/// <summary>
/// Returns the convex hull from a collection of XLD contours.
/// </summary>
/// <param name="from">The collection of XLD contours to be processed.</param>
/// <returns>An XLD contour that is the convex hull.</returns>
/// <example> HXLDCont convexHullXld = MyXldContours.ConvexHull (); .</example>
public static HXLDCont ConvexHull(this HXLDCont from)
{
HXLDCont tempContour = new HXLDCont(), convexHull = new HXLDCont();
HTuple cumulativeRows = new HTuple(), cumulativeColumns = new HTuple();
try
{
if (@from != null && @from.IsValid())
{
int count = @from.CountObj();
if (count > 1)
{
HTuple rows, columns;
for (int i = 1; i <= count; i++)
{
@from[i].GetContourXld(out rows, out columns);
cumulativeRows = cumulativeRows.TupleConcat(rows);
cumulativeColumns = cumulativeColumns.TupleConcat(columns);
}
tempContour.GenContourPolygonXld(
cumulativeRows,
cumulativeColumns);
convexHull = tempContour.ShapeTransXld("convex");
}
else
{
convexHull = @from.ShapeTransXld("convex");
}
}
if (convexHull.IsInitialized())
{
return(convexHull.CopyObj(1, -1));
}
else
{
return(new HXLDCont());
}
}
finally
{
tempContour.Dispose();
convexHull.Dispose();
}
}