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
|
#ifndef SELECTION_VISUALIZER_H
#define SELECTION_VISUALIZER_H
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Polygon_2.h>
#include <CGAL/Three/Scene_item.h>
#include <CGAL/Three/Viewer_interface.h>
#include <QPainter>
// Class for visualizing selection
// provides mouse selection functionality
class Q_DECL_EXPORT Selection_visualizer
{
private:
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef K::Point_2 Point_2;
typedef K::Point_3 Point_3;
typedef CGAL::Polygon_2<K> Polygon_2;
typedef std::vector<Point_2> Polyline_2;
typedef std::vector<Polyline_2> Polylines;
typedef CGAL::Three::Scene_item::Bbox Bbox;
bool rectangle;
std::vector<Point_2> contour_2d;
Polylines* polyline;
Bbox point_set_bbox;
Polygon_2 domain_freeform;
public:
CGAL::Bbox_2 domain_rectangle;
Selection_visualizer(bool rectangle, const Bbox& point_set_bbox)
: rectangle (rectangle), point_set_bbox (point_set_bbox)
{
polyline = new Polylines(0);
polyline->push_back(Polyline_2());
}
~Selection_visualizer() {
}
void render(QImage& image) const {
CGAL::Three::Viewer_interface* viewer = static_cast<CGAL::Three::Viewer_interface*>(*CGAL::QGLViewer::QGLViewerPool().begin());
QPen pen;
pen.setColor(QColor(Qt::green));
pen.setWidth(5);
QImage temp(image);
QPainter *painter = new QPainter(&temp);
painter->setPen(pen);
for(std::size_t i=0; i<polyline->size(); ++i)
{
Polyline_2 poly = (*polyline)[i];
if(!poly.empty())
for(std::size_t j=0; j<poly.size()-1; ++j)
{
painter->drawLine(poly[j].x(), poly[j].y(), poly[j+1].x(), poly[j+1].y());
}
}
painter->end();
delete painter;
viewer->set2DSelectionMode(true);
viewer->setStaticImage(temp);
viewer->update();
}
Polyline_2& poly() const
{ return polyline->front(); }
bool update_polyline () const
{
if (contour_2d.size() < 2 ||
(!(poly().empty()) && contour_2d.back () == poly().back()))
return false;
if (rectangle)
{
poly().clear();
poly().push_back ( Point_2 (domain_rectangle.xmin(),
domain_rectangle.ymin()));
poly().push_back ( Point_2 (domain_rectangle.xmax(),
domain_rectangle.ymin()));
poly().push_back ( Point_2 (domain_rectangle.xmax(),
domain_rectangle.ymax()));
poly().push_back ( Point_2 (domain_rectangle.xmin(),
domain_rectangle.ymax()));
poly().push_back ( Point_2 (domain_rectangle.xmin(),
domain_rectangle.ymin()));
}
else
{
if (!(poly().empty()) && contour_2d.back () == poly().back())
return false;
poly().clear();
for (unsigned int i = 0; i < contour_2d.size (); ++ i)
poly().push_back (contour_2d[i]);
}
return true;
}
void sample_mouse_path(QImage& image)
{
CGAL::QGLViewer* viewer = *CGAL::QGLViewer::QGLViewerPool().begin();
const QPoint& p = viewer->mapFromGlobal(QCursor::pos());
if (rectangle && contour_2d.size () == 2)
{
contour_2d[1] = Point_2 (p.x (), p.y ());
domain_rectangle = CGAL::bbox_2 (contour_2d.begin (), contour_2d.end ());
}
else
contour_2d.push_back (Point_2 (p.x (), p.y ()));
if (update_polyline ())
{
render(image);
}
}
void apply_path()
{
update_polyline ();
domain_rectangle = CGAL::bbox_2 (contour_2d.begin (), contour_2d.end ());
if (!rectangle)
domain_freeform = Polygon_2 (contour_2d.begin (), contour_2d.end ());
}
bool is_selected (CGAL::qglviewer::Vec& p)
{
if (domain_rectangle.xmin () < p.x &&
p.x < domain_rectangle.xmax () &&
domain_rectangle.ymin () < p.y &&
p.y < domain_rectangle.ymax ())
{
if (rectangle)
return true;
/*
* domain_freeform.has_on_bounded_side() requires the polygon to be simple, which is never the case.
* However, it works very well even if the polygon is not simple, so we use this instead to avoid
* the cgal_assertion on is_simple().*/
if (CGAL::bounded_side_2(domain_freeform.container().begin(),
domain_freeform.container().end(),
Point_2(p.x, p.y),
domain_freeform.traits_member()) == CGAL::ON_BOUNDED_SIDE)
return true;
}
return false;
}
}; // end class Selection_visualizer
#endif // SELECTION_VISUALIZER_H
|
