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/*
* 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_subdivision_surface_in[] = {
{SOCK_GEOMETRY, N_("Geometry")},
{SOCK_INT, N_("Level"), 1, 0, 0, 0, 0, 6},
{SOCK_BOOLEAN, N_("Use Creases")},
{SOCK_BOOLEAN, N_("Boundary Smooth"), true},
{SOCK_BOOLEAN, N_("Smooth UVs")},
{-1, ""},
};
static bNodeSocketTemplate geo_node_subdivision_surface_out[] = {
{SOCK_GEOMETRY, N_("Geometry")},
{-1, ""},
};
static void geo_node_subdivision_surface_layout(uiLayout *layout,
bContext *UNUSED(C),
PointerRNA *UNUSED(ptr))
{
#ifndef WITH_OPENSUBDIV
uiItemL(layout, IFACE_("Disabled, built without OpenSubdiv"), ICON_ERROR);
#else
UNUSED_VARS(layout);
#endif
}
namespace blender::nodes {
static void geo_node_subdivision_surface_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
geometry_set = geometry_set_realize_instances(geometry_set);
if (!geometry_set.has_mesh()) {
params.set_output("Geometry", geometry_set);
return;
}
#ifndef WITH_OPENSUBDIV
/* Return input geometry if Blender is built without OpenSubdiv. */
params.set_output("Geometry", std::move(geometry_set));
return;
#else
const int subdiv_level = clamp_i(params.extract_input<int>("Level"), 0, 30);
/* Only process subdivion if level is greater than 0. */
if (subdiv_level == 0) {
params.set_output("Geometry", std::move(geometry_set));
return;
}
const bool use_crease = params.extract_input<bool>("Use Creases");
const bool boundary_smooth = params.extract_input<bool>("Boundary Smooth");
const bool smooth_uvs = params.extract_input<bool>("Smooth UVs");
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 = false;
subdiv_settings.is_adaptive = false;
subdiv_settings.use_creases = use_crease;
subdiv_settings.level = subdiv_level;
subdiv_settings.vtx_boundary_interpolation = BKE_subdiv_vtx_boundary_interpolation_from_subsurf(
!boundary_smooth);
subdiv_settings.fvar_linear_interpolation = BKE_subdiv_fvar_interpolation_from_uv_smooth(
smooth_uvs);
/* Apply subdivision to 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);
MeshComponent &mesh_component = geometry_set.get_component_for_write<MeshComponent>();
mesh_component.replace_mesh_but_keep_vertex_group_names(mesh_out);
// BKE_subdiv_stats_print(&subdiv->stats);
BKE_subdiv_free(subdiv);
params.set_output("Geometry", std::move(geometry_set));
#endif
}
} // namespace blender::nodes
void register_node_type_geo_subdivision_surface()
{
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_SUBDIVISION_SURFACE, "Subdivision Surface", NODE_CLASS_GEOMETRY, 0);
node_type_socket_templates(
&ntype, geo_node_subdivision_surface_in, geo_node_subdivision_surface_out);
ntype.geometry_node_execute = blender::nodes::geo_node_subdivision_surface_exec;
ntype.draw_buttons = geo_node_subdivision_surface_layout;
nodeRegisterType(&ntype);
}
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