Subject:
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Re: MiniBot Head Star Wars Battle Droid is complete
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Newsgroups:
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lugnet.cad.dat.parts
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Date:
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Mon, 21 May 2001 20:10:52 GMT
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Viewed:
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1240 times
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In lugnet.cad.dat.parts, Nathan Wright writes:
> In lugnet.cad.dat.parts, Don Heyse writes:
> > This piece is so cool. But some of the optional lines aren't quite
> > right. A few appear when they shouldn't and some never seem to show
> > at all. You can see this in l3glite. Load the piece and zoom in so
> > it fills the window. Then spin it around with the mouse.
> > You can do the same thing with l3lab. Zoom in 1000% and turn off
> > linetypes 3 and 4. Then hold the ctrl key and spin the piece with
> > the mouse.
>
> It didn't take very long (only a couple of hours) to put all of the lines on
> it. Then I checked it in MLCAD and L3Lab (1200%), and I saw that a chunk of
> lines that would not show where they should and a few lines that would not
> disappear. For the next 5 days (2 to 3 hours each day,)I worked on getting
> them to show up in the right places. It works fairly well when you consider the
> size it is going to be when people use this in a model.
>
> So I am not going to working on it anymore, it drove me nuts enough already
> (unless I begin to like it...)
I know how that is. I've only made one piece and it took me so long
that I haven't found the motivation yet to do another. Anyways, I was
just trying to be helpful, but perhaps I should quit cad.dat.parts
until I make another piece so can I remember better how much work it
is.
I will make one more suggestion though FWIW. I think part of the
problem with the type 5 lines is that the points in many of the quads
are not co-planar. While this is legal in the DAT file format, it
does make it difficult to get the optional lines to look good. Take a
piece of paper and crease it diagonally. Then view it edge on and
you'll see the front and rear edges cross. This means the optional
lines on these edges would cross when viewed from that angle. Also I
suspect most of the viewing programs have to take extra steps to
convert warped quads into triangles before rendering. Does anyone
know what the current thinking is on warped quads? Was this discussed
during the great BFC debate?
Don
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Message has 1 Reply:
 | | Re: MiniBot Head Star Wars Battle Droid is complete
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| (...) Generally, warped quads are bad. Even if a rendering program detects the warpage, it has to guess at the correct rendering. Typically, this means to split the quad into two triangles, along one of the diagonals. In other words, go from this: (...) (24 years ago, 22-May-01, to lugnet.cad.dat.parts)
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Message is in Reply To:
| | Re: MiniBot Head Star Wars Battle Droid is complete
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| (...) Annoying isn't it? (...) It didn't take very long (only a couple of hours) to put all of the lines on it. Then I checked it in MLCAD and L3Lab (1200%), and I saw that a chunk of lines that would not show where they should and a few lines that (...) (24 years ago, 19-May-01, to lugnet.cad.dat.parts)
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