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000366_owner-lightwave-l _Wed Jun 29 21:55:06 1994.msg
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1995-03-23
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Received: by netcom.com (8.6.8.1/SMI-4.1/Netcom) id VAA13938; Wed, 29 Jun 1994 21:21:47 -0700
Received: by netcom.com (8.6.8.1/SMI-4.1/Netcom) id SAA12554; Wed, 29 Jun 1994 18:43:50 -0700
Date: Wed, 29 Jun 1994 18:43:50 -0700
From: shf (Stuart Ferguson)
Message-Id: <199406300143.SAA12554@netcom11.netcom.com>
To: lightwave-l@netcom.com
Subject: Re: Booleans
Sender: owner-lightwave-l@netcom.com
Precedence: list
Reply-To: lightwave-l@netcom.com
| Mark writes:
| >when only a subset of the polygons are used, Modeler can screw up
| the boolean operation...
|
| doing the boolean operation subtract, for one, does not
| work unless you are working with what Modeler seems to
| think are two solids- i ran in to this problem when
| i *so diligently* removed lots of backfaces,un seen
| polys, etc.. Before performing my boolean subtraction
| stuff :-( ...and had to add back all of the polys
| to successfully cut out what i wanted :-)
Modeler does require two solids (one or more non-intersecting
meshes of polygons that close on themselves and have no holes).
If the shape is open, a boolean will not work and you should
use the "Add" option under booleans or solid drill and remove
the extra trimmings yourself. However, if you have two solids
you can greatly speed up a boolean operation by selecting only
those polygons which will get cut by the object in the background
layer. Just selecting all the polygons in the general vicinity
is often enough.
- Stuart