diff options
author | Campbell Barton <ideasman42@gmail.com> | 2015-04-27 14:50:38 +0300 |
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committer | Campbell Barton <ideasman42@gmail.com> | 2015-04-27 14:52:42 +0300 |
commit | 9dadc8f599da94c3120f24f198c606d011a5dda2 (patch) | |
tree | c3bbf77dbd565dc896895fb252f2a05ea5184a9e /source | |
parent | 3f80accfb34dd10e70380139941bcaf62702a6f8 (diff) |
Math Lib: add mul_v3_mat3_m4v3
Diffstat (limited to 'source')
-rw-r--r-- | source/blender/blenlib/BLI_math_matrix.h | 1 | ||||
-rw-r--r-- | source/blender/blenlib/intern/math_matrix.c | 10 |
2 files changed, 11 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_math_matrix.h b/source/blender/blenlib/BLI_math_matrix.h index 45972d03175..f7eeb1ec7a1 100644 --- a/source/blender/blenlib/BLI_math_matrix.h +++ b/source/blender/blenlib/BLI_math_matrix.h @@ -106,6 +106,7 @@ void mul_v2_m4v3(float r[2], float M[4][4], const float v[3]); void mul_v2_m2v2(float r[2], float M[2][2], const float v[2]); void mul_m2v2(float M[2][2], float v[2]); void mul_mat3_m4_v3(float M[4][4], float r[3]); +void mul_v3_mat3_m4v3(float r[3], float M[4][4], const float v[3]); void mul_m4_v4(float M[4][4], float r[4]); void mul_v4_m4v4(float r[4], float M[4][4], const float v[4]); void mul_project_m4_v3(float M[4][4], float vec[3]); diff --git a/source/blender/blenlib/intern/math_matrix.c b/source/blender/blenlib/intern/math_matrix.c index 1b4bbafdb04..773bb419c9b 100644 --- a/source/blender/blenlib/intern/math_matrix.c +++ b/source/blender/blenlib/intern/math_matrix.c @@ -504,6 +504,16 @@ void mul_mat3_m4_v3(float mat[4][4], float vec[3]) vec[2] = x * mat[0][2] + y * mat[1][2] + mat[2][2] * vec[2]; } +void mul_v3_mat3_m4v3(float r[3], float mat[4][4], const float vec[3]) +{ + const float x = vec[0]; + const float y = vec[1]; + + r[0] = x * mat[0][0] + y * mat[1][0] + mat[2][0] * vec[2]; + r[1] = x * mat[0][1] + y * mat[1][1] + mat[2][1] * vec[2]; + r[2] = x * mat[0][2] + y * mat[1][2] + mat[2][2] * vec[2]; +} + void mul_project_m4_v3(float mat[4][4], float vec[3]) { const float w = mul_project_m4_v3_zfac(mat, vec); |