Subject:
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Re: Some secrets of MLCad revealed ...
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Newsgroups:
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lugnet.cad.mlcad
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Date:
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Mon, 7 Jul 2003 01:03:41 GMT
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Viewed:
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3866 times
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In lugnet.cad.mlcad, Damien Guichard wrote:
> In lugnet.cad.mlcad, Michael Lachmann wrote:
> > "Damien Guichard" <damien.guichard@wanadoo.fr> schrieb im Newsbeitrag
> > news:HHKMxB.225G@lugnet.com...
> > <SNIP>
> > > Thanks Michael.
> > > So, at loading time, each added point has to be compared to all points in the
> > > point list. Does this impact the loading time of big parts or big models in a
> > > significant manner? Or is it only minor slowdown?
> > >
> > > Regards,
> > >
> > > Damien
> >
> > So far I could find out, it doesn't effect loading much, I think it was
> > something about 10% less then without this feature. I must say, I haven't
> > tried using hash algorythms to find the point more quickly, but so far I
> > remember there is an average of arround 400 points in a file, and search for
> > an 12 byte value is not so hard ...
> >
> > Michael
>
> Ok, the practical figures relativize the problem for everyday use.
> Thanks Michael.
>
> For the sake of sharing here is how I imagine a sorted point list.
<snip>
Cool! Should perform a lot faster on searching I would expect
400 points? That seems low to me. Most of my models have more than that many
elements! Even with shared vertices that seems low.
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Message has 1 Reply:
 | | Re: Some secrets of MLCad revealed ...
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| (...) I guess points are shared only on a part basis, not on a model basis. So, 400 distinct points for a part is already a fair number. Thus I think the sorting technique I discuss is not candidate for implementation unless the ldraw library goes (...) (21 years ago, 7-Jul-03, to lugnet.cad.mlcad)
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Message is in Reply To:
| | Re: Some secrets of MLCad revealed ...
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| (...) Ok, the practical figures relativize the problem for everyday use. Thanks Michael. For the sake of sharing here is how I imagine a sorted point list. The sorted list is also implemented as an array, so points can be accessed by index for (...) (21 years ago, 7-Jul-03, to lugnet.cad.mlcad)
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