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After digging around for about a hour on Lego CAD websites, I'm completely
stumped as to what a Leog "unit" translates into as far as real world units
go (i.e. inches, millimeters, etc.) can anyone help me? Thanks
-Orion
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In lugnet.cad, Orion Pobursky writes:
> After digging around for about a hour on Lego CAD websites, I'm completely
> stumped as to what a Leog "unit" translates into as far as real world units
> go (i.e. inches, millimeters, etc.) can anyone help me? Thanks
I'm not 100% sure, but if you mean the centre to centre spacing of the studs
(and hence, the approximate width of a 1x1 plate/brick) they're either 8mm
or 5/16 of an inch (despite being from Canada, I'm inclined to believe 5/16"
is more accurate, since the rest of LEGO dimensions work out better with
5/16 as a base unit (often called 1 stud length)).
Working from this we get:
1 brick height = 6/16" / 9.6mm
1 plate thickness = 2/16" / 3.2mm
Does that help?
Mark W.
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That's a pretty straightforward calculation if you know the dimensions of a
Lego piece. However, actually measuring Lego parts doesn't give very even
measurements in either inches or millimeters. Note that a plate is 8 LDU
thick and that a 1-stud brick is 20 LDU across.
I traditionally use 1/8" per plate thickness to estimate measurements.
Using 2.5 plates thick per stud, that puts a 32x32 baseplate at exactly 10".
However, measuring a baseplate (with bricks at the ends to make up for the
fact that a baseplate is actually smaller than that many studs of bricks)
gives what appears to be exactly 10 1/16 inch. This isn't very satisfactory
as even numbers go, but it is off by less than 1%. So .125" is a nice
number, but a more accurate inch measurement would be .12578125" per plate.
Divide that by 8 to get .015722656" per LDU. Or 63.60248447 LDU per inch.
Metric measurements aren't terribly even either- the same 32 studs is 255
mm. It appears to be dead on at 255 mm, and is clearly NOT 256 mm. This is
too bad for those who like simple numbers, because 256 would make a very
nice even number of 8mm per stud (3.2mm per plate and .4mm per LDU). Run
the calculations to get 640 LDU per 255 mm. This is .3984375 mm/LDU. Or
2.509804 LDU/mm.
If you can handle a small amount of inaccuracy then .4mm/LDU or 1/64"/LDU
are useful.
--
Tony Hafner
www.hafhead.com
In lugnet.cad, Orion Pobursky writes:
> After digging around for about a hour on Lego CAD websites, I'm completely
> stumped as to what a Leog "unit" translates into as far as real world units
> go (i.e. inches, millimeters, etc.) can anyone help me? Thanks
>
> -Orion
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I was actually looking for a viable conversion so I can start designing
parts in Rhino. Right now all my peices are huge so I want a coversion
factor to scale my renders for use in MLCAD
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In lugnet.cad, Orion Pobursky writes:
> I was actually looking for a viable conversion so I can start designing
> parts in Rhino. Right now all my peices are huge so I want a coversion
> factor to scale my renders for use in MLCAD
I have a calculator that I just made that converts LDU(LDraw Units) to
inches and mm (plus a few other functions).
http://www.geocities.com/pneaster/lcad_util.htm#calculator
Paul
http://www.geocities.com/pneaster/lego_index.htm (Main Ldraw Index)
http://www.geocities.com/pneaster/lego_parts.htm (Finished parts)
http://www.geocities.com/pneaster/lego_todo.htm (In process)
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I've got a program that calculates that somewhere, in fact it should be at
my website, http://matt.rapturesoft.com if not I'll get it on my lego page
which should be up pretty soon.
-Matt
http://matt.rapturesoft.com
Orion <pobursky@hotmail.com> wrote in message news:G7A7Ex.E3I@lugnet.com...
> After digging around for about a hour on Lego CAD websites, I'm completely
> stumped as to what a Leog "unit" translates into as far as real world • units
> go (i.e. inches, millimeters, etc.) can anyone help me? Thanks
>
> -Orion
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In lugnet.cad, Orion Pobursky writes:
> After digging around for about a hour on Lego CAD websites,
> I'm completely stumped as to what a Leog "unit" translates into
> as far as real world units go (i.e. inches, millimeters, etc.)
> can anyone help me? Thanks
According to the Lego FAQ, the ubiquitous 2x4 brick
is one and a quarter inches long (1.25").
Since's it's four studs long, it's also got a length of 80 (4x20)
LDraw units (LDU). Thus, 80 LDU equals 1.25 inches. Or,
80 LDU = 1.25" = (5/4)"
Dividing both sides by 80, and simplifying the equation,
gives us
1 LDU = (5/320)" = (1/64)"
Thus, one LDraw "unit" is one sixty-fourth of an inch.
Thus, a plate (8 LDU "thick") has a thickness (height)
of 1/8 inch, and a brick has a height of 3/8 inch.
Hope this helps,
Franklin
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