public static Vector2D rotate(Vector2D origin,Vector2D point, double theta){
      double s = Math.sin(theta);
      double c = Math.cos(theta);
      // get the deltaX and deltaY
      point.x -= origin.x;   
       point.y -= origin.y;   

       // rotate point   
         double xnew = point.x * c - point.y * s;   
       double ynew = point.x * s + point.y * c; 

       // translate point back to global coords:
       Vector2D TranslatedPoint = new Vector2D(0,0);
       TranslatedPoint.x = xnew + origin.x;  
       TranslatedPoint.y = ynew + origin.y; 

       return TranslatedPoint;
       
   }