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plot_ic.cpp
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plot_ic.cpp
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#include <iostream>
#include <cstring>
#include <vector>
#include <random>
#include <deque>
#include <limits>
#include "unistd.h"
#include "fcntl.h"
#include "sys/stat.h"
//---------------------------------------------------------------------------
void plot(const std::vector<double> &parts, long n_parts,
const std::vector<double> &m,
const std::vector<double> &x, const std::vector<double> &y,
const std::vector<double> &u, const std::vector<double> &v,
const std::vector<double> &c, const std::vector<double> &o)
{
long nt = x.size();
std::cout << "import numpy as np" << std::endl
<< "import matplotlib.pyplot as plt" << std::endl
<< "from matplotlib.patches import Rectangle" << std::endl;
std::cout << "x = np.array([";
for (long i = 0; i < nt; ++i)
{
std::cout << x[i] << ", ";
}
std::cout << "])" << std::endl;
std::cout << "y = np.array([";
for (long i = 0; i < nt; ++i)
{
std::cout << y[i] << ", ";
}
std::cout << "])" << std::endl;
std::cout << "u = np.array([";
for (long i = 0; i < nt; ++i)
{
std::cout << u[i] << ", ";
}
std::cout << "])" << std::endl;
std::cout << "v = np.array([";
for (long i = 0; i < nt; ++i)
{
std::cout << v[i] << ", ";
}
std::cout << "])" << std::endl;
std::cout << "c = np.array([";
for (long i = 0; i < nt; ++i)
{
std::cout << c[i] << ", ";
}
std::cout << "])" << std::endl;
std::cout << "o = np.array([";
for (long i = 0; i < nt; ++i)
{
std::cout << o[i] << ", ";
}
std::cout << "])" << std::endl;
std::cout << "plt.scatter(x,y, c=o, alpha=0.7)" << std::endl
<< "plt.quiver(x,y, u,v)" << std::endl;
for (long i = 0; i < n_parts; ++i)
{
const double *pi = parts.data() + 4*i;
std::cout << "plt.gca().add_patch(Rectangle((" << pi[0] << ", " << pi[2] << "), "
<< pi[1] - pi[0] << ", " << pi[3] - pi[2]
<< ", edgecolor='red', facecolor='none', lw=2))" << std::endl;
}
std::cout << "plt.axis('square')" << std::endl
<< "plt.show()" << std::endl;
}
/// read n elements of type T
template <typename T>
int readn(int fh, T *buf, size_t n)
{
ssize_t ierr = 0;
ssize_t nb = n*sizeof(T);
if ((ierr = read(fh, buf, nb)) != nb)
{
std::cerr << "Failed to read " << n << " elements of size "
<< sizeof(T) << std::endl << strerror(errno) << std::endl;
return -1;
}
return 0;
}
// --------------------------------------------------------------------------
int read(const std::string &idir, std::vector<double> &parts, long &n)
{
std::string fn = idir + "/patches.npp";
int h = open(fn.c_str(), O_RDONLY);
if (h < 0)
{
std::cerr << "Failed to open \"" << fn << "\"" << std::endl
<< strerror(errno) << std::endl;
return -1;
}
n = 0;
if (readn(h, &n, 1 ))
{
std::cerr << "Failed to read \"" << fn << "\"" << std::endl;
close(h);
return -1;
}
parts.resize(4*n);
if (readn(h, parts.data(), 4*n ))
{
std::cerr << "Failed to read \"" << fn << "\"" << std::endl;
close(h);
return -1;
}
close(h);
return 0;
}
// --------------------------------------------------------------------------
int read(const std::string &idir, long np,
std::vector<double> &m, std::vector<double> &x,
std::vector<double> &y, std::vector<double> &u,
std::vector<double> &v, std::vector<double> &c,
std::vector<double> &o)
{
for (long j = 0; j < np; ++j)
{
std::string fn = idir + "/patch_data_" + std::to_string(j) + ".npp";
int h = open(fn.c_str(), O_RDONLY);
if (h < 0)
{
std::cerr << "Failed to open \"" << fn << "\"" << std::endl
<< strerror(errno) << std::endl;
return -1;
}
long n = 0;
if (readn(h, &n, 1 ))
{
std::cerr << "Failed to read \"" << fn << "\"" << std::endl;
close(h);
return -1;
}
if (n)
{
std::vector<double> tm(n);
std::vector<double> tx(n);
std::vector<double> ty(n);
std::vector<double> tu(n);
std::vector<double> tv(n);
std::vector<double> tc(n);
std::vector<double> to(n,j);
if (readn(h, tm.data(), n ) ||
readn(h, tx.data(), n ) || readn(h, ty.data(), n ) ||
readn(h, tu.data(), n ) || readn(h, tv.data(), n ) ||
readn(h, tc.data(), n ))
{
std::cerr << "Failed to read \"" << fn << "\"" << std::endl;
close(h);
return -1;
}
m.insert(m.end(), tm.begin(), tm.end());
x.insert(x.end(), tx.begin(), tx.end());
y.insert(y.end(), ty.begin(), ty.end());
u.insert(u.end(), tu.begin(), tu.end());
v.insert(v.end(), tv.begin(), tv.end());
c.insert(c.end(), tc.begin(), tc.end());
o.insert(o.end(), to.begin(), to.end());
}
close(h);
}
return 0;
}
int main(int argc, char **argv)
{
std::string idir = argv[1];
long n_parts = 0;
std::vector<double> parts;
read(idir, parts, n_parts);
std::vector<double> m;
std::vector<double> x;
std::vector<double> y;
std::vector<double> u;
std::vector<double> v;
std::vector<double> c;
std::vector<double> o;
read(idir, n_parts, m,x,y,u,v,c,o);
plot(parts, n_parts, m,x,y,u,v,c,o);
return 0;
}