3 files changed, 115 insertions, 0 deletions
diff --git a/intern/opensubdiv/CMakeLists.txt b/intern/opensubdiv/CMakeLists.txt
index 4387daf40e4..70c5453d3bd 100644
--- a/intern/opensubdiv/CMakeLists.txt
+++ b/intern/opensubdiv/CMakeLists.txt
@@ -78,6 +78,8 @@ if(WITH_OPENSUBDIV)
     internal/evaluator/evaluator_impl.h
 
     # Topology.
+    internal/topology/mesh_topology.cc
+    internal/topology/mesh_topology.h
     internal/topology/topology_refiner_capi.cc
     internal/topology/topology_refiner_factory.cc
     internal/topology/topology_refiner_impl.cc
diff --git a/intern/opensubdiv/internal/topology/mesh_topology.cc b/intern/opensubdiv/internal/topology/mesh_topology.cc
new file mode 100644
index 00000000000..f8832d61cd0
--- /dev/null
+++ b/intern/opensubdiv/internal/topology/mesh_topology.cc
@@ -0,0 +1,52 @@
+// Copyright 2020 Blender Foundation. All rights reserved.
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software Foundation,
+// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+//
+// Author: Sergey Sharybin
+
+#include "internal/topology/mesh_topology.h"
+
+#include <cassert>
+
+namespace blender {
+namespace opensubdiv {
+
+MeshTopology::MeshTopology()
+{
+}
+
+MeshTopology::~MeshTopology()
+{
+}
+
+void MeshTopology::setNumVertices(int num_vertices)
+{
+  vertices.resize(num_vertices);
+}
+int MeshTopology::getNumVertices() const
+{
+  return vertices.size();
+}
+
+void MeshTopology::setVertexSharpness(int vertex_index, float sharpness)
+{
+  assert(vertex_index >= 0);
+  assert(vertex_index < vertices.size());
+
+  vertices[vertex_index].sharpness = sharpness;
+}
+
+}  // namespace opensubdiv
+}  // namespace blender
diff --git a/intern/opensubdiv/internal/topology/mesh_topology.h b/intern/opensubdiv/internal/topology/mesh_topology.h
new file mode 100644
index 00000000000..9893c70dac8
--- /dev/null
+++ b/intern/opensubdiv/internal/topology/mesh_topology.h
@@ -0,0 +1,61 @@
+// Copyright 2020 Blender Foundation. All rights reserved.
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software Foundation,
+// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+//
+// Author: Sergey Sharybin
+
+#ifndef OPENSUBDIV_MESH_TOPOLOGY_H_
+#define OPENSUBDIV_MESH_TOPOLOGY_H_
+
+#include "internal/base/memory.h"
+#include "internal/base/type.h"
+
+struct OpenSubdiv_Converter;
+
+namespace blender {
+namespace opensubdiv {
+
+class VertexTopology {
+ public:
+  float sharpness = 0.0f;
+};
+
+// Simplified representation of mesh topology.
+// Only includes parts of actual mesh topology which is needed to perform
+// comparison between Application side and OpenSubddiv side.
+class MeshTopology {
+ public:
+  MeshTopology();
+  MeshTopology(const MeshTopology &other) = default;
+  MeshTopology(MeshTopology &&other) noexcept = default;
+  ~MeshTopology();
+
+  MeshTopology &operator=(const MeshTopology &other) = default;
+  MeshTopology &operator=(MeshTopology &&other) = default;
+
+  void setNumVertices(int num_vertices);
+  int getNumVertices() const;
+
+  void setVertexSharpness(int vertex_index, float sharpness);
+
+  vector<VertexTopology> vertices;
+
+  MEM_CXX_CLASS_ALLOC_FUNCS("MeshTopology");
+};
+
+}  // namespace opensubdiv
+}  // namespace blender
+
+#endif  // OPENSUBDIV_MESH_TOPOLOGY_H_