where it is large.
> I'm looking for relatively equal grids, so I could use regression or
> interpolation to add points where needed, or conversely remove them, hence
> the idea of a localized surface regression. I've tried plot3D package, RGL,
> and a couple other packages including alphashape3d. I have not tried plotly
> or rms. So much time invested I thought I would ask for advice, if anyone
> knows a package or technique or can clue which direction to go. Thanks,
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