I've got a potato-like 3D shape that was reconstructed from some
anatomical images. I need to cut it into slices (ultimately so that I
can assign different properties to different slices). What makes sense
to me is to create a series of thin hexahedra (such that every other
slice is represented), and intersect this with the potato to obtain
half the slices. Then subtract those slices from the potato to get the
other half. Does that sound like a reasonable way to do it?
Assuming an affirmative answer to that question, would someone be able
to quickly rattle off the command to create a solid hexahedron from
How about just using the "Slice" command? Orient the UCS to the plane you
would like to slice, draw a circle at each elevation you need a slice, then
Slice >> Object (select a circle) >> Both (to retain both halves)
I perhaps spoke too soon. I am not familiar with all that AutoCAD is
doing with the SLICE command. I have 100 planes defined in the same
coordinate system as my potato. My first effort was to make a lot of
slice commands using those same coordinates, e.g.,
But this doesn't seem to produce the desired result. The first several
are correct, and then it falls apart. From documentation I guessed
that AutoCAD is changing the UCS on me. So I inserted a "ucs world"
before each "slice" commmand. This doesn't solve all the problems
(I've plotted the planes in Matlab, by the way, so they're in the
Any help appreciated,
If you have Dynamics UCS's turned on (the DYN button), AutoCAD will try
to set itself to the UCS of whatever surface the cursor is over. Maybe
you need to be sure DYN is turned off... just a thought.
Thanks, I will try that. I work at a computer in the library (I am a
grad student), so it would be helpful to have a number of options to
try. Are there any other things that might be messing with the UCS?
(And just to confirm, am I correct in thinking that the SLICE command
accepts coordinates in UCS?)
Slice accepts coordinates in the current UCS, whatever that happens to
be. Pay attention to the prompts: if you are feeding three points to the
routine, be sure to specify the "3point" option in your (command)
statement. Otherwise, the last point might be getting interpreted as a
the reply to the "Select side to keep" prompt.
Note that AutoCAD 2008 (and maybe 2007? I forget) defaults to a
two-point vertical slice in the current UCS unless you specify the
Adam Baker wrote:
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