/// <summary>
/// Adds a chain of links as a part to a shape
/// </summary>
/// <param name="l">chain</param>
/// <param name="shape"></param>
/// <param name="partindex"></param>
/// <param name="pointindex"></param>
/// <returns>true iff no eror</returns>
private bool addChainToShape(List <Link> l, MapWinGIS.Shape shape,
ref int partindex, ref int pointindex)
{
if (!shape.InsertPart(pointindex, ref partindex))
{
return(false);
}
partindex++;
Polygon.rotate(l);
Link l0 = l[0];
MapWinGIS.Point p0;
p0 = linkToPoint(l0);
if (!shape.InsertPoint(p0, ref pointindex))
{
return(false);
}
pointindex++;
Direction lastDir = l0.dir;
for (int i = 1; i < l.Count; i++)
{
Link nextLink = l[i];
if (nextLink.dir != lastDir)
{
// next link has a new direction, so include its start point
if (!shape.InsertPoint(linkToPoint(nextLink), ref pointindex))
{
return(false);
}
pointindex++;
}
lastDir = nextLink.dir;
}
// close the polygon
if (!shape.InsertPoint(p0, ref pointindex))
{
return(false);
}
pointindex++;
return(true);
}
