Re: My lines disappear? -Reply

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Scott McMillan (scott++at++ht.com)
Thu, 14 Nov 1996 10:46:22 -0500 (EST)

>
> I had a problem with lines disappearing when
> putting them in a gset using Performer 1.2. I was
> able to make them reappear by putting a large
> bounding box around them. Not sure why they were
> getting clipped but this may be your problem.
>
> Jim Cunningham
> Logicon Technical Services, Inc.

Hmmm...this problem sounds familiar. I had this problem when I would add
GeoSets with lines that were initialized in some position (near the origin
for example). I would then move the lines around by changing the vertex
information directly. This is BAD because the bounding boxes do not get
updated and if your view strays away from the original position of the lines
they will get culled.

scott

-- 
  Scott McMillan  |       HT Medical, Inc.      | Developing virtual environ-
   scott++at++ht.com   |      http://www.ht.com      | ment medical and surgical
 Ph: 301-984-3706 | 6001 Montrose Rd., Ste. 902 | simulations and surgery
Fax: 301-984-2104 |     Rockville, MD 20852     | simulation creation tools.


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