Subject:
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Re: [LSC] Colour Definition meta-statement
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 21 Jan 2004 06:30:04 GMT
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Viewed:
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1724 times
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I'll bite. (Note that none of my comments are meant as criticism.)
In lugnet.cad.dev, Steve Bliss wrote:
<SNIP>
> Numeric parameters may be specified in decimal or hexidecimal.
> Hexidecimal values must be prefixed with #.
I personally think the # for hex numbers is a mildly bad idea. The currently
accepted way to specify hexidecimal values is to prefix them with 0x. While I
admit this comes from C, and may not make a lot of sense to users, the
ldlite/L3P extended colors that people may already be familiar with use this
format (the L3P superset is described at
http://www.hassings.dk/l3/l3p.html#extcol). For that matter, it wouldn't
surprise me if 0x10 was accepted as color number 16 in LDraw itself, although it
would also not surprise me if it wasn't accepted.
<SNIP>
> EDGE e - The contrasting edge color. e may be either a color code or an RGB
> value. EDGE is a required element.
How do we tell if it is a color code or an RGB value? They're both numbers,
with no distinguishing characterstics that I can see.
<SNIP>
> DITHER d - Specifies the color should be dithered, and provides the second
> color value. d may be either a color code or an RGB value. DITHER is optional.
Same question as with the edge color.
<SNIP>
> CHROME - A flag indicating that surfaces should have a mirror-like finish.
> Not currently used by LDraw-compatible programs, but may be implemented in the
> future. CHROME is optional, and may not appear with METALLIC, RUBBER or
> MATERIAL.
>
> METALLIC - A flag indicating that surfaces should have a finish like Lego's
> 'metallic' colors. These colors are commonly called 'pearlescent' by fans. Not
> currently implemented in LDraw-compatible programs. METALLIC is optional, and
> may not appear with the CHROME, RUBBER or MATERIAL.
Shouldn't we have a pre-set material name for electrical contacts and train
rails (or perhaps even one for each)? I don't think they fit either chrome or
metallic, since metallic is described as being designed for the fake-metal
finish. Speaking of which, we might consider a different name for this material
name, since LEGO does have parts with metallic bits, and the current name may
cause confusion. Thinking a little more about the electrical contacts, they are
probably close enough to chrome to simply use the chrome material.
Note that I don't think it's a good idea to have too many pre-set material
types, but I do think it's a bad idea to not have a pre-defined type that
applies to train rails.
--Travis Cobbs
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Message has 2 Replies:
Message is in Reply To:
 | | [LSC] Colour Definition meta-statement
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| Here's the initial write up for a color definition meta-statement, to be used in ldconfig.ldr and in any model file. The LSC has a couple of outstanding issues with this spec, let's discuss those in follow-up messages. Please respond with any (...) (20 years ago, 21-Jan-04, to lugnet.cad.dev)
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