import java.util.*;
import java.lang.Math;
import java.security.SecureRandom;
public class generator {
private final int MIN_UE_N = 20;
private final int MAX_UE_N = 200;
private final double ROOM_SZ = 20;
private final double C_NS = 0.299792458;
private final double TOA_OFFSET = 200;
private int n;
private double[][] bs;
private double[][] ue;
private double[][] toa;
private Random random;
private int randomInt(int lower, int upper) {
return lower + random.nextInt(upper - lower + 1);
}
private double randomDouble(double lower, double upper) {
return lower + random.nextDouble() * (upper - lower);
}
private void generate(Long seed) {
random = seed != null ? new Random(seed) : new SecureRandom();
n = randomInt(MIN_UE_N, MAX_UE_N);
double nlos_prob = randomDouble(0, 0.5);
double nlos_err_max = randomDouble(5, 50);
double toa_std = randomDouble(0, 5);
bs = new double[4][];
bs[0] = new double[2];
bs[0][0] = (randomDouble(0, 1) - 1.0) * ROOM_SZ / 2;
bs[0][1] = (randomDouble(0, 1) - 1.0) * ROOM_SZ / 2;
bs[1] = new double[2];
bs[1][0] = randomDouble(0, 1) * ROOM_SZ / 2;
bs[1][1] = (randomDouble(0, 1) - 1.0) * ROOM_SZ / 2;
bs[2] = new double[2];
bs[2][0] = (randomDouble(0, 1) - 1.0) * ROOM_SZ / 2;
bs[2][1] = randomDouble(0, 1) * ROOM_SZ / 2;
bs[3] = new double[2];
bs[3][0] = randomDouble(0, 1) * ROOM_SZ / 2;
bs[3][1] = randomDouble(0, 1) * ROOM_SZ / 2;
ue = new double[n][];
for (int i = 0; i < n; ++i) {
ue[i] = new double[2];
ue[i][0] = (randomDouble(0, 1) - 0.5) * ROOM_SZ;
ue[i][1] = (randomDouble(0, 1) - 0.5) * ROOM_SZ;
}
for (int i = 0; i < 4; ++i)
for (int j = 0; j < 2; ++j)
bs[i][j] = Math.round(bs[i][j] * 1000.0) / 1000.0;
for (int i = 0; i < n; ++i)
for (int j = 0; j < 2; ++j)
ue[i][j] = Math.round(ue[i][j] * 1000.0) / 1000.0;
toa = new double[n][];
for (int i = 0; i < n; ++i) {
toa[i] = new double[4];
double toa_offset = randomDouble(0, TOA_OFFSET);
for (int j = 0; j < 4; ++j) {
toa[i][j] = Math.sqrt((ue[i][0]-bs[j][0])*(ue[i][0]-bs[j][0]) + (ue[i][1]-bs[j][1])*(ue[i][1]-bs[j][1])) / C_NS;
toa[i][j] += toa_offset;
if (randomDouble(0, 1) < nlos_prob) {
toa[i][j] += randomDouble(0, nlos_err_max);
}
toa[i][j] += randomDouble(0, toa_std);
}
}
}
private void printInput() {
System.out.println(n);
System.out.printf("%.3f %.3f\n", bs[0][0], bs[0][1]);
System.out.printf("%.3f %.3f\n", bs[1][0], bs[1][1]);
for (int i = 0; i < n; i++)
System.out.printf("%.3f %.3f %.3f %.3f\n", toa[i][0], toa[i][1], toa[i][2], toa[i][3]);
}
private void printActual() {
System.out.printf("%.3f %.3f\n", bs[0][0], bs[0][1]);
System.out.printf("%.3f %.3f\n", bs[1][0], bs[1][1]);
System.out.printf("%.3f %.3f\n", bs[2][0], bs[2][1]);
System.out.printf("%.3f %.3f\n", bs[3][0], bs[3][1]);
for (int i = 0; i < n; i++)
System.out.printf("%.3f %.3f\n", ue[i][0], ue[i][1]);
}
public static void main(String args[]) {
Long seed = null;
if (args.length > 0) {
seed = Long.parseLong(args[0]);
}
generator g = new generator();
g.generate(seed);
g.printInput();
//g.printActual();
}
}
