Subject:
|
Re: New Primitive Class
|
Newsgroups:
|
lugnet.cad.dat.parts
|
Date:
|
Sun, 23 Mar 2003 16:09:46 GMT
|
Viewed:
|
1271 times
|
| |
|
|
In lugnet.cad.dat.parts, Paul Easter writes:
> In lugnet.cad.dat.parts, John Riley writes:
> > My current 33089 (in PT) is a rather bulky file (55KB), so to streamline it,
> > I decided to make a few new primitives. One of these was a torus with major
> > radius 1 and minor radius 1.
>
> When Steve and I were working on the format for the torii, I believe we said
> we would deal with this issue when it arose. Now it has.
>
> The spreadsheet I made to create p/16 and p/48 torii also included support
> for this occurance. Basically, I changed the first letter to "r". The header
> looked like this;
> - 0 non-Torus Outside 1 x 1 x 0.25
> - 0 Name: r04o0100.dat
> This was not a discussed issue, so I took some liberties with it. I have not
> settled on the "non-Torus" header, but it let me move on.
I checked some geometry websites, and the consensus is that these are tori.
Just not the common type.
> Inverted is a word that came to mind but didn't seem to apply.
Inverse-ratio torus is a better name, but is fairly lengthy. An inverted
torus, I think, is still a torus, just with the surfaces inverted, and would
be done using BFC, I imagine. Which would be completely useless.
How about uncommon or atypical? These seem more appropriate than inverted.
> This is what my spreadsheet came up with:
> - 0 non-Torus Outside 1 x 1.1333 x 0.25
> - 0 Name: r04o0113.dat
>
> - 0 non-Torus Outside 1 x 1.125 x 0.25
> - 0 Name: r04o0112.dat
>
> not much difference.
>
> I have the following "non-Torus" files already generated. Let me know if you
> want them to play with;
> r04o0100.dat
> r04o0200.dat
> r04o0300.dat
>
>
> Paul
This appears to be the RRdd solution. This is a solution that I liked,
although it loses some of the precision that the common torus had (one of
Travis' concerns, as was mine).
I must confess that I like the 9999 solution as in Travis post, especially
if the spec is edited to recognize t04oNNNN as a torus with minor axis
radius = N/9. Thus, I went ahead and submitted the unit torus as
t04o9999.dat in PT.
If the solution is to use the rFFXRRdd format, then I'll go back and rename
the unit torus to r04o0100.dat I hope this is documented in the Primitives
Reference guide, as the unit torus could be quite useful. The other
uncommon tori, they'll probably never see the inside of a dat file.
For even more future discussion, there's the issue of the inner version of
these tori. After the unit torus, the inner uncommon torus start
overlapping. I think that keeping the file in the +x+y+z octant is the
solution, but again, this is future discussion for a file that in all
likelihood will never even be created.
Thanks for your help, and if the verdict is to rename t04o9999 to r04o0100,
please let me know. And I think Uncommon Torus 1 x 1 x 0.25 is probably the
best header. Again, LMKWYT
John
|
|
Message has 1 Reply:
 | | Re: New Primitive Class
|
| (...) This topic still needs some approval before we nac move it to finalization. We have been discussing torii(toruses) where the tube radius is equal or greater than the major radius. This only works for the outside sections since the inside (...) (21 years ago, 4-Jul-03, to lugnet.cad.dat.parts)
|
Message is in Reply To:
| | Re: New Primitive Class
|
| (...) When Steve and I were working on the format for the torii, I believe we said we would deal with this issue when it arose. Now it has. (...) The spreadsheet I made to create p/16 and p/48 torii also included support for this occurance. (...) (22 years ago, 23-Mar-03, to lugnet.cad.dat.parts)
|
7 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
|
|
|
|
