diff options
Diffstat (limited to 'libdimension/dimension/geometry.h')
| -rw-r--r-- | libdimension/dimension/geometry.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libdimension/dimension/geometry.h b/libdimension/dimension/geometry.h index 87e7ab7..4c4f8b8 100644 --- a/libdimension/dimension/geometry.h +++ b/libdimension/dimension/geometry.h @@ -96,6 +96,13 @@ dmnsn_degrees(double radians) return radians*45.0/atan(1.0); } +DMNSN_INLINE int +dmnsn_signbit(double n) +{ + /* Guarantee a 1 or 0 return, to allow testing two signs for equality */ + return signbit(n) ? 1 : 0; +} + /* Shorthand for vector/matrix construction */ DMNSN_INLINE dmnsn_vector |