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Re: Looking for huge (mpd) models
March 02, 2013 12:14PM
Hi Roland,

I have a parking garage MOC - a single MPD file with 32 sub-sections that is currently 23,019 parts.

If you can accept a scene that is a collection of MPD files in single directory, the airport to which the garage belongs is currently 34,963 parts.

The garage renders at about 8 fps, and the whole airport renders at about 4.5 fps. On the same machine, Datsville (the version I have is around 39k parts?) runs at 5.5 fps.

Email me at bsupnik at gmail dot com and I can send them to you.

Re: performance, I found a few things with Bricksmith:

* A shader-based pipeline wasn't faster than fixed-function for the same basic work.
* CPU time is proportional to the number of bricks, not the number of vertices.
* When using the programmable pipeline and instancing techniques, BrickSmith is vertex-count bound, not CPU bound. It's not even close -- even with culling and transparent part sorting, I see CPU use of 15-25% while maxed out on fps with 30-40k parts. In this case the interesting number isn't the part count but the vertex count those parts yield. This is with a 4870 - a newer GPU would help the vertex-count bottleneck.

I wrote this up when I finished some perf measurements...

http://www.hacksoflife.blogspot.com/2013/01/instancing-for-bricksmith.html

cheers
Ben
SubjectAuthorViewsPosted
Looking for huge (mpd) models Roland Melkert1168January 08, 2013 10:15AM
Re: Looking for huge (mpd) models Travis Cobbs461January 08, 2013 10:38AM
Re: Looking for huge (mpd) models Roland Melkert393January 08, 2013 10:53AM
Re: Looking for huge (mpd) models Travis Cobbs391January 08, 2013 12:44PM
Re: Looking for huge (mpd) models Roland Melkert357January 08, 2013 01:15PM
Re: Looking for huge (mpd) models Attachments Michael Heidemann415January 09, 2013 09:00AM
Re: Looking for huge (mpd) models Roland Melkert331January 09, 2013 09:44AM
Re: Looking for huge (mpd) models Michael Heidemann357January 10, 2013 09:19AM
Re: Looking for huge (mpd) models Tim Gould304March 01, 2013 01:12PM
Re: Looking for huge (mpd) models Michael Heidemann269March 01, 2013 01:44PM
Re: Looking for huge (mpd) models Tim Gould277March 01, 2013 01:47PM
Re: Looking for huge (mpd) models Michael Heidemann307March 01, 2013 03:33PM
Re: Looking for huge (mpd) models Attachments Jaco van der Molen327March 01, 2013 05:15AM
Re: Looking for huge (mpd) models Roland Melkert351March 01, 2013 09:20AM
Re: Looking for huge (mpd) models Jaco van der Molen264March 04, 2013 04:56AM
Re: Looking for huge (mpd) models Roland Melkert240March 04, 2013 10:17AM
Re: Looking for huge (mpd) models Ben Supnik284March 02, 2013 12:14PM
Re: Looking for huge (mpd) models Roland Melkert292March 02, 2013 02:02PM
Re: Looking for huge (mpd) models Ben Supnik282March 02, 2013 05:35PM
Re: Looking for huge (mpd) models Roland Melkert260March 03, 2013 10:16AM
Re: Looking for huge (mpd) models Ben Supnik262March 03, 2013 06:00PM
Re: Looking for huge (mpd) models Roland Melkert219March 04, 2013 10:24AM
Re: Looking for huge (mpd) models Travis Cobbs455March 04, 2013 10:47AM



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