public class Point3 {
  public double x,y,z;
  
  static double rot[][]=new double[3][3];
  
  public Point3(SpherePoint s) {
    x=Math.sin(s.lng)*Math.cos(s.lat);
    y=Math.cos(s.lng)*Math.cos(s.lat);
    z=Math.sin(s.lat);
  }
  
  Point3(Point3 foo) {
    x=foo.x;
    y=foo.y;
    z=foo.z;
  }

  Point3(double a,double b, double c) {
    x=a; y=b; z=c;
  }
  
  public String toString() {
    return x+" "+y+" "+z;
  }
  
  public static void setRotz(double theta) {
    rot[0][0]=Math.cos(theta);
    rot[0][1]=Math.sin(theta);
    rot[1][0]=-Math.sin(theta);
    rot[1][1]=Math.cos(theta);
    rot[2][2]=1.0;
  }
  
  public void rotate() {
    double a=rot[0][0]*x+rot[0][1]*y+rot[0][2]*z;
    double b=rot[1][0]*x+rot[1][1]*y+rot[1][2]*z;
    double c=rot[2][0]*x+rot[2][1]*y+rot[2][2]*z;
    x=a;
    y=b;
    z=c;
  }
}