Math Lib: Add closest_to_plane helper functions

- closest_to_plane3 (for float3 planes)
- closest_to_plane*_normalized_v3 (for unit length planes)

Use when the plane is known to be unit length

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/editors/object/object_vgroup.c b/source/blender/editors/object/object_vgroup.c
index d52031ecc03..d7de3db5e5d 100644
--- a/source/blender/editors/object/object_vgroup.c
+++ b/source/blender/editors/object/object_vgroup.c
@@ -1213,8 +1213,8 @@ static void getVerticalAndHorizontalChange(const float norm[3], float d, const f
 
 	plane_from_point_normal_v3(plane, coord, norm);
 
-	closest_to_plane_v3(projA, plane, start);
-	closest_to_plane_v3(projB, plane, end);
+	closest_to_plane_normalized_v3(projA, plane, start);
+	closest_to_plane_normalized_v3(projB, plane, end);
 	/* (vertical and horizontal refer to the plane's y and xz respectively)
 	 * vertical distance */
 	dists[index] = dot_v3v3(norm, end) + d;