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
|
/*
* KSeg
* Copyright (C) 1999-2006 Ilya Baran
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Send comments and/or bug reports to:
* ibaran@mit.edu
*/
#include "G_polygon.H"
#include "G_drawstyle.H"
#include "KSegView.H"
#include "G_segment.H"
#include "G_line.H"
#include "G_ray.H"
//drawing:
void G_polygon::draw(QPainter &p, const G_drawstyle &d, bool selected)
{ //FIXME!
QPointArray pts(points.size());
int i;
for(i = 0; i < (int)points.size(); i++) {
if(p.device()->isExtDev() || p.hasViewXForm()) pts[i] = (points[i] * 8).toQPoint();
else pts[i] = points[i].toQPoint();
}
p.setBrush(d.getBrush());
p.setPen(QPen(Qt::NoPen));
if(p.device()->isExtDev() || p.hasViewXForm()) { //draw at higher accuracy to a printer or image
p.scale(0.125, .125);
p.drawPolygon(pts);
p.scale(8, 8);
return;
}
p.drawPolygon(pts);
if(selected) {
if(KSegView::getSelectType() == KSegView::BORDER_SELECT) {
p.setBrush(QBrush(G_drawstyle::getBorderColor(d.getBrush().color()), Qt::BDiagPattern));
}
if(selected && KSegView::getSelectType() == KSegView::BLINKING_SELECT) {
QColor c(QTime::currentTime().msec() * 17, 255, 255, QColor::Hsv);
p.setBrush(QBrush(c, Qt::BDiagPattern));
}
p.drawPolygon(pts);
}
p.setBrush(QBrush());
return;
}
G_point G_polygon::getNearestPoint(const G_point &p) const
{
QPointArray pts(points.size());
int i;
for(i = 0; i < (int)points.size(); i++) {
pts[i] = points[i].toQPoint();
}
if(QRegion(pts).contains(p.toQPoint())) return p;
return points[0];
}
bool G_polygon::inRect(const QRect &rect) const
{
if(getNearestPoint(rect.topRight()) == G_point(rect.topRight())) return true;
if(getNearestPoint(rect.topLeft()) == G_point(rect.topLeft())) return true;
if(getNearestPoint(rect.bottomRight()) == G_point(rect.bottomRight())) return true;
if(getNearestPoint(rect.bottomLeft()) == G_point(rect.bottomLeft())) return true;
int i;
for(i = 0; i < (int)points.size(); i++) {
if(G_segment(points[i], points[(i + 1) % points.size()]).inRect(rect)) return true;
}
return false;
}
double G_polygon::getArea() const
{
double area = 0;
int i;
for(i = 0; i < (int)points.size(); i++) {
area += points[i] % points[(i + 1) % points.size()];
}
return fabs(area / 2);
}
QRect G_polygon::getExtents() const
{
int i;
QRect e;
for(i = 0; i < (int)points.size(); i++) {
e |= QRect(points[i].toQPoint(), QSize(1, 1));
}
return e;
}
bool G_polygon::isValid() const
{
int i;
for(i = 0; i < (int)points.size(); i++) {
if(points[i].isValid() == false) return false;
}
return points.size() > 2;
}
void G_polygon::translate(const G_point &p)
{
int i;
for(i = 0; i < (int)points.size(); i++) {
points[i].translate(p);
}
}
void G_polygon::rotate(const G_point &p, double d)
{
int i;
for(i = 0; i < (int)points.size(); i++) {
points[i].rotate(p, d);
}
}
void G_polygon::reflect(const G_straight &s)
{
int i;
for(i = 0; i < (int)points.size(); i++) {
points[i].reflect(s);
}
}
void G_polygon::scale(const G_point &p, double d)
{
int i;
for(i = 0; i < (int)points.size(); i++) {
points[i].scale(p, d);
}
}
|
