anchor.diff:    void rotateDirectionsAngles(num angles) {
       rotateDirectionsRadians(_makeRadians(angles));
     }
  -  
  +
   //=============================================================================
   
     num _makeRadians(num angles) => angles * (Math.PI / 180);
  
positive.code:   static const int _MAX_LENGTH_FOR_MAIN_DIRECTION = 1;
  
    static const double _MAX_LENGTH_WITH_PRECISION = 1.001;
    
  //=============================================================================
  
    StageXL.Vector mainDirection = new StageXL.Vector.zero();
  
negative.code: 
    StageXL.Vector downLeftDirection;
    StageXL.Vector downRightDirection;
  
  //=============================================================================
  
    DirectionSystem() {
      upLeftDirection = new StageXL.Vector(-SQRT2_2, -SQRT2_2);
      upRightDirection = new StageXL.Vector(SQRT2_2, -SQRT2_2);
  
      downLeftDirection = new StageXL.Vector(-SQRT2_2, SQRT2_2);
      downRightDirection = new StageXL.Vector(SQRT2_2, SQRT2_2);
    }
  
  //=============================================================================
  
    /**
  