dyntopo: don't allocate tessfaces while sculpting

Tessellation data isn't used for drawing or sculpting.

This frees up some memory ~approx 10% in own tests.
Also slight spee-up since it avoids calculating it in the first place.

1 files changed, 9 insertions, 8 deletions

diff --git a/source/blender/blenkernel/intern/paint.c b/source/blender/blenkernel/intern/paint.c
index b45e6b81ec8..fd5d14b6cfc 100644
--- a/source/blender/blenkernel/intern/paint.c
+++ b/source/blender/blenkernel/intern/paint.c
@@ -566,13 +566,9 @@ void paint_calculate_rake_rotation(UnifiedPaintSettings *ups, Brush *brush, cons
 
 void BKE_sculptsession_free_deformMats(SculptSession *ss)
 {
-	if (ss->orig_cos) MEM_freeN(ss->orig_cos);
-	if (ss->deform_cos) MEM_freeN(ss->deform_cos);
-	if (ss->deform_imats) MEM_freeN(ss->deform_imats);
-
-	ss->orig_cos = NULL;
-	ss->deform_cos = NULL;
-	ss->deform_imats = NULL;
+	MEM_SAFE_FREE(ss->orig_cos);
+	MEM_SAFE_FREE(ss->deform_cos);
+	MEM_SAFE_FREE(ss->deform_imats);
 }
 
 /* Write out the sculpt dynamic-topology BMesh to the Mesh */
@@ -772,7 +768,12 @@ void BKE_sculpt_update_mesh_elements(Scene *scene, Sculpt *sd, Object *ob,
 	}
 
 	/* BMESH ONLY --- at some point we should move sculpt code to use polygons only - but for now it needs tessfaces */
-	BKE_mesh_tessface_ensure(me);
+	if (ss->bm) {
+		BKE_mesh_tessface_clear(me);
+	}
+	else {
+		BKE_mesh_tessface_ensure(me);
+	}
 
 	if (!mmd) ss->kb = BKE_keyblock_from_object(ob);
 	else ss->kb = NULL;