Subject:
|
Re: Precision in .DAT files
|
Newsgroups:
|
lugnet.cad
|
Date:
|
Tue, 9 Jul 2002 11:52:04 GMT
|
Viewed:
|
922 times
|
| |
|
|
In lugnet.cad, Marek Idec writes:
> Dear All,
> I didn't find in LDraw file format specification anything about a precision
> used in co-ordinates and scaling parameters. In most of files I found
> precision maximum 4 digits after decimal point. I'm pretty sure that I saw
> a file with 6 digits precision.
> Are there any formal limitations regarding precision? What is reasonable choice?
>
> Another question related to this subject. If one uses only lines, triangles
> and quads in created part, then is very easy to judge whether there are gaps
> between them or no. What about other primitives used, especialy transformed
> (scalled, rotated etc.)? How to stick other vertices to them? What is the
> maximum distance between two points to be considered as one point?
>
> Regards
>
> Marek Idec
For parts, three decimal places is generally considered acceptable.
Primitives are usually coded with four decimal places of precision, so that
they can be scaled-up by a factor of 10 without degrading the precision
below three decimal places. IMHO, six decimal places is overkill.
Hope this helps, Chris
|
|
Message is in Reply To:
 | | Precision in .DAT files
|
| Dear All, I didn't find in LDraw file format specification anything about a precision used in co-ordinates and scaling parameters. In most of files I found precision maximum 4 digits after decimal point. I'm pretty sure that I saw a file with 6 (...) (24 years ago, 9-Jul-02, to lugnet.cad)
|
4 Messages in This Thread:
 
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
