Subject:
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Re: *** MLCad V3.30 ***
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Newsgroups:
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lugnet.cad.mlcad
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Date:
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Wed, 10 Feb 2010 19:11:02 GMT
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Viewed:
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15166 times
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In lugnet.cad.mlcad, Michael Lachmann wrote:
> I thought the LDraw group doesn't allow any other colors than the standard
> ones?
As it happens, the LSC has been dealing with this very issue for the past few
months. There is no mention made of dither colors in any of the current LDraw
specs (including the official parts restrictions). They somehow got dropped
(accidentally) from the LDraw 1.0 spec (they were in the LDraw 0.27 spec). I
know that they were dropped accidentally because I was a member of the LSC that
ratified the LDraw 1.0 spec, and "dither" and "dithered" were never once
mentioned in the discussions that ratified that.
Having said that, they are used in a number of official parts, they are used in
parts on the tracker, and as such they have to be considered to be implicitly
allowed.
> Even so I was in the assumption that I didn't create any special colors, but
> I toulk them over from some
> old spec where these colors where mentioned.
I'm guessing you took them from the behavior of ldraw.exe. They were supported
there, so you supported them. Having said that, despite their lack of
up-to-date documentation, they are required by official parts.
Because of this, I would strongly recommend using the old dither algorithm for
the default color of all colors in the 256-511 color number region. Entries in
LDConfig.ldr would then override these default colors. Please note that entries
in this region are designed to be similar to the original dither color. The
color numbers were picked so that software that didn't support LDConfig.ldr
would produce similar output.
> I got confused about this discussion with colors anyway - but here is my
> opinion:
> - MLCad should not automatically provide any none standard colors
> - But maybe we should have a look at the ldconfig.ldr file and check wether
> we realy got all colors or if we are missing some ...
The LSC is strongly opposed to non-brick colors going into LDConfig.ldr (with a
few exceptions). This hasn't been ratified as a requirement yet, but it almost
certainly will be. Patterned parts require non-brick colors, and up until now
that has been accomplished mainly with "dither" colors.
--Travis
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Message has 3 Replies:
 | | Re: *** MLCad V3.30 ***
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| "Travis Cobbs" <tcobbs@REMOVEgmail.com> schrieb im Newsbeitrag news:Kxn3yE.p2D@lugnet.com... (...) So I will take over parts of the build in color table in the range of 256 to 511. During this step the programm will convert these dittered colors (...) (15 years ago, 10-Feb-10, to lugnet.cad.mlcad)
| | | Re: *** MLCad V3.30 ***
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| (...) I can confirm that. While the LSC may have dithered over the spec, we certainly didn't drop "dither" intentionally. (Mind you, given the number of referenced specs we had to ratify first before we could get onto "the biggie", I'm surprised we (...) (15 years ago, 10-Feb-10, to lugnet.cad.mlcad)
| | | Re: *** MLCad V3.30 ***
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| (...) I've been surprised by some of this discussion of dithered colors, because when Foundry was created (not by me), it was done as a "clean room" project, based entirely off of specs, so it's the closest thing out there to a reference parser, and (...) (15 years ago, 11-Feb-10, to lugnet.cad.mlcad)
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Message is in Reply To:
| | Re: *** MLCad V3.30 ***
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| Hello Don, (...) I thought the LDraw group doesn't allow any other colors than the standard ones? Even so I was in the assumption that I didn't create any special colors, but I toulk them over from some old spec where these colors where mentioned. I (...) (15 years ago, 10-Feb-10, to lugnet.cad.mlcad)
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