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 CAD / Development / Organizations / LDraw / 4612
4611  |  4613
Subject: 
Re: Color page updated
Newsgroups: 
lugnet.cad.dev.org.ldraw
Date: 
Wed, 2 Dec 2009 21:00:45 GMT
Viewed: 
15839 times
  
In lugnet.cad.dev.org.ldraw, Andrew Westrate wrote:
I apparently have missed the discussion when it comes to certain colors are
suddenly "not supported," but I'd like to register my opinion on it.

It is a huge error to be calling colors in the ranges of 32-47 and 256-511 as
"MLCad color codes" or to somehow suggest that they shouldn't be considered
valid just because they don't show up in the LDConfig.ldr file.  As I understand
it, the original LDraw executable defined the following colors:

0 - 15 : prefined set of common part colors
16, 24 : main color, edge color
32 - 47 : the  0 - 15 set of colors, but rendered as transparent (i.e. just
adding 32 to first set)
256 - 511 : dithered colors; these are the main set of colors combined with
each other to form a broader color palette.  This is described at the bottom of
this page: http://www.ldraw.org/OLD/reference/specs/colors.shtml

This has nothing to do with MLCad, except that MLCad supported the original
LDraw's usage of these colors.

Over time, some of the dithered colors were redefined by convention, so that
black+black (256) became black rubber, white+white (511) became white rubber,
yellow+yellow (494) became electrical contact metal.  Eventually the LDConfig
file was created and these were formalized.

In my opinion, just because some of these colors didn't make it into the config
file, that doesn't mean they're not valid, because

  A) we have always tried to maintain backwards compatibility, and
  B) we have to allow not only for the color of molded plastic and rubber
pieces, but also all the colors of printed parts.  There are far more shades of
paint colors used on printed parts then there will ever be of ABS plastic, and
as long as we do patterns as quads and triangles, we have to have a big enough
color palette to accomodate that.


So, how about we just add the missing transparent and dithered colors to the
config file?

Andy

Although I have decided to refrain from participation in this thread (you
already know my position and you totally neglect it), I make one exception and
say "Amen!" to all of Andy's points above.

/Tore



Message is in Reply To:
  Re: Color page updated
 
(...) I apparently have missed the discussion when it comes to certain colors are suddenly "not supported," but I'd like to register my opinion on it. It is a huge error to be calling colors in the ranges of 32-47 and 256-511 as "MLCad color codes" (...) (14 years ago, 2-Dec-09, to lugnet.cad.dev.org.ldraw)

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