Subject:
|
Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments
|
Newsgroups:
|
lugnet.cad
|
Date:
|
Thu, 23 Aug 2007 01:02:21 GMT
|
Viewed:
|
5515 times
|
| |
![Post a public reply to this message](/news/icon-reply.gif) | |
--snip--
> > > Neither. It's just a question of wording. As long as you put the X, Y, and Z
> > > in the appropriate place (and the 0s in the other appropriate spots), and as
> > > long as you do your transformations correctly, both ways produce the same
> > > results.
> > >
> > > --Travis
> >
> > I think a full worked through example would do the specs a lot of good. If I
> > understand right the line
> >
> > 1 c x y z a b c d e f g h i part.dat
> >
> > transforms any point by the operation
> >
> > (u, v, w)->(x+a*u+b*v+c*w, y+d*u+e*v+f*w, z+g*u+h*v+i*w)
> >
> > With it spelled out explicitly like that a programmer can use whatever internal
> > format they like.
> >
> > Tim
>
> If I were new to 3D graphics (and I am ) I would be confused by this, I would
> have to ask someone else how to interpret the spec. I think Travis' proposal to
> show the two different matrices that can be built from the line of values is
> more clear than the equation. Like they say, a picture is worth a thousand
> words, or in this case, a big equation ;)
>
> Rob
I'm not new to matrices and Travis' example is still a little unrigorous which
is why I propose the mathematically sound form above. Note the amount of
discussion already here because of what people consider 'standard' or 'given'
forms of the matrices. The form I give is totally unambiguous.
Of course I'd like both ultimately.
Tim
|
|
Message has 1 Reply:
Message is in Reply To:
55 Messages in This Thread: ![LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -William Howard (20-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/246.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (20-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Michael Heidemann (20-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Michael Heidemann (20-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Orion Pobursky (20-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/246.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Rob Ross (21-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Roland Melkert (21-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (21-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/246.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Steve Bliss (21-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Rob Ross (21-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (21-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Roland Melkert (21-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Rob Ross (21-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/246.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Steve Bliss (21-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Rob Ross (21-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (21-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/246.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Leonardo Zide (21-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/246.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Rob Ross (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: OpenGL spec (was LDraw File Format spec) -William Howard (23-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: OpenGL spec (was LDraw File Format spec) -Leonardo Zide (23-Aug-07 to lugnet.off-topic.debate)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/268.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/246.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Leonardo Zide (22-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/268.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Don Heyse (23-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Kevin L. Clague (28-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/268.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -William Howard (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Leonardo Zide (23-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Leonardo Zide (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Anders Isaksson (23-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Rob Ross (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Rob Ross (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Timothy Gould (22-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Rob Ross (23-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![You are here](/news/here.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -William Howard (23-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Kevin L. Clague (28-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/246.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Kevin L. Clague (28-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (28-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Kevin L. Clague (28-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/28.gif) ![](/news/x.gif) ![](/news/x.gif) ![](/news/68.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (28-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Steve Bliss (28-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Travis Cobbs (28-Aug-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Kevin L. Clague (29-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -Rob Ross (21-Aug-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/268.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - Call for Public Comments -William Howard (6-Sep-07 to lugnet.cad)](/news/x.gif)
![](/news/x.gif) ![](/news/68.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated -Travis Cobbs (10-Sep-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated -Timothy Gould (10-Sep-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated -Travis Cobbs (11-Sep-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated -Don Heyse (11-Sep-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated -Travis Cobbs (11-Sep-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated -Don Heyse (11-Sep-07 to lugnet.cad)](/news/x.gif) ![](/news/46.gif) ![Re: LDraw File Format Spec 1.0 DRAFT - MATRIX section updated -Travis Cobbs (11-Sep-07 to lugnet.cad)](/news/x.gif)
- 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
|
|
|
|