Fix T41532: Some files bounce back and forth between 'packing BVH nodes' and 'Copying Transforms to Device'

This was originally caused by a6ae12a where i didn't foresee unclear distinguishing
between empty and non-synced meshes will give issues for the viewport. They're the
same for final rendering, but for viewport we need to be accurate here.

2 files changed, 4 insertions, 0 deletions

diff --git a/intern/cycles/render/mesh.cpp b/intern/cycles/render/mesh.cpp
index 273443034c5..8299cd02fef 100644
--- a/intern/cycles/render/mesh.cpp
+++ b/intern/cycles/render/mesh.cpp
@@ -132,6 +132,7 @@ void Mesh::clear()
 	transform_applied = false;
 	transform_negative_scaled = false;
 	transform_normal = transform_identity();
+	geometry_synced = false;
 }
 
 int Mesh::split_vertex(int vertex)
diff --git a/intern/cycles/render/mesh.h b/intern/cycles/render/mesh.h
index 5ee774bacc1..d45905611fa 100644
--- a/intern/cycles/render/mesh.h
+++ b/intern/cycles/render/mesh.h
@@ -71,6 +71,9 @@ public:
 	ustring name;
 
 	/* Mesh Data */
+	bool geometry_synced;  /* used to distinguish meshes with no verts
+	                          and meshed for which geometry is not created */
+
 	vector<float3> verts;
 	vector<Triangle> triangles;
 	vector<uint> shader;