private List <int> DrawPolyline(LwPolyline l)
{
var ex = l.Explode();
var v = new List <Vector3Middle>();
var i = 0;
foreach (var en in ex)
{
if (en is Line line)
{
var A = line.StartPoint;
var B = line.EndPoint;
if (i == 0)
{
v.Add(new Vector3Middle(A));
v.Add(new Vector3Middle(B));
}
else
{
var L = v[v.Count - 1].Point;
// if the first entity was in wrong orientation
if (i == 1 && !L.Equals(A, Math.Pow(10, -8)) && !L.Equals(B, Math.Pow(10, -8)))
{
ReverseFcsPolyline(v);
}
// if current entity is in wrong orientation
if (!L.Equals(A, Math.Pow(10, -8)))
{
v.Add(new Vector3Middle(A));
}
else
{
v.Add(new Vector3Middle(B));
}
}
}
else if (en is Arc arc)
{
AddArcToArc(arc, i, v);
}
i++;
}
var Lc = v.Last().Point;
if (l.IsClosed && !Lc.Equals(v[0].Point, Math.Pow(10, -8)))
{
v.Add(v[0]);
}
var ids = new List <int>();
// drawing
var polyline = new List <Vector3>();
polyline.Add(v[0].Point);
for (int j = 1; j < v.Count; j++)
{
var cr = v[j];
if (cr.MiddlePoint == default)
{
polyline.Add(cr.Point);
}
else
{
if (polyline.Count > 1)
{
ids.Add(DrawCurve(polyline));
}
var A = polyline.Last();
var B = cr.Point;
var C = cr.MiddlePoint;
ids.Add(DrawArc(A, B, C));
polyline.Clear();
polyline.Add(B);
}
}
if (polyline.Count > 1)
{
ids.Add(DrawCurve(polyline));
}
return(ids);
}
private void DrawPolyline(LwPolyline l)
{
var ex = l.Explode();
EntitiesToFcs(ex);
}