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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "node_geometry_util.hh"
#include "BKE_curves.hh"
#include "BKE_spline.hh"
namespace blender::nodes::node_geo_input_spline_length_cc {
static void node_declare(NodeDeclarationBuilder &b)
{
b.add_output<decl::Float>(N_("Length")).field_source();
b.add_output<decl::Int>(N_("Point Count")).field_source();
}
/* --------------------------------------------------------------------
* Spline Length
*/
static VArray<float> construct_spline_length_gvarray(const CurveComponent &component,
const AttributeDomain domain)
{
if (!component.has_curves()) {
return {};
}
const std::unique_ptr<CurveEval> curve = curves_to_curve_eval(*component.get_for_read());
Span<SplinePtr> splines = curve->splines();
Array<float> spline_lenghts(splines.size());
for (const int i : splines.index_range()) {
spline_lenghts[i] = splines[i]->length();
}
if (domain == ATTR_DOMAIN_CURVE) {
return VArray<float>::ForContainer(std::move(spline_lenghts));
}
if (domain == ATTR_DOMAIN_POINT) {
VArray<float> length = VArray<float>::ForContainer(std::move(spline_lenghts));
return component.attribute_try_adapt_domain<float>(
std::move(length), ATTR_DOMAIN_CURVE, ATTR_DOMAIN_POINT);
}
return {};
}
class SplineLengthFieldInput final : public GeometryFieldInput {
public:
SplineLengthFieldInput() : GeometryFieldInput(CPPType::get<float>(), "Spline Length node")
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const GeometryComponent &component,
const AttributeDomain domain,
IndexMask UNUSED(mask)) const final
{
if (component.type() == GEO_COMPONENT_TYPE_CURVE) {
const CurveComponent &curve_component = static_cast<const CurveComponent &>(component);
return construct_spline_length_gvarray(curve_component, domain);
}
return {};
}
uint64_t hash() const override
{
/* Some random constant hash. */
return 3549623580;
}
bool is_equal_to(const fn::FieldNode &other) const override
{
return dynamic_cast<const SplineLengthFieldInput *>(&other) != nullptr;
}
};
/* --------------------------------------------------------------------
* Spline Count
*/
static VArray<int> construct_spline_count_gvarray(const CurveComponent &component,
const AttributeDomain domain)
{
if (!component.has_curves()) {
return {};
}
const Curves &curves_id = *component.get_for_read();
const bke::CurvesGeometry &curves = bke::CurvesGeometry::wrap(curves_id.geometry);
auto count_fn = [curves](int64_t i) { return curves.points_for_curve(i).size(); };
if (domain == ATTR_DOMAIN_CURVE) {
return VArray<int>::ForFunc(curves.num_curves(), count_fn);
}
if (domain == ATTR_DOMAIN_POINT) {
VArray<int> count = VArray<int>::ForFunc(curves.num_curves(), count_fn);
return component.attribute_try_adapt_domain<int>(
std::move(count), ATTR_DOMAIN_CURVE, ATTR_DOMAIN_POINT);
}
return {};
}
class SplineCountFieldInput final : public GeometryFieldInput {
public:
SplineCountFieldInput() : GeometryFieldInput(CPPType::get<int>(), "Spline Point Count")
{
category_ = Category::Generated;
}
GVArray get_varray_for_context(const GeometryComponent &component,
const AttributeDomain domain,
IndexMask UNUSED(mask)) const final
{
if (component.type() == GEO_COMPONENT_TYPE_CURVE) {
const CurveComponent &curve_component = static_cast<const CurveComponent &>(component);
return construct_spline_count_gvarray(curve_component, domain);
}
return {};
}
uint64_t hash() const override
{
/* Some random constant hash. */
return 456364322625;
}
bool is_equal_to(const fn::FieldNode &other) const override
{
return dynamic_cast<const SplineCountFieldInput *>(&other) != nullptr;
}
};
static void node_geo_exec(GeoNodeExecParams params)
{
Field<float> spline_length_field{std::make_shared<SplineLengthFieldInput>()};
Field<int> spline_count_field{std::make_shared<SplineCountFieldInput>()};
params.set_output("Length", std::move(spline_length_field));
params.set_output("Point Count", std::move(spline_count_field));
}
} // namespace blender::nodes::node_geo_input_spline_length_cc
void register_node_type_geo_input_spline_length()
{
namespace file_ns = blender::nodes::node_geo_input_spline_length_cc;
static bNodeType ntype;
geo_node_type_base(&ntype, GEO_NODE_INPUT_SPLINE_LENGTH, "Spline Length", NODE_CLASS_INPUT);
ntype.geometry_node_execute = file_ns::node_geo_exec;
ntype.declare = file_ns::node_declare;
nodeRegisterType(&ntype);
}
|