Work at SourceForge, help us to make it a better place! We have an immediate need for a Support Technician in our San Francisco or Denver office.

Close

#14 Pause during model change due to smooth-side calculations

v1.0_(example)
open
Ben Supnik
None
6
2014-04-06
2014-04-06
Ben Supnik
No

Performance bug introduced by 3.0 and the new rendering engine: the rendering engine lazily computes smoothed VBOs on demand when a part is drawn, and the smooth is done on a full-library-part basis.

The result is that when we change MPD submodels and a large number of parts are drawn for the first time, there can be significant delay (Seconds) before the screen updates.

I would say this is not a stop-ship for 3.0, particularly since fixing it requires significant re-architecture of the part library, which is well beyond our remaining risk profile for 3.0.

The fix is to allow cached smoothing of sub-parts; doing so will significantly reduce smoothing computational cost.

(A hack would also be to force-draw every single part in the model once on load, to 'warm' the entire model.)

Discussion