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Diffstat (limited to 'indra/llmath/v2math.cpp')
| -rw-r--r-- | indra/llmath/v2math.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/indra/llmath/v2math.cpp b/indra/llmath/v2math.cpp index 59e6d947ca..175f08df88 100644 --- a/indra/llmath/v2math.cpp +++ b/indra/llmath/v2math.cpp @@ -66,6 +66,13 @@ F32 angle_between(const LLVector2& a, const LLVector2& b) return angle; } +F32 signed_angle_between(const LLVector2& a, const LLVector2& b) +{ + F32 angle = angle_between(a, b); + F32 rhombus_square = a[VX] * b[VY] - b[VX] * a[VY]; + return rhombus_square < 0 ? -angle : angle; +} + bool are_parallel(const LLVector2& a, const LLVector2& b, F32 epsilon) { LLVector2 an = a; |