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
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "node_geometry_util.hh"
#include "UI_interface.h"
#include "UI_resources.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "BKE_material.h"
namespace blender::nodes {
static void geo_node_set_material_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>(N_("Geometry")).supported_type(GEO_COMPONENT_TYPE_MESH);
b.add_input<decl::Bool>(N_("Selection")).default_value(true).hide_value().supports_field();
b.add_input<decl::Material>(N_("Material")).hide_label();
b.add_output<decl::Geometry>(N_("Geometry"));
}
static void assign_material_to_faces(Mesh &mesh, const IndexMask selection, Material *material)
{
int new_material_index = -1;
for (const int i : IndexRange(mesh.totcol)) {
Material *other_material = mesh.mat[i];
if (other_material == material) {
new_material_index = i;
break;
}
}
if (new_material_index == -1) {
/* Append a new material index. */
new_material_index = mesh.totcol;
BKE_id_material_eval_assign(&mesh.id, new_material_index + 1, material);
}
mesh.mpoly = (MPoly *)CustomData_duplicate_referenced_layer(&mesh.pdata, CD_MPOLY, mesh.totpoly);
for (const int i : selection) {
MPoly &poly = mesh.mpoly[i];
poly.mat_nr = new_material_index;
}
}
static void geo_node_set_material_exec(GeoNodeExecParams params)
{
Material *material = params.extract_input<Material *>("Material");
const Field<bool> selection_field = params.extract_input<Field<bool>>("Selection");
GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
geometry_set.modify_geometry_sets([&](GeometrySet &geometry_set) {
if (geometry_set.has<MeshComponent>()) {
MeshComponent &mesh_component = geometry_set.get_component_for_write<MeshComponent>();
Mesh *mesh = mesh_component.get_for_write();
if (mesh != nullptr) {
GeometryComponentFieldContext field_context{mesh_component, ATTR_DOMAIN_FACE};
fn::FieldEvaluator selection_evaluator{field_context, mesh->totpoly};
selection_evaluator.add(selection_field);
selection_evaluator.evaluate();
const IndexMask selection = selection_evaluator.get_evaluated_as_mask(0);
assign_material_to_faces(*mesh, selection, material);
}
}
});
params.set_output("Geometry", std::move(geometry_set));
}
} // namespace blender::nodes
void register_node_type_geo_set_material()
{
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_SET_MATERIAL, "Set Material", NODE_CLASS_GEOMETRY, 0);
ntype.declare = blender::nodes::geo_node_set_material_declare;
ntype.geometry_node_execute = blender::nodes::geo_node_set_material_exec;
nodeRegisterType(&ntype);
}
|