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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "GEO_uv_parametrizer.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "BKE_mesh.h"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_uv_pack_islands_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Vector>(N_("UV")).hide_value().supports_field();
b.add_input<decl::Bool>(N_("Selection"))
.default_value(true)
.hide_value()
.supports_field()
.description(N_("Faces to consider when packing islands"));
b.add_input<decl::Float>(N_("Margin"))
.default_value(0.001f)
.min(0.0f)
.max(1.0f)
.description(N_("Space between islands"));
b.add_input<decl::Bool>(N_("Rotate"))
.default_value(true)
.description(N_("Rotate islands for best fit"));
b.add_output<decl::Vector>(N_("UV")).field_source();
}
static VArray<float3> construct_uv_gvarray(const Mesh &mesh,
const Field<bool> selection_field,
const Field<float3> uv_field,
const bool rotate,
const float margin,
const eAttrDomain domain)
{
const Span<float3> positions = mesh.positions();
const Span<MPoly> polys = mesh.polys();
const Span<MLoop> loops = mesh.loops();
bke::MeshFieldContext face_context{mesh, ATTR_DOMAIN_FACE};
FieldEvaluator face_evaluator{face_context, polys.size()};
face_evaluator.add(selection_field);
face_evaluator.evaluate();
const IndexMask selection = face_evaluator.get_evaluated_as_mask(0);
if (selection.is_empty()) {
return {};
}
bke::MeshFieldContext corner_context{mesh, ATTR_DOMAIN_CORNER};
FieldEvaluator evaluator{corner_context, mesh.totloop};
Array<float3> uv(mesh.totloop);
evaluator.add_with_destination(uv_field, uv.as_mutable_span());
evaluator.evaluate();
ParamHandle *handle = GEO_uv_parametrizer_construct_begin();
for (const int mp_index : selection) {
const MPoly &mp = polys[mp_index];
Array<ParamKey, 16> mp_vkeys(mp.totloop);
Array<bool, 16> mp_pin(mp.totloop);
Array<bool, 16> mp_select(mp.totloop);
Array<const float *, 16> mp_co(mp.totloop);
Array<float *, 16> mp_uv(mp.totloop);
for (const int i : IndexRange(mp.totloop)) {
const MLoop &ml = loops[mp.loopstart + i];
mp_vkeys[i] = ml.v;
mp_co[i] = positions[ml.v];
mp_uv[i] = uv[mp.loopstart + i];
mp_pin[i] = false;
mp_select[i] = false;
}
GEO_uv_parametrizer_face_add(handle,
mp_index,
mp.totloop,
mp_vkeys.data(),
mp_co.data(),
mp_uv.data(),
mp_pin.data(),
mp_select.data());
}
GEO_uv_parametrizer_construct_end(handle, true, true, nullptr);
GEO_uv_parametrizer_pack(handle, margin, rotate, true);
GEO_uv_parametrizer_flush(handle);
GEO_uv_parametrizer_delete(handle);
return mesh.attributes().adapt_domain<float3>(
VArray<float3>::ForContainer(std::move(uv)), ATTR_DOMAIN_CORNER, domain);
}
class PackIslandsFieldInput final : public bke::MeshFieldInput {
private:
const Field<bool> selection_field;
const Field<float3> uv_field;
const bool rotate;
const float margin;
public:
PackIslandsFieldInput(const Field<bool> selection_field,
const Field<float3> uv_field,
const bool rotate,
const float margin)
: bke::MeshFieldInput(CPPType::get<float3>(), "Pack UV Islands Field"),
selection_field(selection_field),
uv_field(uv_field),
rotate(rotate),
margin(margin)
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const Mesh &mesh,
const eAttrDomain domain,
const IndexMask /*mask*/) const final
{
return construct_uv_gvarray(mesh, selection_field, uv_field, rotate, margin, domain);
}
std::optional<eAttrDomain> preferred_domain(const Mesh & /*mesh*/) const override
{
return ATTR_DOMAIN_CORNER;
}
};
static void node_geo_exec(GeoNodeExecParams params)
{
const Field<bool> selection_field = params.extract_input<Field<bool>>("Selection");
const Field<float3> uv_field = params.extract_input<Field<float3>>("UV");
const bool rotate = params.extract_input<bool>("Rotate");
const float margin = params.extract_input<float>("Margin");
params.set_output("UV",
Field<float3>(std::make_shared<PackIslandsFieldInput>(
selection_field, uv_field, rotate, margin)));
}
} // namespace blender::nodes::node_geo_uv_pack_islands_cc
void register_node_type_geo_uv_pack_islands()
{
namespace file_ns = blender::nodes::node_geo_uv_pack_islands_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_UV_PACK_ISLANDS, "Pack UV Islands", NODE_CLASS_CONVERTER);
ntype.declare = file_ns::node_declare;
ntype.geometry_node_execute = file_ns::node_geo_exec;
nodeRegisterType(&ntype);
}
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