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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BKE_customdata.h"
#include "BKE_mesh.h"
#include "bmesh.h"
#include "bmesh_tools.h"
#include "DNA_mesh_types.h"
#include "UI_interface.h"
#include "UI_resources.h"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_triangulate_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>(N_("Mesh")).supported_type(GEO_COMPONENT_TYPE_MESH);
b.add_input<decl::Bool>(N_("Selection")).default_value(true).supports_field().hide_value();
b.add_input<decl::Int>(N_("Minimum Vertices")).default_value(4).min(4).max(10000);
b.add_output<decl::Geometry>(N_("Mesh"));
}
static void node_layout(uiLayout *layout, bContext * /*C*/, PointerRNA *ptr)
{
uiItemR(layout, ptr, "quad_method", 0, "", ICON_NONE);
uiItemR(layout, ptr, "ngon_method", 0, "", ICON_NONE);
}
static void geo_triangulate_init(bNodeTree * /*tree*/, bNode *node)
{
node->custom1 = GEO_NODE_TRIANGULATE_QUAD_SHORTEDGE;
node->custom2 = GEO_NODE_TRIANGULATE_NGON_BEAUTY;
}
static Mesh *triangulate_mesh_selection(const Mesh &mesh,
const int quad_method,
const int ngon_method,
const IndexMask selection,
const int min_vertices)
{
CustomData_MeshMasks cd_mask_extra = {
CD_MASK_ORIGINDEX, CD_MASK_ORIGINDEX, 0, CD_MASK_ORIGINDEX};
BMeshCreateParams create_params{0};
BMeshFromMeshParams from_mesh_params{};
from_mesh_params.calc_face_normal = true;
from_mesh_params.calc_vert_normal = true;
from_mesh_params.cd_mask_extra = cd_mask_extra;
BMesh *bm = BKE_mesh_to_bmesh_ex(&mesh, &create_params, &from_mesh_params);
/* Tag faces to be triangulated from the selection mask. */
BM_mesh_elem_table_ensure(bm, BM_FACE);
for (int i_face : selection) {
BM_elem_flag_set(BM_face_at_index(bm, i_face), BM_ELEM_TAG, true);
}
BM_mesh_triangulate(bm, quad_method, ngon_method, min_vertices, true, nullptr, nullptr, nullptr);
Mesh *result = BKE_mesh_from_bmesh_for_eval_nomain(bm, &cd_mask_extra, &mesh);
BM_mesh_free(bm);
return result;
}
static void node_geo_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Mesh");
Field<bool> selection_field = params.extract_input<Field<bool>>("Selection");
const int min_vertices = std::max(params.extract_input<int>("Minimum Vertices"), 4);
GeometryNodeTriangulateQuads quad_method = GeometryNodeTriangulateQuads(params.node().custom1);
GeometryNodeTriangulateNGons ngon_method = GeometryNodeTriangulateNGons(params.node().custom2);
geometry_set.modify_geometry_sets([&](GeometrySet &geometry_set) {
if (!geometry_set.has_mesh()) {
return;
}
const Mesh &mesh_in = *geometry_set.get_mesh_for_read();
bke::MeshFieldContext context{mesh_in, ATTR_DOMAIN_FACE};
FieldEvaluator evaluator{context, mesh_in.totpoly};
evaluator.add(selection_field);
evaluator.evaluate();
const IndexMask selection = evaluator.get_evaluated_as_mask(0);
Mesh *mesh_out = triangulate_mesh_selection(
mesh_in, quad_method, ngon_method, selection, min_vertices);
geometry_set.replace_mesh(mesh_out);
});
params.set_output("Mesh", std::move(geometry_set));
}
} // namespace blender::nodes::node_geo_triangulate_cc
void register_node_type_geo_triangulate()
{
namespace file_ns = blender::nodes::node_geo_triangulate_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_TRIANGULATE, "Triangulate", NODE_CLASS_GEOMETRY);
ntype.declare = file_ns::node_declare;
ntype.initfunc = file_ns::geo_triangulate_init;
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.draw_buttons = file_ns::node_layout;
nodeRegisterType(&ntype);
}
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