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"Lee Gaiteri" <LummoxJR@aol.com> wrote in message
news:G9G8nL.GL8@lugnet.com...
> > That's a good idea for a LDraw tool! I generally find that edge lines
> > are fairly difficult to handle, so I reckon other people will enjoy
> > the idea as well.
> >
> > Fredrik
>
> I've done a little more work on the edger, and in the process I've • discovered
> it's a *dandy* integrity checker. Edges that don't match up to just two • shapes
> tend to leave one edge dangling; this helped me find an unnecessary • triangle in
> the cat. I also discovered another place where the triangles were done
> incorrectly about the ears, and a messed-up vertex on the forepaws.
This could be of huge benefit to parts authors. Manually adding
conditional lines on complex surfaces has to be the _worst_ part of
authoring!
> The only place the edger seems to fail in finding what should be an edge • is
> when part of that edge is accounted for. It doesn't understand yet that • two
> shapes might share part of an edge, not all of it. In this case I had a • line
> extending partway along the longer edge adjoining two quadrilaterals, • and
> needed a conditional line along the shorter edge that they shared. • Ultimately I
> had to fudge this; the edger thought both the long and short edges were • single
> edges because they didn't match up completely. I'll probably improve the
> program soon to account for these cases.
I'm not sure why you would have an edgeline partway along the shared edge
between two quads. Unless you have a case where one of the quads extends
beyond the other quad. For example:
A B
C D E
F G H
Where ABEC is a longer quad which shares its lower edge with quads CDGF
and DEHG.
In that case, you would be better off replacing ABEC with a quad ABDC and
a tri BED. This prevents unsightly rendering holes caused by rounding
error.
> Since I don't want to keep posting large .dat files to the news server, • I'm
> keeping the latest version of the cat part on my Lego site (fairly new • and in
> progress): http://www.lummoxjr.com/lego/legos.html
> The newest .dat has the cat's inconsistencies and broken vertices fixed, • as
> well as all the conditional lines it needs.
Once you finalize the part, you might consider reposting it. Todd doesn't
mind the multiple .dat files, and someone searching for the cat 3 months
from now will have a better chance finding the most recent file if it's on
Lugnet.
Anyway, great part, and potentially even greater utility.
-John Van
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Message has 1 Reply:
 | | Re: Need part number for a dangerous predator
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| (...) Indeed. The task was way too daunting for me with all the triangles and quadrilaterals that were in place. (...) This is the sort of case that exists in my cat. On the bottom, back edge of the stud hole, there's a slight raised section in the (...) (24 years ago, 1-Mar-01, to lugnet.cad.dat.parts)
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Message is in Reply To:
| | Re: Need part number for a dangerous predator
|
| (...) I've done a little more work on the edger, and in the process I've discovered it's a *dandy* integrity checker. Edges that don't match up to just two shapes tend to leave one edge dangling; this helped me find an unnecessary triangle in the (...) (24 years ago, 28-Feb-01, to lugnet.cad.dat.parts)
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