[Bf-blender-cvs] [85bdbd7] master: Sculpt: skip normal calculation entering dyntopo

[Campbell Barton]

Commit: 85bdbd76537a239f2f146f6390ffd9963d25d87c
Author: Campbell Barton
Date:   Fri Jul 1 21:13:12 2016 +1000
Branches: master
https://developer.blender.org/rB85bdbd76537a239f2f146f6390ffd9963d25d87c

Sculpt: skip normal calculation entering dyntopo

When no triangulation runs we can skip re-calculating normals.

===================================================================

M	source/blender/editors/sculpt_paint/sculpt.c

===================================================================

diff --git a/source/blender/editors/sculpt_paint/sculpt.c b/source/blender/editors/sculpt_paint/sculpt.c
index 67609d9..37ec2d0 100644
--- a/source/blender/editors/sculpt_paint/sculpt.c
+++ b/source/blender/editors/sculpt_paint/sculpt.c
@@ -5013,7 +5013,9 @@ void sculpt_dynamic_topology_enable(bContext *C)
 	BM_data_layer_add(ss->bm, &ss->bm->vdata, CD_PAINT_MASK);
 	sculpt_dyntopo_node_layers_add(ss);
 	/* make sure the data for existing faces are initialized */
-	BM_mesh_normals_update(ss->bm);
+	if (me->totpoly != ss->bm->totface) {
+		BM_mesh_normals_update(ss->bm);
+	}
 
 	/* Enable dynamic topology */
 	me->flag |= ME_SCULPT_DYNAMIC_TOPOLOGY;