ObjectCurrentSegmentAngle returns the angle in radians of the current segment of an object. The angle is measured in the counterclockwise direction relative to the grid with zero in the direction of positive X_Prime. In the side view, zero is in the direction of positive Y. For SUTRA and MODFLOW 6 DISV models, the angle is measured relative to the X-axis.
ObjectCurrentSegmentAngle can range from +Pi to -Pi.
