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| author | Tavian Barnes <tavianator@gmail.com> | 2010-10-26 15:42:13 -0400 |
|---|---|---|
| committer | Tavian Barnes <tavianator@gmail.com> | 2010-10-26 15:42:13 -0400 |
| commit | 0075e0c37d9c33ed00e4308e6444b61b204327ba (patch) | |
| tree | 4c112619d917fc8374715bde8ce4e4f0e6723892 /libdimension/dimension/geometry.h | |
| parent | 1fba91c6fe9115be67929ce1e247dd759a21fcd1 (diff) | |
| download | dimension-0075e0c37d9c33ed00e4308e6444b61b204327ba.tar.xz | |
Add numerical polynomial solver based on Uspensky's algorithm.
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 |