[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Gnu3dkit-discuss] Shapes and geometry
From: |
Philippe C.D. Robert |
Subject: |
Re: [Gnu3dkit-discuss] Shapes and geometry |
Date: |
Wed, 10 Jul 2002 00:50:40 +0200 |
On Tuesday, July 9, 2002, at 05:01 PM, Brent Gulanowski wrote:
Sorry, I do not quite know the best way to explain it. When something
is represent by one of a group of shapes, then all of those shapes have
to have their transformation updated when their position changes. I was
speculating that this would add up in situations where a lot of switch
groups were used. But maybe the common transformations would all be in
the group, and the update would be a pittance. Of course I shouldn't
profile in advance :). And I perhaps don't yet quite understand how
switch groups work.
In this case you would use the transformation on the group, I guess.
So what would a shape be able to do with multiple geometry instances?
Of course if the feature has relatively no expense, it will find its
uses eventually.
You could use different kind of representations to create "one 3D shape"
w/o the need of using a group node.
-Phil
--
Philippe C.D. Robert
http://www.nice.ch/~phip