public static CgmRectangle GetRectangle(Polyline polyline)
{
if (IsRectangle(polyline))
{
var points = polyline.Points;
// rectangle is descriped counter clock-wise starting right
if (CgmPoint.IsSame(points[0].Y, points[1].Y) && CgmPoint.IsSame(points[1].X, points[2].X) && CgmPoint.IsSame(points[2].Y, points[3].Y))
{
if (points[1].Y < points[2].Y)
{
return(CgmRectangle.FromPoints(points[1], points[0], points[2], points[3]));
}
else if (points[0].X < points[1].X) // starting left
{
return(CgmRectangle.FromPoints(points[3], points[2], points[0], points[1]));
}
else
{
return(CgmRectangle.FromPoints(points[2], points[3], points[1], points[0]));
}
}
// rectangle is described clock wise
if (CgmPoint.IsSame(points[0].X, points[1].X) && CgmPoint.IsSame(points[1].Y, points[2].Y) && CgmPoint.IsSame(points[2].X, points[3].X))
{
return(CgmRectangle.FromPoints(points[4], points[0], points[3], points[1]));
}
}
return(CgmRectangle.Empty);
}
public CgmRectangle ToRectangle()
{
return(CgmRectangle.FromPoints(_topLine.A, _topLine.B, _leftLowerCorner, _rightLowerCorner));
}