I apologise if this message turns up twice...  I've assumed that last
time I sent this I was using the wrong address somehow.

-------- Original Message --------
Hi,

I hope that this is a reasonable place to ask this question.  I could do
with knowing if the following is possible, and if a hint of how it might
work could be thrown in, I would be very grateful.

I have data that fills a cuboid volume and I would like to be able to
split up this volume in a data dependant way and then perform a
calculation on subsets of the data derived from this splitting.

So:
1. is it possible to split up a volume with an irregular shaped volume?
2. can I use an isosurface to define this boundary?
3. is it possible to numerically integrate a volume?

I found a previous message where someone wanted to select circular
regions and was advised to use the compute and construct modules to do
this.  I am not entirely sure how this would work yet but it suggests to
me that my task (or some of it) should be possible.

Cheers,
        Gary

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