internal virtual bool FixRingOrientation_()
{
bool bFound = false;
if (m_fixSelfTangency)
{
bFound = FixRingSelfTangency_();
}
if (m_shape.GetPathCount(m_geometry) == 1)
{
int path = m_shape.GetFirstPath(m_geometry);
double area = m_shape.GetRingArea(path);
m_shape.SetExterior(path, true);
if (area < 0)
{
int first = m_shape.GetFirstVertex(path);
m_shape.ReverseRingInternal_(first);
m_shape.SetLastVertex_(path, m_shape.GetPrevVertex(first));
// fix
// last
// after
// the
// reverse
return(true);
}
return(false);
}
m_path_orientation_index = m_shape.CreatePathUserIndex();
// used to
// store
// discovered
// orientation
// (3 -
// extrior,
// 2 -
// interior)
m_path_parentage_index = m_shape.CreatePathUserIndex();
// used to
// resolve OGC
// order
for (int path_1 = m_shape.GetFirstPath(m_geometry); path_1 != -1; path_1 = m_shape.GetNextPath(path_1))
{
m_shape.SetPathUserIndex(path_1, m_path_orientation_index, 0);
m_shape.SetPathUserIndex(path_1, m_path_parentage_index, -1);
}
com.epl.geometry.AttributeStreamOfInt32 bunch = new com.epl.geometry.AttributeStreamOfInt32(0);
m_y_scanline = com.epl.geometry.NumberUtils.TheNaN;
com.epl.geometry.Point2D pt = new com.epl.geometry.Point2D();
m_unknown_ring_orientation_count = m_shape.GetPathCount(m_geometry);
m_node_1_user_index = m_shape.CreateUserIndex();
m_node_2_user_index = m_shape.CreateUserIndex();
for (int ivertex = m_sorted_vertices.GetFirst(m_sorted_vertices.GetFirstList()); ivertex != -1; ivertex = m_sorted_vertices.GetNext(ivertex))
{
int vertex = m_sorted_vertices.GetData(ivertex);
m_shape.GetXY(vertex, pt);
if (pt.y != m_y_scanline && bunch.Size() != 0)
{
bFound |= ProcessBunchForRingOrientationTest_(bunch);
m_sweep_comparator.Reset();
bunch.Clear(false);
}
bunch.Add(vertex);
// all vertices that have same y are added to the
// bunch
m_y_scanline = pt.y;
if (m_unknown_ring_orientation_count == 0)
{
break;
}
}
if (m_unknown_ring_orientation_count > 0)
{
bFound |= ProcessBunchForRingOrientationTest_(bunch);
bunch.Clear(false);
}
m_shape.RemoveUserIndex(m_node_1_user_index);
m_shape.RemoveUserIndex(m_node_2_user_index);
// dbg_verify_ring_orientation_();//debug
for (int path_2 = m_shape.GetFirstPath(m_geometry); path_2 != -1;)
{
if (m_shape.GetPathUserIndex(path_2, m_path_orientation_index) == 3)
{
// exterior
m_shape.SetExterior(path_2, true);
int afterPath = path_2;
for (int nextHole = m_shape.GetPathUserIndex(path_2, m_path_parentage_index); nextHole != -1;)
{
int p = m_shape.GetPathUserIndex(nextHole, m_path_parentage_index);
m_shape.MovePath(m_geometry, m_shape.GetNextPath(afterPath), nextHole);
afterPath = nextHole;
nextHole = p;
}
path_2 = m_shape.GetNextPath(afterPath);
}
else
{
m_shape.SetExterior(path_2, false);
path_2 = m_shape.GetNextPath(path_2);
}
}
m_shape.RemovePathUserIndex(m_path_orientation_index);
m_shape.RemovePathUserIndex(m_path_parentage_index);
return(bFound);
}