void
FlatTriangleFanTree::AcceptInRange(const FlatBoundingBox &bb,
const FlatProjection &projection,
TriangleFanVisitor &visitor) const
{
if (!bb.Overlaps(bb_children))
return;
if (bb.Overlaps(bounding_box)) {
visitor.StartFan();
for (const auto &v : vs)
visitor.AddPoint(projection.Unproject(v));
visitor.EndFan();
}
for (const auto &child : children)
child.AcceptInRange(bb, projection, visitor);
}