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In lugnet.cad.dat.parts Steve Bliss wrote...
> [this should go to either lugnet.cad.dat.parts.primitives, or
> lugnet.cad.dev, but tight is the grip of inertia...]
Yup... :)
> In lugnet.cad.dat.parts, Don Rogerson wrote:
>
> > 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
>
> That seems a bit thin for the walls. I'll dig out some DUPLO bricks, and
> look at them more closely.
>
> > > 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
>
> Hmm. That's a height of 9.6LDU. Could we round that to 10, or would that
> be way off?
>
> > > 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.
>
> If we simply want to scale existing p-files, then I'd prefer not to make
> new p-files, but simply do the scaling in the parts files. Unless there's
> some compelling reason to do otherwise.
There is:
Primitive substitution!
I found out that we (mis)use stud4.dat by scaling its height by 5 in bricks!
(and other factors in other parts)
If I add a rounded edge to stud4.dat, it looks OK on plates,
but silly on bricks - the rounding gets elongated (steep)!
LGEO uses lg_plate_cylinder and lg_brick_cylinder
and we should use two different studs in LDraw too.
Primitive primitives (grin) like cylinders, discs, rings, cones and spheres
are OK to be scaled, but studs and axleholes etc. should never be scaled
- or they cannot be substituted correctly...
/Lars
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Message is in Reply To:
 | | 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 (...) (23 years ago, 2-Jan-01, to lugnet.cad.dat.parts)
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