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
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "node_geometry_util.hh"
namespace blender::nodes::node_geo_set_id_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::Geometry>(N_("Geometry"));
b.add_input<decl::Bool>(N_("Selection")).default_value(true).hide_value().supports_field();
b.add_input<decl::Int>(N_("ID")).implicit_field(implicit_field_inputs::index);
b.add_output<decl::Geometry>(N_("Geometry"));
}
static void set_id_in_component(GeometryComponent &component,
const Field<bool> &selection_field,
const Field<int> &id_field)
{
const eAttrDomain domain = (component.type() == GEO_COMPONENT_TYPE_INSTANCES) ?
ATTR_DOMAIN_INSTANCE :
ATTR_DOMAIN_POINT;
const int domain_size = component.attribute_domain_size(domain);
if (domain_size == 0) {
return;
}
MutableAttributeAccessor attributes = *component.attributes_for_write();
bke::GeometryFieldContext field_context{component, domain};
fn::FieldEvaluator evaluator{field_context, domain_size};
evaluator.set_selection(selection_field);
/* Since adding the ID attribute can change the result of the field evaluation (the random value
* node uses the index if the ID is unavailable), make sure that it isn't added before evaluating
* the field. However, as an optimization, use a faster code path when it already exists. */
if (attributes.contains("id")) {
AttributeWriter<int> id_attribute = attributes.lookup_or_add_for_write<int>("id", domain);
evaluator.add_with_destination(id_field, id_attribute.varray);
evaluator.evaluate();
id_attribute.finish();
}
else {
evaluator.add(id_field);
evaluator.evaluate();
const IndexMask selection = evaluator.get_evaluated_selection_as_mask();
const VArray<int> result_ids = evaluator.get_evaluated<int>(0);
SpanAttributeWriter<int> id_attribute = attributes.lookup_or_add_for_write_span<int>("id",
domain);
result_ids.materialize(selection, id_attribute.span);
id_attribute.finish();
}
}
static void node_geo_exec(GeoNodeExecParams params)
{
GeometrySet geometry_set = params.extract_input<GeometrySet>("Geometry");
Field<bool> selection_field = params.extract_input<Field<bool>>("Selection");
Field<int> id_field = params.extract_input<Field<int>>("ID");
for (const GeometryComponentType type : {GEO_COMPONENT_TYPE_INSTANCES,
GEO_COMPONENT_TYPE_MESH,
GEO_COMPONENT_TYPE_POINT_CLOUD,
GEO_COMPONENT_TYPE_CURVE}) {
if (geometry_set.has(type)) {
set_id_in_component(geometry_set.get_component_for_write(type), selection_field, id_field);
}
}
params.set_output("Geometry", std::move(geometry_set));
}
} // namespace blender::nodes::node_geo_set_id_cc
void register_node_type_geo_set_id()
{
namespace file_ns = blender::nodes::node_geo_set_id_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_SET_ID, "Set ID", NODE_CLASS_GEOMETRY);
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.declare = file_ns::node_declare;
nodeRegisterType(&ntype);
}
|
