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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BLI_task.hh"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "BKE_attribute.hh"
#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_("Edge Crease"))
.default_value(0.0f)
.min(0.0f)
.max(1.0f)
.supports_field()
.subtype(PROP_FACTOR);
b.add_input<decl::Float>(N_("Vertex 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 * /*C*/, PointerRNA *ptr)
{
uiItemR(layout, ptr, "uv_smooth", 0, "", ICON_NONE);
uiItemR(layout, ptr, "boundary_smooth", 0, "", ICON_NONE);
}
static void node_init(bNodeTree * /*tree*/, 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;
}
#ifdef WITH_OPENSUBDIV
static void materialize_and_clamp_creases(const VArray<float> &crease_varray,
MutableSpan<float> creases)
{
threading::parallel_for(creases.index_range(), 1024, [&](IndexRange range) {
crease_varray.materialize(range, creases);
for (const int i : range) {
creases[i] = std::clamp(creases[i], 0.0f, 1.0f);
}
});
}
static void write_vertex_creases(Mesh &mesh, const VArray<float> &crease_varray)
{
float *crease;
if (CustomData_has_layer(&mesh.vdata, CD_CREASE)) {
crease = static_cast<float *>(CustomData_get_layer(&mesh.vdata, CD_CREASE));
}
else {
crease = static_cast<float *>(
CustomData_add_layer(&mesh.vdata, CD_CREASE, CD_CONSTRUCT, nullptr, mesh.totvert));
}
materialize_and_clamp_creases(crease_varray, {crease, mesh.totvert});
}
static void write_edge_creases(MeshComponent &mesh, const VArray<float> &crease_varray)
{
bke::SpanAttributeWriter<float> attribute =
mesh.attributes_for_write()->lookup_or_add_for_write_only_span<float>("crease",
ATTR_DOMAIN_EDGE);
materialize_and_clamp_creases(crease_varray, attribute.span);
attribute.finish();
}
static bool varray_is_nonzero(const VArray<float> &varray)
{
return !(varray.is_single() && varray.get_internal_single() == 0.0f);
}
#endif
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> edge_crease_field = params.extract_input<Field<float>>("Edge Crease");
Field<float> vertex_crease_field = params.extract_input<Field<float>>("Vertex 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;
}
const Mesh &mesh = *geometry_set.get_mesh_for_read();
if (mesh.totvert == 0 || mesh.totedge == 0) {
return;
}
bke::MeshFieldContext point_context{mesh, ATTR_DOMAIN_POINT};
FieldEvaluator point_evaluator(point_context, mesh.totvert);
point_evaluator.add(vertex_crease_field);
point_evaluator.evaluate();
const VArray<float> vertex_creases = point_evaluator.get_evaluated<float>(0);
bke::MeshFieldContext edge_context{mesh, ATTR_DOMAIN_EDGE};
FieldEvaluator edge_evaluator(edge_context, mesh.totedge);
edge_evaluator.add(edge_crease_field);
edge_evaluator.evaluate();
const VArray<float> edge_creases = edge_evaluator.get_evaluated<float>(0);
const bool use_creases = varray_is_nonzero(vertex_creases) || varray_is_nonzero(edge_creases);
if (use_creases) {
write_vertex_creases(*geometry_set.get_mesh_for_write(), vertex_creases);
write_edge_creases(geometry_set.get_component_for_write<MeshComponent>(), edge_creases);
}
/* 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_creases;
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);
/* Apply subdivision to mesh. */
Subdiv *subdiv = BKE_subdiv_update_from_mesh(nullptr, &subdiv_settings, &mesh);
/* In case of bad topology, skip to input mesh. */
if (subdiv == nullptr) {
return;
}
Mesh *mesh_out = BKE_subdiv_to_mesh(subdiv, &mesh_settings, &mesh);
geometry_set.replace_mesh(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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