Re: [Gnu3dkit-discuss] Shapes and geometry

[Philippe C.D. Robert]

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