Add Drag to Boat

Drag.cs

public void AddDrag(float area, Vector3 crossProduct, Vector3 centerPoint)
    {
        if (boatRB.velocity != Vector3.zero)
        {
            var angle = Vector3.Angle(crossProduct, boatRB.velocity);
            if(angle> -90 && angle < 90)
            {
                angle = Mathf.Abs(angle);
                var areaFactor = Mathf.Clamp(angle, 1, 0);
                float dragForce = boatRB.velocity.magnitude * boatRB.velocity.magnitude;
                Vector3 drag = (boatRB.velocity * -1)* 0.5f * density * dragForce * (area * areaFactor);
                boatRB.AddForceAtPosition(drag, centerPoint);
            }
        }
    }