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
|
// Delaunay Triangulation of a set of 3D points in the xy-plane.
// (Terrain triangulation)
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/IO/Verbose_ostream.h>
#include <CGAL/IO/OFF.h>
#include <CGAL/boost/graph/IO/OFF.h>
#include <CGAL/Projection_traits_xy_3.h>
#include <CGAL/Triangulation_2.h>
#include <CGAL/Delaunay_triangulation_2.h>
#include <CGAL/boost/graph/graph_traits_Delaunay_triangulation_2.h>
#include <CGAL/boost/graph/graph_traits_Triangulation_2.h>
#include <cstddef>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <fstream>
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef CGAL::Point_3<Kernel> Point_3;
typedef CGAL::Projection_traits_xy_3<Kernel> Gt;
typedef CGAL::Triangulation_2<Gt> Triangulation;
typedef CGAL::Delaunay_triangulation_2<Gt> Delaunay_triangulation;
bool verbose = false;
bool delaunay = false;
bool incr = false;
// main function with standard unix commandline arguments
// ------------------------------------------------------
int main( int argc, char **argv) {
int n = 0; // number of filenames
char *filename[2];
bool help = false;
for (int i = 1; i < argc; i++) { // check commandline options
if ( strcmp( "-v", argv[i]) == 0)
verbose = true;
else if ( strcmp( "-delaunay", argv[i]) == 0)
delaunay = true;
else if ( strcmp( "-incr", argv[i]) == 0)
incr = true;
else if ( (strcmp( "-h", argv[i]) == 0) ||
(strcmp( "-help", argv[i]) == 0))
help = true;
else if ( n < 2 ) {
filename[ n++] = argv[i];
} else {
++n;
break;
}
}
if ((n > 2) || help) {
if ( ! help)
std::cerr << "Error: in parameter list" << std::endl;
std::cerr << "Usage: " << argv[0] << " [<options>] [<infile> [<outfile>]]"
<< std::endl;
std::cerr << " Terrain triangulation in the xy-plane." << std::endl;
std::cerr << " -delaunay Delaunay triangulation (triangulation otherwise)." << std::endl;
std::cerr << " -incr Incremental insertion (no flips)." << std::endl;
std::cerr << " -v verbose." << std::endl;
exit( ! help);
}
CGAL::Verbose_ostream vout( verbose);
vout << argv[0] << ": verbosity on." << std::endl;
const char* iname = "cin";
std::istream* p_in = &std::cin;
std::ifstream in;
if ( n > 0) {
in.open( filename[0]);
p_in = ∈
iname = filename[0];
}
if ( !*p_in) {
std::cerr << argv[0] << ": error: cannot open file '" << iname
<< "' for reading." << std::endl;
exit(1);
}
CGAL::File_scanner_OFF scanner( * p_in, true);
if ( !*p_in)
exit(1);
const char* oname = "cout";
std::ostream* p_out = &std::cout;
std::ofstream out;
if ( n > 1) {
out.open( filename[1]);
p_out = &out;
oname = filename[1];
}
if ( !*p_out) {
std::cerr << argv[0] << ": error: cannot open file '"<< oname
<< "' for writing." << std::endl;
exit(1);
}
if ( delaunay)
{
Delaunay_triangulation triang;
if (incr)
{
vout << "Scanning and triangulating ... " << std::flush;
for ( std::size_t j = 0; j < scanner.size_of_vertices(); j++) {
double x, y, z;
scanner.scan_vertex( x, y, z);
Point_3 p( x, y, z);
triang.insert( p);
}
}
else
{
vout << "Scanning ... " << std::flush;
std::vector<Point_3> points;
for ( std::size_t j = 0; j < scanner.size_of_vertices(); j++) {
double x, y, z;
scanner.scan_vertex( x, y, z);
points.push_back(Point_3(x, y, z));
}
vout << "done." << std::endl;
vout << "Triangulating ... " << std::flush;
triang.insert(points.begin(), points.end());
}
vout << " done." << std::endl;
vout << "write_triangulation(" << oname << ") ... " << std::flush;
CGAL::IO::write_OFF(*p_out, triang);
vout << "done." << std::endl;
} else {
Triangulation triang;
if(incr)
{
vout << "Scanning and triangulating ... " << std::flush;
for ( std::size_t j = 0; j < scanner.size_of_vertices(); j++) {
double x, y, z;
scanner.scan_vertex( x, y, z);
Point_3 p( x, y, z);
triang.insert( p);
}
}
else
{
vout << "Scanning ... " << std::flush;
std::vector<Point_3> points;
for ( std::size_t j = 0; j < scanner.size_of_vertices(); j++) {
double x, y, z;
scanner.scan_vertex( x, y, z);
points.push_back(Point_3( x, y, z));
}
vout << "done." << std::endl;
vout << "Triangulating ... " << std::flush;
triang.insert(points.begin(), points.end());
}
vout << "done." << std::endl;
vout << "write_triangulation(" << oname << ") ... " << std::flush;
CGAL::IO::write_OFF(*p_out, triang);
vout << "done." << std::endl;
}
if ( !*p_in) {
std::cerr << argv[0] << " read error: while reading file '"<< iname << "'."
<< std::endl;
std::exit(1);
}
if ( !*p_out) {
std::cerr << argv[0] << " write error: while writing file '"<< oname << "'."
<< std::endl;
exit(1);
}
return 0;
}
|
