1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "DNA_mesh_types.h"
#include "BKE_mesh.h"
#include "BKE_mesh_runtime.h"
#include "bmesh.h"
#include "bmesh_tools.h"
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_edge_split_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).hide_value().supports_field();
b.add_output<decl::Geometry>(N_("Mesh"));
}
static Mesh *mesh_edge_split(const Mesh &mesh, const IndexMask selection)
{
BMeshCreateParams bmesh_create_params{};
bmesh_create_params.use_toolflags = true;
const BMAllocTemplate allocsize = {0, 0, 0, 0};
BMesh *bm = BM_mesh_create(&allocsize, &bmesh_create_params);
BMeshFromMeshParams bmesh_from_mesh_params{};
bmesh_from_mesh_params.cd_mask_extra.vmask = CD_MASK_ORIGINDEX;
bmesh_from_mesh_params.cd_mask_extra.emask = CD_MASK_ORIGINDEX;
bmesh_from_mesh_params.cd_mask_extra.pmask = CD_MASK_ORIGINDEX;
BM_mesh_bm_from_me(bm, &mesh, &bmesh_from_mesh_params);
BM_mesh_elem_table_ensure(bm, BM_EDGE);
for (const int i : selection) {
BMEdge *edge = BM_edge_at_index(bm, i);
BM_elem_flag_enable(edge, BM_ELEM_TAG);
}
BM_mesh_edgesplit(bm, false, true, false);
Mesh *result = BKE_mesh_from_bmesh_for_eval_nomain(bm, nullptr, &mesh);
BM_mesh_free(bm);
return result;
}
static void node_geo_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Mesh");
const Field<bool> selection_field = params.extract_input<Field<bool>>("Selection");
geometry_set.modify_geometry_sets([&](GeometrySet &geometry_set) {
if (const Mesh *mesh = geometry_set.get_mesh_for_write()) {
bke::MeshFieldContext field_context{*mesh, ATTR_DOMAIN_EDGE};
fn::FieldEvaluator selection_evaluator{field_context, mesh->totedge};
selection_evaluator.add(selection_field);
selection_evaluator.evaluate();
const IndexMask selection = selection_evaluator.get_evaluated_as_mask(0);
Mesh *result = mesh_edge_split(*mesh, selection);
geometry_set.replace_mesh(result);
}
});
params.set_output("Mesh", std::move(geometry_set));
}
} // namespace blender::nodes::node_geo_edge_split_cc
void register_node_type_geo_edge_split()
{
namespace file_ns = blender::nodes::node_geo_edge_split_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_SPLIT_EDGES, "Split Edges", NODE_CLASS_GEOMETRY);
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.declare = file_ns::node_declare;
nodeRegisterType(&ntype);
}
|