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| #include <QApplication>
#include <QDesktopWidget>
#include <QWidget>
#include <QPainter>
#include <QTextCodec>
#include <QString>
#include <fstream>
#include <vector>
#include <cstdlib>
#include <cmath>
#include <ctime>
#include <iostream>
class grafs
{
public:
grafs(const char* file)
{
std::ifstream in(file);
int n;
in >> n;
v.resize(n);
for (int i = 0; i < n; ++i)
{
for (int j = 0; j < n; ++j)
{
int link;
in >> link;
if (link != 0)
v[i].push_back(j);
}
}
}
grafs(int n)
{
v.resize(n);
for (int i = 0; i < n; ++i)
{
for (int j = 0; j < n; ++j)
{
int link = rand() % 100;
if (link > 85 && i != j)
v[i].push_back(j);
}
}
}
std::vector<std::vector<int> > v;
};
class myWidget : public QWidget
{
public:
myWidget (QWidget *parent = 0) : QWidget(parent),
//mag("C:/Users/Andrej/graphs/input.txt"),
mag(10),
q(mag.v.size())
{
setWindowTitle(tr("Визуализация графов"));
}
void paintEvent(QPaintEvent * = nullptr)
{
QPainter p(this);
coordinates(false);
p.setRenderHint(QPainter::Antialiasing, true);
p.setRenderHint(QPainter::TextAntialiasing, true);
p.setPen(QPen(Qt::black, std::min(size().height(),
size().width()) / 40 / q.size(),
Qt::SolidLine, Qt::FlatCap));
p.setBrush(QBrush(Qt::cyan, Qt::SolidPattern));
p.setFont(QFont("Times", 14));
radius = std::max((std::min(size().height(),
size().width()) / (14 + q.size())), 16u);
for (size_t i = 0; i != mag.v.size(); ++i)
{
for (size_t j = 0; j != mag.v[i].size(); ++j)
{
std::pair<int, int> a, b;
a = pruning(q[i].first, q[i].second,
q[mag.v[i][j]].first, q[mag.v[i][j]].second, radius);
b = pruning(q[mag.v[i][j]].first, q[mag.v[i][j]].second,
q[i].first, q[i].second, radius);
p.drawLine(a.first, a.second, b.first, b.second);
}
}
for (size_t i = 0; i != q.size(); ++i)
{
p.drawEllipse(q[i].first - radius,
q[i].second - radius, 2 * radius, 2 * radius);
QString vertices;
vertices.setNum(i + 1);
p.drawText(q[i].first - p.font().pointSize() / 4,
q[i].second + p.font().pointSize() / 2, vertices);
}
}
void coordinates(bool f = true)
{
srand(time(nullptr));
int h = size().height();
int w = size().width();
int m = std::min(w, h);
double pi = acos(-1);
for (size_t i = 0; i != q.size(); ++i)
{
if (f == true)
{
q[i].first = w / 2 + (m / exp(1)) * cos(2 * pi * i / q.size());
q[i].second = h / 2 + (m / exp(1)) * sin(2 * pi * i / q.size());
}
else
{
q[i].first = rand() % (w / 2) + w / 4;
q[i].second = rand() % (h / 2) + h / 4;
}
}
laying();
}
void laying()
{
int counter = 0;
double eps = .5;
int h = size().height();
int w = size().width();
int m = std::min(w, h);
int Length = m / q.size(), SpringConst = 0.8, ElecConst = 3, Grav = 150;
std::vector<std::pair<double, double> > fxy(q.size());
bool qw = true;
while (qw)
{
std::pair<double, double> sum, dxy;
for (size_t i = 0; i != mag.v.size(); ++i)
{
std::pair<double, double> f;
for (size_t j = 0; j != mag.v[i].size(); ++j)
{
double dist = distance(q[i].first, q[i].second,
q[mag.v[i][j]].first, q[mag.v[i][j]].second);
dxy.first = q[i].first - q[mag.v[i][j]].first;
dxy.second = q[i].second - q[mag.v[i][j]].second;
f.first += SpringConst * (dist - Length) * dxy.first / dist
+ ElecConst / (dist * dist) * dxy.first / dist;
f.second += SpringConst * (dist - Length) * dxy.second / dist
+ ElecConst / (dist * dist) * dxy.second / dist;
}
for (size_t j = 0; j != mag.v.size(); ++j)
{
if (i == j)
continue;
double dist = distance(q[i].first, q[i].second,
q[j].first, q[j].second);
dxy.first = q[i].first - q[j].first;
dxy.second = q[i].second - q[j].second;
f.first += Grav * ElecConst / (dist * dist) * dxy.first / dist;
f.second += Grav * ElecConst / (dist * dist) * dxy.second / dist;
}
fxy[i] = f;
sum.first += fabs(fxy[i].first);
sum.second += fabs(fxy[i].second);
}
for (size_t i = 0; i != q.size(); ++i)
{
double dist, kx = 200;
dist = q[i].first;
dxy.first = q[i].first;
dxy.second = q[i].second;
fxy[i].first += kx * ElecConst / (dist * dist) * dxy.first / dist;
dist = w - q[i].first;
dxy.first = w - q[i].first;
dxy.second = w - q[i].second;
fxy[i].first += kx * ElecConst / (dist * dist) * dxy.first / dist;
dist = q[i].second;
dxy.first = h - q[i].first;
dxy.second = h - q[i].second;
fxy[i].second += kx * ElecConst / (dist * dist) * dxy.second / dist;
dist = h - q[i].second;
dxy.first = h - q[i].first;
dxy.second = h - q[i].second;
fxy[i].second += kx * ElecConst / (dist * dist) * dxy.second / dist;
q[i].first += fxy[i].first /10;
q[i].second += fxy[i].second /10;
}
if (sqrt(sum.first * sum.first + sum.second * sum.second ) < eps)
break;
if (++counter > 5000)
{
qw = false;
std::cout << "error\n" << std::flush;
break;
}
}
std::cout << qw << "\n" << std::flush;
}
double distance(int x1, int y1, int x2, int y2)
{
return sqrt((x1 - x2) * (x1 - x2) +
(y1 - y2) * (y1 - y2));
}
std::pair<int,int> pruning(int x0, int y0, int x1, int y1, int r)
{
double x = x1 - x0;
double y = y1 - y0;
double a = atan(y / x);
x = x0 + r * cos(a);
y = y0 + r * sin(a);
if (distance(x, y, x1, y1) > distance(x0, y0, x1, y1))
{
x = x0 - r * cos(a);
y = y0 - r * sin(a);
}
return std::make_pair(x, y);
}
grafs mag;
std::vector<std::pair<int, int> > q;
int radius;
};
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QTextCodec *utfcodec = QTextCodec::codecForName("UTF-8");
QTextCodec::setCodecForTr(utfcodec);
QTextCodec::setCodecForCStrings(utfcodec);
myWidget window;
int x = std::min(app.desktop()->width(), app.desktop()->height()) / 2;
window.resize(x, x);
window.show();
return app.exec();
} |
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