Welcome! Log In Create A New Profile

Advanced
Re: T-Junctions re-visited
avatarMarch 18, 2013 11:05PM
That's really a tough call. However, LDView's existing curve smoothing takes up a significant fraction of the load time for any given model. I just did tests with a 10179 Millennium Falcon model, and when I turned curve smoothing off, the model loaded in around 4.5 seconds. When I turned curve smoothing on, it took around 15 seconds. In both cases I was starting from a freshly launched LDView, so the application itself didn't have any caches. However, I had already loaded the model prior to the tests, so the disk cache almost certainly had all the parts in it.

My current curve smoothing code is based purely on detection of conditional lines between surfaces that are intended to be smooth, which is not something you are doing, and not something any other app is likely to do (since detection of edge lines to indicate creases, along with an angle threshold, is almost certainly a better solution).

My curve smoothing takes even longer if primitive substitution is disabled in LDView, because LDView then has to do curve detection and smoothing on curved primitives. With primitive substitution enabled, curve smoothing is completely skipped for primitives, since they already have accurate surface normals.

If an app chooses to cache calculated things (like surface normals) to disk in an intelligent fashion, then that puts a much looser constraint on the required performance of the surface normal calculation algorithm. Having said that, intelligent caching isn't exactly a trivial feature to implement.

So, I'm not really sure what a good answer to your question is. However, 45 seconds seems like an awfully long time to load a single part (although that's mitigated by the fact that the vast majority of parts should take dramatically less time).
SubjectAuthorViewsPosted
T-Junctions re-visited Travis Cobbs586March 11, 2013 10:38PM
Re: T-Junctions re-visited Tim Gould261March 11, 2013 11:31PM
Re: T-Junctions re-visited Roland Melkert244March 12, 2013 11:17AM
Re: T-Junctions re-visited Ben Supnik249March 12, 2013 11:17AM
Re: T-Junctions re-visited Roland Melkert238March 12, 2013 11:22AM
Re: T-Junctions re-visited Ben Supnik236March 12, 2013 11:32AM
Re: T-Junctions re-visited Roland Melkert228March 12, 2013 11:41AM
Re: T-Junctions re-visited Ben Supnik239March 12, 2013 11:55AM
Re: T-Junctions re-visited Roland Melkert232March 13, 2013 10:08AM
Re: T-Junctions re-visited Travis Cobbs254March 13, 2013 11:27AM
Re: T-Junctions re-visited Allen Smith282March 12, 2013 02:01PM
Re: T-Junctions re-visited Michael Heidemann240March 13, 2013 09:27AM
Re: T-Junctions re-visited Ben Supnik240March 13, 2013 10:37AM
Re: T-Junctions re-visited Tim Gould232March 13, 2013 02:31PM
Re: T-Junctions re-visited Michael Heidemann229March 13, 2013 03:42PM
Re: T-Junctions re-visited Michael Heidemann218March 17, 2013 04:35AM
Re: T-Junctions re-visited Ben Supnik207March 17, 2013 08:43AM
Re: T-Junctions re-visited Michael Heidemann203March 17, 2013 08:59AM
Re: T-Junctions re-visited Ben Supnik217March 17, 2013 09:02AM
Re: T-Junctions re-visited Magnus Forsberg209March 17, 2013 09:15AM
Re: T-Junctions re-visited Travis Cobbs243March 17, 2013 10:09PM
Re: T-Junctions re-visited Ben Supnik233March 18, 2013 07:30AM
Re: T-Junctions re-visited Travis Cobbs246March 18, 2013 10:57AM
Re: T-Junctions re-visited Ben Supnik248March 18, 2013 11:27AM
Re: T-Junctions re-visited Travis Cobbs237March 18, 2013 12:23PM
Re: T-Junctions re-visited Ben Supnik253March 18, 2013 01:41PM
Re: T-Junctions re-visited Roland Melkert259March 18, 2013 02:51PM
Re: T-Junctions re-visited Travis Cobbs231March 18, 2013 02:59PM
Re: T-Junctions re-visited Roland Melkert244March 18, 2013 03:41PM
Re: T-Junctions re-visited Ben Supnik249March 18, 2013 06:09PM
Re: T-Junctions re-visited Roland Melkert245March 19, 2013 11:38AM
Re: T-Junctions re-visited Ben Supnik261March 19, 2013 11:43AM
Re: T-Junctions re-visited Roland Melkert284March 19, 2013 07:07PM
Re: T-Junctions re-visited Travis Cobbs254March 19, 2013 10:13PM
Re: T-Junctions re-visited Tim Gould243March 20, 2013 03:56AM
Re: T-Junctions re-visited Travis Cobbs227March 20, 2013 10:13AM
Re: T-Junctions re-visited Ben Supnik218March 20, 2013 10:23AM
Re: T-Junctions re-visited Travis Cobbs232March 20, 2013 10:29AM
Re: T-Junctions re-visited Travis Cobbs228March 20, 2013 10:26AM
Re: T-Junctions re-visited Ben Supnik212March 20, 2013 11:18AM
Re: T-Junctions re-visited Ben Supnik229March 20, 2013 06:42AM
Re: T-Junctions re-visited Roland Melkert234March 20, 2013 11:36AM
Re: T-Junctions re-visited Philippe Hurbain233March 20, 2013 06:36AM
Re: T-Junctions re-visited Ben Supnik235March 20, 2013 06:58AM
Re: T-Junctions re-visited Allen Smith239March 20, 2013 09:08AM
Re: T-Junctions re-visited Roland Melkert250March 20, 2013 11:35AM
Re: T-Junctions re-visited Ben Supnik619March 20, 2013 11:50AM
Re: T-Junctions re-visited Michael Heidemann250March 18, 2013 03:54PM
Re: T-Junctions re-visited Roland Melkert236March 13, 2013 10:03AM
Re: T-Junctions re-visited Tim Gould211March 13, 2013 03:56PM
Re: T-Junctions re-visited Sergio Reano215March 13, 2013 03:51PM
Re: T-Junctions re-visited Roland Melkert275March 13, 2013 04:36PM
Re: T-Junctions re-visited Tim Gould240March 13, 2013 05:10PM
Re: T-Junctions re-visited Ben Supnik221March 14, 2013 08:17PM
Re: T-Junctions re-visited Tim Gould280March 14, 2013 08:41PM
Re: T-Junctions re-visited Ben Supnik278March 15, 2013 10:56AM
Re: T-Junctions re-visited Roland Melkert234March 15, 2013 11:36AM
Re: T-Junctions re-visited Ben Supnik215March 13, 2013 06:58PM
Re: T-Junctions re-visited Roland Melkert224March 13, 2013 07:27PM
Re: T-Junctions re-visited Ben Supnik201March 13, 2013 07:37PM
Re: T-Junctions re-visited Roland Melkert219March 13, 2013 07:59PM
Re: T-Junctions re-visited Ben Supnik244March 13, 2013 08:18PM
Re: T-Junctions re-visited Travis Cobbs265March 14, 2013 03:23PM
Re: T-Junctions re-visited Roland Melkert272March 14, 2013 03:34PM
Re: T-Junctions re-visited Tim Gould286March 14, 2013 03:41PM
Re: T-Junctions re-visited Roland Melkert246March 15, 2013 11:33AM
Re: T-Junctions re-visited Tim Gould204March 13, 2013 07:43PM
Re: T-Junctions re-visited Roland Melkert219March 13, 2013 08:08PM
Re: T-Junctions re-visited Tim Gould217March 13, 2013 08:18PM
Re: T-Junctions re-visited Ben Supnik281March 14, 2013 08:15PM
Re: T-Junctions re-visited Roland Melkert265March 15, 2013 11:29AM
Re: T-Junctions re-visited Travis Cobbs241March 15, 2013 12:27PM
Re: T-Junctions re-visited Ben Supnik256March 15, 2013 05:08PM
Re: T-Junctions re-visited Travis Cobbs242March 16, 2013 11:29PM
Re: T-Junctions re-visited Ben Supnik203March 17, 2013 08:58AM
Re: T-Junctions re-visited Roland Melkert210March 17, 2013 12:35PM
Re: T-Junctions re-visited Travis Cobbs232March 18, 2013 12:28PM
Re: T-Junctions re-visited Travis Cobbs249March 18, 2013 12:32PM
Re: T-Junctions re-visited Roland Melkert249March 18, 2013 05:00PM
Re: T-Junctions re-visited Travis Cobbs271March 18, 2013 11:05PM
Re: T-Junctions re-visited Roland Melkert290March 19, 2013 11:38AM
Re: T-Junctions re-visited Sergio Reano280March 26, 2013 02:46PM
Re: T-Junctions re-visited Roland Melkert230March 27, 2013 11:19AM
Re: T-Junctions re-visited Sergio Reano284March 27, 2013 01:48PM



Sorry, only registered users may post in this forum.

Click here to login