Special:
|
[DAT] (requires LDraw-compatible viewer)
|
Subject:
|
Re: Type 5 lines at the edge of primitives
|
Newsgroups:
|
lugnet.cad.dev
|
Date:
|
Tue, 7 May 2002 06:12:44 GMT
|
Viewed:
|
624 times
|
| |
|
|
In lugnet.cad.dev, Mark Kennedy writes:
> In lugnet.cad.dev, Ross Crawford writes:
> > In lugnet.cad.dev, Travis Cobbs writes:
> > > A good example of this is the sphere primitive. The included type 5 lines
> > > at the edge are ... well ... unique. Look at
> > > http://home.san.rr.com/tcobbs/LDView/test2.gif and
> > > http://home.san.rr.com/tcobbs/LDView/test3.gif to see what I'm talking
> > > about. In these shots, a line is drawn from the first point of each type 5
> > > line to its two control points. (In addition, all type 5 lines are drawn,
> > > not just the ones that should be.)
> > >
> > > The problem is that they won't be drawn correctly if you (say) put 4 of
> > > these together to form a hemishere. (They'll be omitted from some angles
> > > when they should have been there.) On the other hand, if you set it up so
> > > that a hemisphere works, then they'll be drawn when they're not supposed to
> > > be if you put the hemisphere on top of a cylinder.
> >
> > I'm not sure if I understand this properly - if the second "test" point is
> > down the line where the cylinder joint (between two rects) would be if it
> > was attached to a cylinder, won't that work? It'll mean the same line may
> > occasionally be displayed twice, but generally it'd be displayed by one or
> > the other hemisphere - if one misses it, the other would get it, wouldn't it?
> >
> > Or am I totally missing the problem?
> >
> > ROSCO
>
> Here is a model that demonstrates some of the problems with placing type 5
> lines at the edge of the cylinder primitive.
>
> 0
> 1 16 0 0 0 10 0 0 0 10 0 0 0 10 1-4cyli.dat
> 1 16 0 0 20 10 0 0 0 10 0 0 0 0 -10 1-4cyli.dat
> 1 16 -20 0 20 10 0 0 0 10 0 0 0 10 1-4cyli.dat
> 0
>
> Take a look at it from front, back, left, and right and you'll see type 5 • lines
> where they shouldn't be.
And then there is matching a sphere with a torus Which is demonstrated with
this file.
0
1 16 0 0 0 78 0 0 0 -78 0 0 0 78 1-8sphe.dat
1 16 0 0 0 90 0 0 0 90 0 0 0 90 t04i1333.dat
0
|
|
Message has 1 Reply:
 | | Re: Type 5 lines at the edge of primitives
|
| (...) I'm not following the problem with this one. Then again, I'm not sure where lines are supposed to be, and where they aren't--the construct is a bit abstract. (...) Hmm. The only way to avoid this problem is to not include the edge lines in the (...) (23 years ago, 7-May-02, to lugnet.cad.dev)
|
Message is in Reply To:
| | Re: Type 5 lines at the edge of primitives [DAT]
|
| (...) Here is a model that demonstrates some of the problems with placing type 5 lines at the edge of the cylinder primitive. 0 1 16 0 0 0 10 0 0 0 10 0 0 0 10 1-4cyli.dat 1 16 0 0 20 10 0 0 0 10 0 0 0 0 -10 1-4cyli.dat 1 16 -20 0 20 10 0 0 0 10 0 0 (...) (23 years ago, 7-May-02, to lugnet.cad.dev)
|
12 Messages in This Thread:
 
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
