Link between entities and polylines

[stevage]

Hard to pick between bug and feature request so I'll explain:

I use this library in a tool that imports DXFs from a variety of sources and converts to GeoJSON to display on a map. I need information from the raw helper.parsed.entities objects (including entity handle and layer) and other information from the output of helper.toPolylines().polylines (raw coordinates).

Generally these two arrays are synchronised, so I can loop over the entities array and use its index to get the corresponding polylines object.

But I just came across a DXF file which generates two arrays that have different numbers of elements, and hence are not aligned. There didn't seem to be any way access the information I needed without modifying the library.

In my case, it was easy to modify to include a handle property in each polyline to find the right object. But it's hacky.

There are probably lots of better options:

1. An option to include a polyline object on each parsed entity object
2. Make sure the two arrays always are aligned
3. Export the applyTransforms and entityToPolyline functions so one can simply generate the polyline for each entity as needed
4. Include the handle in the polyline object as above...