internal static com.epl.geometry.QuadTreeImpl BuildQuadTreeForPaths(com.epl.geometry.MultiPathImpl multipathImpl)
{
com.epl.geometry.Envelope2D extent = new com.epl.geometry.Envelope2D();
multipathImpl.QueryLooseEnvelope2D(extent);
if (extent.IsEmpty())
{
return(null);
}
com.epl.geometry.QuadTreeImpl quad_tree_impl = new com.epl.geometry.QuadTreeImpl(extent, 8);
int hint_index = -1;
com.epl.geometry.Envelope2D boundingbox = new com.epl.geometry.Envelope2D();
bool resized_extent = false;
do
{
for (int ipath = 0, npaths = multipathImpl.GetPathCount(); ipath < npaths; ipath++)
{
multipathImpl.QueryPathEnvelope2D(ipath, boundingbox);
hint_index = quad_tree_impl.Insert(ipath, boundingbox, hint_index);
if (hint_index == -1)
{
if (resized_extent)
{
throw com.epl.geometry.GeometryException.GeometryInternalError();
}
//This is usually happens because esri shape buffer contains geometry extent which is slightly different from the true extent.
//Recalculate extent
multipathImpl.CalculateEnvelope2D(extent, false);
resized_extent = true;
quad_tree_impl.Reset(extent, 8);
break;
}
else
{
//break the for loop
resized_extent = false;
}
}
}while (resized_extent);
return(quad_tree_impl);
}
internal static com.epl.geometry.QuadTreeImpl BuildQuadTree(com.epl.geometry.MultiPathImpl multipathImpl, com.epl.geometry.Envelope2D extentOfInterest)
{
com.epl.geometry.Envelope2D extent = new com.epl.geometry.Envelope2D();
multipathImpl.QueryLooseEnvelope2D(extent);
com.epl.geometry.QuadTreeImpl quad_tree_impl = new com.epl.geometry.QuadTreeImpl(extent, 8);
int hint_index = -1;
com.epl.geometry.Envelope2D boundingbox = new com.epl.geometry.Envelope2D();
com.epl.geometry.SegmentIteratorImpl seg_iter = multipathImpl.QuerySegmentIterator();
bool resized_extent = false;
while (seg_iter.NextPath())
{
while (seg_iter.HasNextSegment())
{
com.epl.geometry.Segment segment = seg_iter.NextSegment();
int index = seg_iter.GetStartPointIndex();
segment.QueryEnvelope2D(boundingbox);
if (boundingbox.IsIntersecting(extentOfInterest))
{
hint_index = quad_tree_impl.Insert(index, boundingbox, hint_index);
if (hint_index == -1)
{
if (resized_extent)
{
throw com.epl.geometry.GeometryException.GeometryInternalError();
}
// resize extent
multipathImpl.CalculateEnvelope2D(extent, false);
resized_extent = true;
quad_tree_impl.Reset(extent, 8);
seg_iter.ResetToFirstPath();
break;
}
}
}
}
return(quad_tree_impl);
}