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 26dd608..b2ba551 100644 --- a/libdimension/dimension/geometry.h +++ b/libdimension/dimension/geometry.h @@ -170,6 +170,13 @@ dmnsn_new_matrix4(dmnsn_vector a, dmnsn_vector b, dmnsn_vector c, return m; } +/** Extract column vectors from a matrix. */ +DMNSN_INLINE dmnsn_vector +dmnsn_matrix_column(dmnsn_matrix M, unsigned int i) +{ + return dmnsn_new_vector(M.n[0][i], M.n[1][i], M.n[2][i]); +} + /** Return the identity matrix. */ dmnsn_matrix dmnsn_identity_matrix(void); |