Subject:
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Re: Duplo parts?
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Newsgroups:
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lugnet.cad.dat.parts
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Date:
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Thu, 28 Dec 2000 19:09:03 GMT
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Viewed:
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1753 times
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>
> > Comparing relative sizes with some of my son's Duplo bricks last night,
> > it looks like the Duplo studs are a little shorter in height than two
> > Lego studs.
I should have said the Duplo studs are a little _taller_ than two Lego studs.
The number I came up with is 2.4 times the height of a lego stud.
>
> And the walls of the bottom tubes are certainly not twice as thick as on
> System parts...
I made up a 2x2 Duplo trial last night. I used the same wall thickness as Lego
bricks (4 units) and everything seemed to fit correctly
I left the depression out of the model
...
>
> I actually worked up a couple of sample Duplo parts last week, and found out
> how to work with primitives. The primitives I see as necessary are:
> Top stud (hollow with logo inside)
I made one if these following Steve's suggestion. the primitive file simply
points to the stud2 primitive, doubling the x and z and multiplying the y by 2.4
> Bottom tube
> (and it would be nice if it had the "flattened corners" on the inside)
I did the same for this, but simply doubled the regular bottom stud. The
flattened portions are newer, and are not on the older Duplo bricks. I left them
off.
> Big stud (for seats)
> "rib" between tube and side and between tubes
> "rib" along wall to bind to studs
These I modeled using the box.dat primitive as a 3x4x43 box with edges. Would
there be an advantage to having a separate primitive? (actually, would there
need to be two each? The inner ribs have two orientations)
>
> And another question: What about the edges? System parts have pretty crisp
> corners, but Duplo parts are very noticeably curved on the edges. Is this a
> reasonable thing to model?
Modeling the curved edges would be possible, but it would mean that the current
box*.dat primitive couldn't be used. A new one would be needed that draws a cube
with rounded edges and corners.
>
> --
> Tony Hafner
> www.hafhead.com
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Message has 1 Reply:
 | | Re: Duplo parts?
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| [this should go to either lugnet.cad.dat.parts...rimitives, or lugnet.cad.dev, but tight is the grip of inertia...] (...) That seems a bit thin for the walls. I'll dig out some DUPLO bricks, and look at them more closely. (...) Hmm. That's a height (...) (24 years ago, 2-Jan-01, to lugnet.cad.dat.parts)
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Message is in Reply To:
| | Re: Duplo parts?
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| (...) And the walls of the bottom tubes are certainly not twice as thick as on System parts. Note that the studs fit great between the bottom tubes, but they don't bind *at all* when placed inside the tubes. There is another type of stud that fits (...) (24 years ago, 28-Dec-00, to lugnet.cad.dat.parts)
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