Bugfix #16662

Curve modifier on lattice suffered drawing updates, only when the system
was not animated though, missed depsgraph calls then.

Solved it by forcing lattice to always return displist for its vertices,
that's same as for how mesh/curve works now.

2 files changed, 9 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/lattice.c b/source/blender/blenkernel/intern/lattice.c
index e8bcae42d5a..54915058bab 100644
--- a/source/blender/blenkernel/intern/lattice.c
+++ b/source/blender/blenkernel/intern/lattice.c
@@ -915,7 +915,10 @@ void lattice_calc_modifiers(Object *ob)
 		mti->deformVerts(md, ob, NULL, vertexCos, numVerts);
 	}
 
-	if (vertexCos) {
+	/* always displist to make this work like derivedmesh */
+	if (!vertexCos) vertexCos = lattice_getVertexCos(ob, &numVerts);
+	
+	{
 		DispList *dl = MEM_callocN(sizeof(*dl), "lt_dl");
 		dl->type = DL_VERTS;
 		dl->parts = 1;
diff --git a/source/blender/src/drawobject.c b/source/blender/src/drawobject.c
index 045bf292446..1a469e8b366 100644
--- a/source/blender/src/drawobject.c
+++ b/source/blender/src/drawobject.c
@@ -1199,7 +1199,12 @@ static void drawlattice(Object *ob)
 	int use_wcol= 0;
 
 	lt= (ob==G.obedit)?editLatt:ob->data;
+	
+	/* now we default make displist, this will modifiers work for non animated case */
+	if(ob->disp.first==NULL)
+		lattice_calc_modifiers(ob);
 	dl= find_displist(&ob->disp, DL_VERTS);
+	
 	if(ob==G.obedit) {
 		cpack(0x004000);