add inline functions getting a single axis from mul_m3_v3()

2 files changed, 15 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_math_vector.h b/source/blender/blenlib/BLI_math_vector.h
index 304e2ea7fde..6be679a90b6 100644
--- a/source/blender/blenlib/BLI_math_vector.h
+++ b/source/blender/blenlib/BLI_math_vector.h
@@ -116,6 +116,9 @@ MINLINE void mul_v3_v3v3(float r[3], const float a[3], const float b[3]);
 MINLINE void mul_v4_fl(float r[4], float f);
 MINLINE void mul_v4_v4fl(float r[3], const float a[3], float f);
 MINLINE float mul_project_m4_v3_zfac(float mat[4][4], const float co[3]);
+MINLINE float mul_m3_v3_single_x(float M[3][3], const float a[3]);
+MINLINE float mul_m3_v3_single_y(float M[3][3], const float a[3]);
+MINLINE float mul_m3_v3_single_z(float M[3][3], const float a[3]);
 
 MINLINE void madd_v3_v3fl(float r[3], const float a[3], float f);
 MINLINE void madd_v3_v3v3(float r[3], const float a[3], const float b[3]);
diff --git a/source/blender/blenlib/intern/math_vector_inline.c b/source/blender/blenlib/intern/math_vector_inline.c
index d77b1ecf017..eff735ef8d5 100644
--- a/source/blender/blenlib/intern/math_vector_inline.c
+++ b/source/blender/blenlib/intern/math_vector_inline.c
@@ -418,6 +418,18 @@ MINLINE float mul_project_m4_v3_zfac(float mat[4][4], const float co[3])
 	       (mat[2][3] * co[2]) + mat[3][3];
 }
 
+MINLINE float mul_m3_v3_single_x(float M[3][3], const float a[3])
+{
+	return M[0][0] * a[0] + M[1][0] * a[1] + M[2][0] * a[2];
+}
+MINLINE float mul_m3_v3_single_y(float M[3][3], const float a[3])
+{
+	return M[0][1] * a[0] + M[1][1] * a[1] + M[2][1] * a[2];
+}
+MINLINE float mul_m3_v3_single_z(float M[3][3], const float a[3])
+{
+	return M[0][2] * a[0] + M[1][2] * a[1] + M[2][2] * a[2];
+}
 
 MINLINE void madd_v2_v2fl(float r[2], const float a[2], float f)
 {