Scarfski/filament
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4 Commits

Author SHA1 Message Date
Philip Rideout
64c5f5aee7 Deprecate populateTangentQuaternions. 2019-09-23 12:09:37 -04:00
Philip Rideout
ce50ea17c0 Avoid NaN when normal is colinear with fake axis. 
I reproduced the issue by hacking our redball demo and visually
verified the fix.

cc @AdrianAtGoogle
 2019-03-12 14:30:25 -07:00
Philip Rideout
ace38eff24 SurfaceOrientation cleanup per code review. 2019-02-27 08:47:24 -08:00
Philip Rideout
6d1e0ed6f4 Introduce SurfaceOrientation helper class. 
This moves our existing VertexBuffer utility into a new "geometry"
library and adds new functionality for computing tangents based on UV's.
The UV-based method comes from Eric Lengyel.

We considered mikktspace (which thankfully has a zlib-style license) but
it would require re-indexing via meshoptimizer and is therefore a bit
heavyweight.

The new library has no dependencies and will add only 7 KB to Filament's
Android aar file.

Fixes #858 and preps for #528.
 2019-02-27 08:47:24 -08:00