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 CAD / LDraw Files / Parts / 3519
3518  |  3520
Subject: 
Re: panel with round windows (for 10020) updated
Newsgroups: 
lugnet.cad.dat.parts
Date: 
Wed, 10 Apr 2002 10:08:14 GMT
Viewed: 
4142 times
  
> The rings aren't actually for POV- they're for LDraw.  They are simply
> sections of 16-sided "curves" (and yes- they are in the "p" directory).  The
> rotation/scaling matrix turns them and scales them up to fit onto the
> panel's surface.  You can do this manually by tweaking the values directly,
> or do the rotation in a tool like MLCAD.  Once you know how to work with the
> primitives, they make parts like this trivial to create.

I don't know if we understand each other. As I understood from de L3P
manual, some primitives from the P-dir are substituted by L3P to POV
primitives. If you take a look at
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=152159 (where the new panels
are used) you will notice that the circels are now round, and not, as in my
version, 18-sided.
Let me get this staight: I don't want to sound as a know-it-all!

> Using primitives at this point doesn't really do anything for you, because
> you already manually built the quads and triangles that make up the curves.
> The only reason to switch over now is to make for a smaller file and to be
> more consistent with other parts (neither of which is critical in this
> case).  Your approach actually models a curve slightly better, as it uses
> 18-sided polygons instead of 16-sided.

I understand, but again, I don't understand or know which primiives are
available and what they are used for.

> Also- I believe that chrome sections are supposed to be separated into
> subfiles, though I'm not sure exactly what the rules are here.

Thanks for the feedback!
De groeten, Jeroen



Message has 2 Replies:
  Re: panel with round windows (for 10020) updated
 
(...) Go to take a look at your ldraw/p/ directory. ;) More seriously, I've reposted the slightly-dated Primitives Reference page at (URL). That page gives you an outline of most of the 'types' of primitive files. Steve (24 years ago, 10-Apr-02, to lugnet.cad.dat.parts)
  Re: panel with round windows (for 10020) updated
 
(...) I stand corrected- I didn't realize that L3P did that. I just checked through the text file and found the reference to it. So yes, using primitives is a better way to go. Ugh, and now I have to rethink how I lay out some parts, as the (...) (24 years ago, 10-Apr-02, to lugnet.cad.dat.parts)

Message is in Reply To:
  Re: panel with round windows (for 10020) updated
 
(...) The rings aren't actually for POV- they're for LDraw. They are simply sections of 16-sided "curves" (and yes- they are in the "p" directory). The rotation/scaling matrix turns them and scales them up to fit onto the panel's surface. You can do (...) (24 years ago, 9-Apr-02, to lugnet.cad.dat.parts)

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