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Git Commits -> Revision e12c311
Revision e12c311 by Sybren A. Stüvel (master) April 14, 2017, 13:26 (GMT) |
Alembic import: greatly improved curve/hair import performance The U-resolution of the imported curves was kept at the default value of 12, which is way too high for imported hair. We export hair at a fairly high resolution already, so it's not needed to subdivide even further when importing. Of course this may have an impact on other curves that do require this U-resolution to be higher. In that case the resolution can be increased after importing. I removed the default nu->orderu = num_verts, as that allowed every point to influence the entire spline, which was more expensive for the CPU, and unlikely to be needed. The orderu computations had off-by-one errors in the curve importer, which are now also fixed. The correct values are: - Linear: orderu = 2 - Quadratic: orderu = 3 - Cubic: orderu = 4 These values are also what is stored in the Alembic file for curves of type kVariableOrder, according to the reference Maya exporter maya/AbcExport/MayaNurbsCurveWriter.cpp, function MayaNurbsCurveWriter::write(), in the Alembic source code. The result is a frame rate increase of roughly 100x (tested with one 100-hair test on one machine, so take with grain of salt). |
Commit Details:
Full Hash: e12c3110024dc4b62ffefa739288218b04e39f71
Parent Commit: 6af131f
Lines Changed: +13, -7
1 Modified Path:
/source/blender/alembic/intern/abc_curves.cc (+13, -7) (Diff)