public class WTrsf extends Object
{
  public double mag = 1;
  public double xoff;
  public double yoff;
  public WTrsf(double amag, double anxoff, double ayoff)
  {
    mag = amag;
    xoff = anxoff;
    yoff = ayoff;
  }
  public int x(double xv)
  {
    return (int) (mag * xv + xoff);
  }
  public int y(double yv)
  {
    return (int) (mag * yv + yoff);
  }
  public int r(double rv)
  {
    return (int) (mag * rv);
  }
  public double xi(int xv)
  {
    return (xv - xoff) / mag;
  }
  public double yi(int yv)
  {
    return (yv - yoff) / mag;
  }
  public double ri(int rv)
  {
    return rv / mag;
  }
}