1 files changed, 110 insertions, 0 deletions
diff --git a/source/blender/nodes/geometry/nodes/node_geo_subdivide.cc b/source/blender/nodes/geometry/nodes/node_geo_subdivide.cc
new file mode 100644
index 00000000000..b5731851229
--- /dev/null
+++ b/source/blender/nodes/geometry/nodes/node_geo_subdivide.cc
@@ -0,0 +1,110 @@
+/*
+ * 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.
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "BKE_mesh.h"
+#include "BKE_subdiv.h"
+#include "BKE_subdiv_mesh.h"
+
+#include "UI_interface.h"
+#include "UI_resources.h"
+
+#include "node_geometry_util.hh"
+
+static bNodeSocketTemplate geo_node_subdivide_in[] = {
+    {SOCK_GEOMETRY, N_("Geometry")},
+    {SOCK_INT, N_("Level"), 1, 0, 0, 0, 0, 6},
+    {-1, ""},
+};
+
+static bNodeSocketTemplate geo_node_subdivide_out[] = {
+    {SOCK_GEOMETRY, N_("Geometry")},
+    {-1, ""},
+};
+
+namespace blender::nodes {
+
+static void geo_node_subdivide_exec(GeoNodeExecParams params)
+{
+  GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
+
+  if (!geometry_set.has_mesh()) {
+    params.set_output("Geometry", geometry_set);
+    return;
+  }
+
+#ifndef WITH_OPENSUBDIV
+  params.error_message_add(NodeWarningType::Error,
+                           TIP_("Disabled, Blender was built without OpenSubdiv"));
+  params.set_output("Geometry", std::move(geometry_set));
+  return;
+#endif
+
+  /* See CCGSUBSURF_LEVEL_MAX for max limit. */
+  const int subdiv_level = clamp_i(params.extract_input<int>("Level"), 0, 11);
+
+  if (subdiv_level == 0) {
+    params.set_output("Geometry", std::move(geometry_set));
+    return;
+  }
+
+  const Mesh *mesh_in = geometry_set.get_mesh_for_read();
+
+  /* Initialize mesh settings. */
+  SubdivToMeshSettings mesh_settings;
+  mesh_settings.resolution = (1 << subdiv_level) + 1;
+  mesh_settings.use_optimal_display = false;
+
+  /* Initialize subdivision settings. */
+  SubdivSettings subdiv_settings;
+  subdiv_settings.is_simple = true;
+  subdiv_settings.is_adaptive = false;
+  subdiv_settings.use_creases = false;
+  subdiv_settings.level = 1;
+  subdiv_settings.vtx_boundary_interpolation = BKE_subdiv_vtx_boundary_interpolation_from_subsurf(
+      0);
+  subdiv_settings.fvar_linear_interpolation = BKE_subdiv_fvar_interpolation_from_uv_smooth(0);
+
+  /* Apply subdivision from mesh. */
+  Subdiv *subdiv = BKE_subdiv_update_from_mesh(nullptr, &subdiv_settings, mesh_in);
+
+  /* In case of bad topology, skip to input mesh. */
+  if (subdiv == nullptr) {
+    params.set_output("Geometry", std::move(geometry_set));
+    return;
+  }
+
+  Mesh *mesh_out = BKE_subdiv_to_mesh(subdiv, &mesh_settings, mesh_in);
+  BKE_mesh_calc_normals(mesh_out);
+
+  geometry_set.replace_mesh(mesh_out);
+
+  BKE_subdiv_free(subdiv);
+
+  params.set_output("Geometry", std::move(geometry_set));
+}
+}  // namespace blender::nodes
+
+void register_node_type_geo_subdivide()
+{
+  static bNodeType ntype;
+
+  geo_node_type_base(&ntype, GEO_NODE_SUBDIVIDE, "Subdivide", NODE_CLASS_GEOMETRY, 0);
+  node_type_socket_templates(&ntype, geo_node_subdivide_in, geo_node_subdivide_out);
+  ntype.geometry_node_execute = blender::nodes::geo_node_subdivide_exec;
+  nodeRegisterType(&ntype);
+}