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Don't Extrapolate with GRID3 (or cut off excess) [message #72000]

Fri, 30 July 2010 08:33

asdf
Messages: 7
Registered: August 2010

Junior Member

First, a little background. I have an irregular grid of 3D volume data
that I would like to visualize (currently using iVolume). The volume
is basically a wedge piece of a cylinder.
I've the placed data onto a regular, cube grid using GRID3, but the
result has a large, unrealistic value in an area outside of the
original irregular grid. From GRID3 documentation, it doesn't seem
like I can force it to ignore points outside the original grid, i.e.
don't extrapolate (correct?). I'm wondering if someone knows an
efficient way to set to NaN values in the regular grid that are
outside the original, irregular grid. It seems I can do a Delaunay
triangulation of the irregular grid, and use it somehow to find if a
point in the regular grid is inside the irregular grid, but I'm lost
on the details of how to do that.

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Don't Extrapolate with GRID3 (or cut off excess)

By: asdf on Fri, 30 July 2010 08:33

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