private static bool IsOffSetValidForSide(this Curve curve, Curve offSet, SidesOfCentre side)
{
if (offSet == null)
{
return(false);
}
var start = new Point2d(curve.StartPoint.X, curve.StartPoint.Y);
var offSetVector = start.GetVectorTo(new Point2d(offSet.StartPoint.X, offSet.StartPoint.Y));
return(Math.Abs(curve.AngleFromCurveToForSide(side) - offSetVector.Angle) < RadiansHelper.ANGLE_TOLERANCE);
}