public Arc(Point basePoint, Point endPoint, Line normalLine)
{
if (basePoint != endPoint && !new Direction(basePoint, endPoint).IsPerpendicularTo(normalLine.Direction))
{
throw new GeometricException();
}
var projected = basePoint.ProjectOntoLine(normalLine);
if (projected == basePoint)
{
throw new GeometricException();
}
this.BasePoint = basePoint;
this.EndPoint = endPoint;
this.CenterPoint = projected;
this.NormalDirection = normalLine.Direction;
}