1 files changed, 43 insertions, 4 deletions

diff --git a/source/blender/editors/object/object_shapekey.c b/source/blender/editors/object/object_shapekey.c
index 7c59278dcf5..fd2e7fd7c99 100644
--- a/source/blender/editors/object/object_shapekey.c
+++ b/source/blender/editors/object/object_shapekey.c
@@ -203,9 +203,9 @@ static int object_shape_key_mirror(bContext *C, Object *ob)
 						fp1= ((float *)kb->data) + i1*3;
 						fp2= ((float *)kb->data) + i2*3;
 
-						VECCOPY(tvec,	fp1);
-						VECCOPY(fp1,	fp2);
-						VECCOPY(fp2,	tvec);
+						copy_v3_v3(tvec,	fp1);
+						copy_v3_v3(fp1,	fp2);
+						copy_v3_v3(fp2,	tvec);
 
 						/* flip x axis */
 						fp1[0] = -fp1[0];
@@ -217,7 +217,46 @@ static int object_shape_key_mirror(bContext *C, Object *ob)
 
 			mesh_octree_table(ob, NULL, NULL, 'e');
 		}
-		/* todo, other types? */
+		else if (ob->type == OB_LATTICE) {
+			Lattice *lt= ob->data;
+			int i1, i2;
+			float *fp1, *fp2;
+			int u, v, w;
+			/* half but found up odd value */
+			const int pntsu_half = (((lt->pntsu / 2) + (lt->pntsu % 2))) ;
+
+			/* currently editmode isnt supported by mesh so
+			 * ignore here for now too */
+
+			/* if(lt->editlatt) lt= lt->editlatt->latt; */
+
+			for(w=0; w<lt->pntsw; w++) {
+				for(v=0; v<lt->pntsv; v++) {
+					for(u=0; u<pntsu_half; u++) {
+						int u_inv= (lt->pntsu - 1) - u;
+						float tvec[3];
+						if(u == u_inv) {
+							i1= LT_INDEX(lt, u, v, w);
+							fp1= ((float *)kb->data) + i1*3;
+							fp1[0]= -fp1[0];
+						}
+						else {
+							i1= LT_INDEX(lt, u, v, w);
+							i2= LT_INDEX(lt, u_inv, v, w);
+
+							fp1= ((float *)kb->data) + i1*3;
+							fp2= ((float *)kb->data) + i2*3;
+
+							copy_v3_v3(tvec, fp1);
+							copy_v3_v3(fp1, fp2);
+							copy_v3_v3(fp2, tvec);
+							fp1[0]= -fp1[0];
+							fp2[0]= -fp2[0];
+						}
+					}
+				}
+			}
+		}
 
 		MEM_freeN(tag_elem);
 	}