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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
// K-3D
// Copyright (c) 1995-2004, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/** \file
\author Timothy M. Shead (tshead@k-3d.com)
*/
#include <k3dsdk/imaterial.h>
#include <k3dsdk/object.h>
#include <k3dsdk/persistence.h>
#include <k3dsdk/material.h>
#include <k3dsdk/material_collection.h>
#include <k3dsdk/measurement.h>
#include <k3dsdk/mesh_source.h>
#include <k3dsdk/module.h>
#include <k3dsdk/plugins.h>
#include <k3dsdk/transform.h>
#include <iterator>
namespace libk3dmesh
{
/////////////////////////////////////////////////////////////////////////////
// poly_sphere_implementation
class poly_sphere_implementation :
public k3d::material_collection<k3d::mesh_source<k3d::persistent<k3d::object> > >
{
typedef k3d::material_collection<k3d::mesh_source<k3d::persistent<k3d::object> > > base;
public:
poly_sphere_implementation(k3d::idocument& Document) :
base(Document),
m_u_segments(k3d::init_name("u_segments") + k3d::init_description("Columns [integer]") + k3d::init_value(32) + k3d::init_document(Document) + k3d::init_constraint(k3d::constraint::minimum(3UL)) + k3d::init_precision(0) + k3d::init_step_increment(1) + k3d::init_units(typeid(k3d::measurement::scalar))),
m_v_segments(k3d::init_name("v_segments") + k3d::init_description("Rows [integer]") + k3d::init_value(16) + k3d::init_document(Document) + k3d::init_constraint(k3d::constraint::minimum(1UL)) + k3d::init_precision(0) + k3d::init_step_increment(1) + k3d::init_units(typeid(k3d::measurement::scalar))),
m_radius(k3d::init_name("radius") + k3d::init_description("Radius [number]") + k3d::init_document(Document) + k3d::init_value(5.0) + k3d::init_precision(2) + k3d::init_step_increment(0.1) + k3d::init_units(typeid(k3d::measurement::distance))),
m_u_power(k3d::init_name("u_power") + k3d::init_description("Radial Power [number]") + k3d::init_document(Document) + k3d::init_value(1.0) + k3d::init_precision(2) + k3d::init_step_increment(0.1) + k3d::init_units(typeid(k3d::measurement::scalar))),
m_v_power(k3d::init_name("v_power") + k3d::init_description("Length Power [number]") + k3d::init_document(Document) + k3d::init_value(1.0) + k3d::init_precision(2) + k3d::init_step_increment(0.1) + k3d::init_units(typeid(k3d::measurement::scalar)))
{
enable_serialization(k3d::persistence::proxy(m_u_segments));
enable_serialization(k3d::persistence::proxy(m_v_segments));
enable_serialization(k3d::persistence::proxy(m_radius));
enable_serialization(k3d::persistence::proxy(m_u_power));
enable_serialization(k3d::persistence::proxy(m_v_power));
register_property(m_u_segments);
register_property(m_v_segments);
register_property(m_radius);
register_property(m_u_power);
register_property(m_v_power);
m_material.changed_signal().connect(SigC::slot(*this, &poly_sphere_implementation::on_reset_geometry));
m_u_segments.changed_signal().connect(SigC::slot(*this, &poly_sphere_implementation::on_reset_geometry));
m_v_segments.changed_signal().connect(SigC::slot(*this, &poly_sphere_implementation::on_reset_geometry));
m_radius.changed_signal().connect(SigC::slot(*this, &poly_sphere_implementation::on_reset_geometry));
m_u_power.changed_signal().connect(SigC::slot(*this, &poly_sphere_implementation::on_reset_geometry));
m_v_power.changed_signal().connect(SigC::slot(*this, &poly_sphere_implementation::on_reset_geometry));
m_output_mesh.need_data_signal().connect(SigC::slot(*this, &poly_sphere_implementation::on_create_geometry));
}
void on_reset_geometry()
{
m_output_mesh.reset();
}
k3d::mesh* on_create_geometry()
{
std::auto_ptr<k3d::mesh> mesh(new k3d::mesh());
mesh->polyhedra.push_back(new k3d::polyhedron());
k3d::polyhedron& polyhedron = *mesh->polyhedra.back();
polyhedron.material = m_material.interface();
// Create the sphere body ...
const k3d::grid_results_t grid = k3d::add_grid(*mesh, polyhedron, m_v_segments.property_value(), m_u_segments.property_value(), false, true);
const boost::multi_array<k3d::point*, 2>& points = boost::get<0>(grid);
const boost::multi_array<k3d::split_edge*, 3>& edges = boost::get<1>(grid);
// const boost::multi_array<k3d::face*, 2>& faces = boost::get<2>(grid);
/*
for(unsigned long v = 0; v != edges.shape()[0]; ++v)
{
for(unsigned long col = 0; col != edges.shape()[1]; ++col)
{
for(unsigned long i = 0; i != 4; ++i)
std::cerr << v << ", " << col << ", " << i << ": " << edges[v][col][i]->companion << std::endl;
}
}
*/
// Define the shape of the sphere ...
const unsigned long point_v_segments = points.shape()[0];
const unsigned long point_u_segments = points.shape()[1];
// Cap the top of the sphere so it is topologically solid
{
std::vector<k3d::split_edge*> new_edges;
for(unsigned long u = 0; u != point_u_segments; ++u)
new_edges.push_back(new k3d::split_edge(edges[0][(point_u_segments - u) % point_u_segments][0]->vertex));
for(unsigned long u = 0; u != point_u_segments; ++u)
{
new_edges[u]->face_clockwise = new_edges[(u + 1) % point_u_segments];
k3d::join_edges(*new_edges[u], *edges[0][(point_u_segments-1)-u][0]);
}
polyhedron.edges.insert(polyhedron.edges.end(), new_edges.begin(), new_edges.end());
polyhedron.faces.push_back(new k3d::face(new_edges[0]));
}
// Cap the bottom of the sphere so it is topologically solid
{
std::vector<k3d::split_edge*> new_edges;
for(unsigned long u = 0; u != point_u_segments; ++u)
new_edges.push_back(new k3d::split_edge(edges[point_v_segments-2][u][3]->vertex));
for(unsigned long u = 0; u != point_u_segments; ++u)
{
new_edges[u]->face_clockwise = new_edges[(u + 1) % point_u_segments];
k3d::join_edges(*new_edges[u], *edges[point_v_segments-2][u][2]);
}
polyhedron.edges.insert(polyhedron.edges.end(), new_edges.begin(), new_edges.end());
polyhedron.faces.push_back(new k3d::face(new_edges[0]));
}
// Shape the sphere points
const double radius = m_radius.property_value();
const double u_power = m_u_power.property_value();
const double v_power = m_v_power.property_value();
const double inv_u_power = u_power ? 1.0 / u_power : 1.0;
const double inv_v_power = v_power ? 1.0 / v_power : 1.0;
for(unsigned long v = 0; v != point_v_segments; ++v)
{
const double phi = k3d::pi() * static_cast<double>(v) / static_cast<double>(point_v_segments - 1);
// const double varying_radius = radius * sin(phi);
const double varying_radius = k3d::mix(radius * 0.001, radius, sin(phi));
double z = cos(phi);
z = radius * k3d::sign(z) * std::pow(std::abs(z), inv_v_power);
for(unsigned long u = 0; u != point_u_segments; ++u)
{
const double theta = k3d::pi_times_2() * static_cast<double>(u) / static_cast<double>(point_u_segments);
double x = cos(theta);
double y = -sin(theta);
x = varying_radius * k3d::sign(x) * std::pow(std::abs(x), inv_u_power);
y = varying_radius * k3d::sign(y) * std::pow(std::abs(y), inv_u_power);
points[v][u]->position = k3d::vector3(x, y, z);
}
}
return_val_if_fail(is_valid(polyhedron), 0);
assert_warning(is_solid(polyhedron));
return mesh.release();
}
k3d::iplugin_factory& factory()
{
return get_factory();
}
static k3d::iplugin_factory& get_factory()
{
static k3d::plugin_factory<k3d::document_plugin<poly_sphere_implementation>, k3d::interface_list<k3d::imesh_source > > factory(
k3d::uuid(0x919c3786, 0x619e4e84, 0xb4ad868f, 0x1e77e67c),
"PolySphere",
"Generates a polygonal sphere",
"Objects",
k3d::iplugin_factory::STABLE);
return factory;
}
private:
k3d_measurement_property(unsigned long, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::with_constraint) m_u_segments;
k3d_measurement_property(unsigned long, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::with_constraint) m_v_segments;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_radius;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_u_power;
k3d_measurement_property(double, k3d::immutable_name, k3d::change_signal, k3d::with_undo, k3d::local_storage, k3d::no_constraint) m_v_power;
};
/////////////////////////////////////////////////////////////////////////////
// poly_sphere_factory
k3d::iplugin_factory& poly_sphere_factory()
{
return poly_sphere_implementation::get_factory();
}
} // namespace libk3dmesh
|
