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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.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"
namespace blender::nodes::node_geo_subdivision_surface_cc {
NODE_STORAGE_FUNCS(NodeGeometrySubdivisionSurface)
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>(N_("Mesh")).supported_type(GEO_COMPONENT_TYPE_MESH);
b.add_input<decl::Int>(N_("Level")).default_value(1).min(0).max(6);
b.add_input<decl::Float>(N_("Crease"))
.default_value(0.0f)
.min(0.0f)
.max(1.0f)
.supports_field()
.subtype(PROP_FACTOR);
b.add_output<decl::Geometry>(N_("Mesh"));
}
static void node_layout(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
{
uiItemR(layout, ptr, "uv_smooth", 0, "", ICON_NONE);
uiItemR(layout, ptr, "boundary_smooth", 0, "", ICON_NONE);
}
static void node_init(bNodeTree *UNUSED(ntree), bNode *node)
{
NodeGeometrySubdivisionSurface *data = MEM_cnew<NodeGeometrySubdivisionSurface>(__func__);
data->uv_smooth = SUBSURF_UV_SMOOTH_PRESERVE_BOUNDARIES;
data->boundary_smooth = SUBSURF_BOUNDARY_SMOOTH_ALL;
node->storage = data;
}
static void node_geo_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Mesh");
#ifndef WITH_OPENSUBDIV
params.error_message_add(NodeWarningType::Error,
TIP_("Disabled, Blender was compiled without OpenSubdiv"));
#else
Field<float> crease_field = params.extract_input<Field<float>>("Crease");
const NodeGeometrySubdivisionSurface &storage = node_storage(params.node());
const int uv_smooth = storage.uv_smooth;
const int boundary_smooth = storage.boundary_smooth;
const int subdiv_level = clamp_i(params.extract_input<int>("Level"), 0, 30);
/* Only process subdivision if level is greater than 0. */
if (subdiv_level == 0) {
params.set_output("Mesh", std::move(geometry_set));
return;
}
geometry_set.modify_geometry_sets([&](GeometrySet &geometry_set) {
if (!geometry_set.has_mesh()) {
return;
}
MeshComponent &mesh_component = geometry_set.get_component_for_write<MeshComponent>();
AttributeDomain domain = ATTR_DOMAIN_EDGE;
GeometryComponentFieldContext field_context{mesh_component, domain};
const int domain_size = mesh_component.attribute_domain_size(domain);
if (domain_size == 0) {
return;
}
FieldEvaluator evaluator(field_context, domain_size);
evaluator.add(crease_field);
evaluator.evaluate();
const VArray<float> &creases = evaluator.get_evaluated<float>(0);
OutputAttribute_Typed<float> crease = mesh_component.attribute_try_get_for_output_only<float>(
"crease", domain);
MutableSpan<float> crease_span = crease.as_span();
for (auto i : creases.index_range()) {
crease_span[i] = std::clamp(creases[i], 0.0f, 1.0f);
}
crease.save();
/* 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 = !(creases.is_single() && creases.get_internal_single() == 0.0f);
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(
uv_smooth);
Mesh *mesh_in = mesh_component.get_for_write();
/* 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) {
return;
}
Mesh *mesh_out = BKE_subdiv_to_mesh(subdiv, &mesh_settings, mesh_in);
mesh_component.replace(mesh_out);
BKE_subdiv_free(subdiv);
});
#endif
params.set_output("Mesh", std::move(geometry_set));
}
} // namespace blender::nodes::node_geo_subdivision_surface_cc
void register_node_type_geo_subdivision_surface()
{
namespace file_ns = blender::nodes::node_geo_subdivision_surface_cc;
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_SUBDIVISION_SURFACE, "Subdivision Surface", NODE_CLASS_GEOMETRY);
ntype.declare = file_ns::node_declare;
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.draw_buttons = file_ns::node_layout;
node_type_init(&ntype, file_ns::node_init);
node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
node_type_storage(&ntype,
"NodeGeometrySubdivisionSurface",
node_free_standard_storage,
node_copy_standard_storage);
nodeRegisterType(&ntype);
}
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