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In lugnet.cad.dat.parts.primitives, Chris Dee wrote:
> In lugnet.cad.dat.parts.primitives, Steve Bliss writes:
> > Very true. In some cases (like the minifig arms), is it better to go
> > with an all-polygon approach, or to use primitives as much as possible
> > and fill in the rest with polygons?
>
> Are you suggesting that there is (should be) a command to prevent primitive
> substitution, or that the primitive should be inlined?
I wasn't thinking of either, really. I was wondering if maybe the part
should be modeled without any primitives at all. I suppose the
practical result of that would be primitive-inlining.
> Agreed. What I was more thinking of is the situation (in the minifig arm) where
> one region is an irregularly truncated cylinder (and it is not possible to use
> cyls.dat or cyls2.dat primitives). The fully circular section _can_ use a cyli
> primitive, but the extension up to the irregular intersection can only be coded
> as polygons. Take a look at the work-in-progress file at
> http://news.lugnet.com/cad/dat/parts/?n=3587 in LDView with primitive
> substitution on, and you should see what I mean. Actually some of these can be
> replaced with cyls primitives, but it illustrates the point.
In the case of the lower arm (forearm), I don't think the forearm is
cylindrical - I think there's always a slight conical angle.
But sticking to your point, if I was authoring the part, I'd either (a)
allow the forarm cylinder to intrude into the interior space at the
elbow intersection, or (b) inline the cylinder, and combine the entire
extent into a single set of polygons.
Steve
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Message is in Reply To:
 | | Re: ring 3 to 5
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| (...) have (...) Are you suggesting that there is (should be) a command to prevent primitive substitution, or that the primitive should be inlined? (...) Agreed. What I was more thinking of is the situation (in the minifig arm) where one region is (...) (23 years ago, 4-May-02, to lugnet.cad.dat.parts.primitives)
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