diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_vector.c')
-rw-r--r-- | source/blender/blenlib/intern/math_vector.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/source/blender/blenlib/intern/math_vector.c b/source/blender/blenlib/intern/math_vector.c index 47deb705def..ce9896b99cc 100644 --- a/source/blender/blenlib/intern/math_vector.c +++ b/source/blender/blenlib/intern/math_vector.c @@ -112,8 +112,12 @@ void mid_v3_v3v3(float v[3], const float v1[3], const float v2[3]) /********************************** Angles ***********************************/ /* Return the angle in radians between vecs 1-2 and 2-3 in radians - If v1 is a shoulder, v2 is the elbow and v3 is the hand, - this would return the angle at the elbow */ + * If v1 is a shoulder, v2 is the elbow and v3 is the hand, + * this would return the angle at the elbow. + * + * note that when v1/v2/v3 represent 3 points along a straight line + * that the angle returned will be pi (180deg), rather then 0.0 + */ float angle_v3v3v3(const float v1[3], const float v2[3], const float v3[3]) { float vec1[3], vec2[3]; |