f070e018e143ff5a64dc9dfb9d1ada6cf6157976,src/org/opensourcephysics/cabrillo/tracker/CalibrationStep.java,CalibrationStep,setWorldCoordinates,#number#number#number#number#,195

Before Change


   */
  public boolean setWorldCoordinates(double x1, double y1, double x2, double y2) {
  	TTrack track = getTrack();
    if (track.isLocked()) return false;
    // points can't share the same world position
    boolean sameX = x2==x1;
    boolean sameY = y2==y1;

After Change


   */
  public boolean setWorldCoordinates(double x1, double y1, double x2, double y2) {
  	TTrack track = getTrack();
    if (track==null || track.isLocked()) return false;
    // points can't share the same world position
    boolean sameX = x2==x1;
    boolean sameY = y2==y1;