//------------------------------------------------------------------------------
public static void AddPolyNodeToPolygons(PolyNode polynode, PolygonsClp polygons)
{
if (polynode.Contour.Count > 0)
polygons.Add(polynode.Contour);
foreach (PolyNode pn in polynode.Childs)
AddPolyNodeToPolygons(pn, polygons);
}
//------------------------------------------------------------------------------
public static PolygonsClp OffsetPolyLines(PolygonsClp lines,
double delta, JoinType jointype, EndType endtype,
double limit)
{
PolygonsClp result = new PolygonsClp();
//automatically strip duplicate points because it gets complicated with
//open and closed lines and when to strip duplicates across begin-end ...
PolygonsClp pts = new PolygonsClp(lines);
for (int i = 0; i < pts.Count; ++i)
{
for (int j = pts[i].Count - 1; j > 0; j--)
if (PointsEqual(pts[i][j], pts[i][j - 1]))
pts[i].RemoveAt(j);
}
if (endtype == EndType.etClosed)
{
int sz = pts.Count;
pts.Capacity = sz * 2;
for (int i = 0; i < sz; ++i)
{
PolygonClp line = new PolygonClp(pts[i]);
line.Reverse();
pts.Add(line);
}
new PolyOffsetBuilder(pts, result, true, delta, jointype, endtype, limit);
}
else
new PolyOffsetBuilder(pts, result, false, delta, jointype, endtype, limit);
return result;
}
//------------------------------------------------------------------------------
public static PolygonsClp CleanPolygons(PolygonsClp polys,
double distance = 1.415)
{
PolygonsClp result = new PolygonsClp(polys.Count);
for (int i = 0; i < polys.Count; i++)
result.Add(CleanPolygon(polys[i], distance));
return result;
}
//------------------------------------------------------------------------------
private void BuildResult(PolygonsClp polyg)
{
polyg.Clear();
polyg.Capacity = m_PolyOuts.Count;
for (int i = 0; i < m_PolyOuts.Count; i++)
{
OutRec outRec = m_PolyOuts[i];
if (outRec.pts == null) continue;
OutPt p = outRec.pts;
int cnt = PointCount(p);
if (cnt < 3) continue;
PolygonClp pg = new PolygonClp(cnt);
for (int j = 0; j < cnt; j++)
{
pg.Add(p.pt);
p = p.prev;
}
polyg.Add(pg);
}
}