package randPlanets;

import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Random;

public class Main {

    static int numPlanets = 100;

    static double maxCoordinate = 100;
    static double maxVel = 100;
    static double maxMass = 100;

    static boolean constMass = true;

    /**
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) throws IOException {

        PrintWriter out = new PrintWriter(new FileWriter("Planets.txt"));

        Random generator = new Random();

        for (int i = 0; i < numPlanets; i++) {

            double x, y, z;

            x = negative() * Math.random() * maxCoordinate;
            y = negative() * Math.random() * maxCoordinate;
            z = negative() * Math.random() * maxCoordinate;

            double velx, vely, velz;

            velx = negative() * generator.nextDouble() * maxVel;
            vely = negative() * generator.nextDouble() * maxVel;
            velz = negative() * generator.nextDouble() * maxVel;

            double mass;

            if (constMass) {
                mass = maxMass;
            } else {
                mass = Math.random() * maxMass;
            }

            out.println(mass + " " + x + " " + y + " " + z + " " + velx + " "
                    + vely + " " + velz);
        }
        out.close();

    }

    static double negative() {
        double neg;

        if (Math.random() < 0.5) {
            neg = 1.0;
        } else {
            neg = -1.0;
        }
        return neg;
    }

}