Subject:
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Re: colors completeness
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Newsgroups:
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lugnet.cad
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Date:
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Sat, 3 Mar 2007 17:07:13 GMT
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Viewed:
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1845 times
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In lugnet.cad, Lutz Uhlmann wrote:
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Hi,
I have some questions about all those colors.
I am using BrickSmith on Mac, I do not know if MLCAD does offer more colors.
Bricksmith is missing the newer transparent dark orange and medium blue colors
and some rarely used solid ones as bluish light grey, maersk blue, medium
blue, light lime, very light orange, flesh tones.
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I think it would be nice if Bricksmith read the ldconfig.ldr file to load color
definitions, or if it offered a pane in the preferences or color picker to
define new colors. Best of all, if it had an interface like that to read and
update ldconfig.ldr.
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I did a model containing all colors in BrickSmith:
http://www.brickshelf.com/gallery/LGEO/colors/picture3.png
you can download the model file:
http://www.brickshelf.com/gallery/LGEO/colors/colors.ldr
Exported with L3P and the LGEO option, it renders like this:
http://www.brickshelf.com/gallery/LGEO/colors/colors.png
Lost by the conversion are the pearl colors (upper corner), new bluish greys
and reddish brown. very light grey becomes chrome silver and dark orange
renders chrome gold.
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I’ve noticed the same problem when trying to render some of my models, where L3P
does not recognize the newer color code and uses default gray instead. Unless it
is possible to make L3P read ldconfig.ldr as well, I think the only solution is
to replace the color codes it doesn’t know with hexadecimal color
specifications. For example, replace 134 (Pearl Copper) with 0x02938767,
where 938767 is the RRGGBB color for Pearl Copper defined in ldconfig.ldr
and 0x02 is the opaque prefix described in
this post (0x03 gives transparent
colors). I use this format to get truecolor in Bitsticker. I have also
considered writing a filter script to translate any of these unknown color codes
to hex colors so that they can be rendered accurately with L3P and POVray.
Incidentally, have you noticed that only parts listed earlier in the file are
visible through transparent parts in Bricksmith? I’m not sure if this is
conventional LDraw behavior or if it is just due to how Bricksmith renders
things, but when possible I have started putting transparent parts (such as
canopies and windows) as the last parts in the file just so I can be sure to see
everything through them. I posted simple examples
here and
here.
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Is there any comittee organizing colors? I think we should have a list where
each color ever produced (best source for color catalog is BrickLink, I think)
is assigned to a color number? This would help programmers of the CAD programs
as the users when using more uncommon colors. (Ok, the discussion of color
names itself is an issue of its own...)
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I think this is a good point. I like to use actual part colors as much as
possible when modeling in LDraw, but I’ve found the support for different colors
to vary from tool to tool. Something like ldconfig.ldr seems like a good place
to make standard colors definition that can be updated regularly without
requiring separate program updates. In fact it is described in the
color extension specification, so it seems
like a reasonable basis for this idea. If support for this file is widespread
(I’m not sure if it is), I suppose the question is how are additions to this
file approved and distributed? Perhaps this is answered elsewhere, but I ask in
order to emphasize Lutz’ point that in reality there is a lot of variation in
how colors (as hue definitions - I’m not so concerned with names) are handled
throughout the LDraw system.
Jim
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Message is in Reply To:
 | | colors completeness
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| Hi, I have some questions about all those colors. I am using BrickSmith on Mac, I do not know if MLCAD does offer more colors. Bricksmith is missing the newer transparent dark orange and medium blue colors and some rarely used solid ones as bluish (...) (18 years ago, 3-Mar-07, to lugnet.cad)
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