Cleanup: Rearrange the order of isect_ray_ray_v3 parameters

And remove redundant add operation.

2 files changed, 4 insertions, 5 deletions

diff --git a/source/blender/blenlib/intern/math_geom.c b/source/blender/blenlib/intern/math_geom.c
index 8b715ebf87b..dbb4e0d3859 100644
--- a/source/blender/blenlib/intern/math_geom.c
+++ b/source/blender/blenlib/intern/math_geom.c
@@ -2826,12 +2826,12 @@ bool isect_ray_ray_v3(const float ray_origin_a[3],
   sub_v3_v3v3(c, n, t);
 
   if (r_lambda_a != NULL) {
-    cross_v3_v3v3(cray, c, ray_direction_a);
+    cross_v3_v3v3(cray, c, ray_direction_b);
     *r_lambda_a = dot_v3v3(cray, n) / nlen;
   }
 
   if (r_lambda_b != NULL) {
-    cross_v3_v3v3(cray, c, ray_direction_b);
+    cross_v3_v3v3(cray, c, ray_direction_a);
     *r_lambda_b = dot_v3v3(cray, n) / nlen;
   }
 
diff --git a/source/blender/editors/transform/transform_constraints.c b/source/blender/editors/transform/transform_constraints.c
index 208242d53b3..3a204d0d157 100644
--- a/source/blender/editors/transform/transform_constraints.c
+++ b/source/blender/editors/transform/transform_constraints.c
@@ -263,9 +263,8 @@ static void axisProjection(const TransInfo *t,
       /* Use ray-ray intersection instead of line-line because this gave
        * precision issues adding small values to large numbers. */
       float mul;
-      if (isect_ray_ray_v3(v, norm, t_con_center, axis, &mul, NULL)) {
-        madd_v3_v3v3fl(out, t_con_center, axis, mul);
-        sub_v3_v3(out, t_con_center);
+      if (isect_ray_ray_v3(t_con_center, axis, v, norm, &mul, NULL)) {
+        mul_v3_v3fl(out, axis, mul);
       }
       else {
         /* In practice this should never fail. */