fix error running ED_view3d_project_float_v3_m4 on 2d vec (thanks Sergey for pointing out!), also remove redundant vector copy in knife project.

2 files changed, 1 insertions, 2 deletions

diff --git a/source/blender/editors/mesh/editmesh_knife.c b/source/blender/editors/mesh/editmesh_knife.c
index 618ff6ce737..afd151f3c77 100644
--- a/source/blender/editors/mesh/editmesh_knife.c
+++ b/source/blender/editors/mesh/editmesh_knife.c
@@ -335,7 +335,6 @@ static KnifeVert *new_knife_vert(KnifeTool_OpData *kcd, const float co[3], const
 
 	copy_v3_v3(kfv->co, co);
 	copy_v3_v3(kfv->cageco, cageco);
-	copy_v3_v3(kfv->sco, co);
 
 	knife_project_v3(kcd, kfv->co, kfv->sco);
 
diff --git a/source/blender/editors/mesh/editmesh_knife_project.c b/source/blender/editors/mesh/editmesh_knife_project.c
index 8d385a7e6ff..f473939d0aa 100644
--- a/source/blender/editors/mesh/editmesh_knife_project.c
+++ b/source/blender/editors/mesh/editmesh_knife_project.c
@@ -89,7 +89,7 @@ static LinkNode *knifeproject_poly_from_object(ARegion *ar, Scene *scene, Object
 					float (*mval)[2] = MEM_mallocN(sizeof(*mval) * (nu->pntsu + is_cyclic), __func__);
 
 					for (bp = nu->bp, a = 0; a < nu->pntsu; a++, bp++) {
-						ED_view3d_project_float_v3_m4(ar, bp->vec, mval[a], projmat);
+						ED_view3d_project_float_v2_m4(ar, bp->vec, mval[a], projmat);
 					}
 					if (is_cyclic) {
 						copy_v2_v2(mval[a], mval[0]);