Add invert functionality to mat3 (3x3) matrices#32

Merged

ungerik merged 1 commit intoungerik:masterfrom chran554:master

Mar 5, 2022

+503-20

Commits on Mar 5, 2022

Add invert functionality to mat3 (3x3) matrices (both float64 and float32 version). Most functionality copied from/based on mat4 library. Fix bug in float64 mat3 MulVec3. Add tests for mat3.
chran554
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