Support Hatch entities

[kurtlawrence]

Hi there,

Would it be possible to get support for hatch entities?
This output comes from QGIS.

example.zip

[brettfo]

HATCH entities are really complex and while eventually I'll add support for them, it's not something that'll likely happen soon, purely due to lack of time.

I'll keep this issue open, though, until they are implemented.

[guradia]

Aye!

I just came around the need to work with DXF-Files including Hatches. At least two different usages are there to play with and currently i'm just seeking to parse them.
Some pointers would be nice as to where to start implementing them inside the library.

XML-Definitions for a generator and Structs that could be generated or handcrafted are easy to stumble upon ... but the intricate coupling of things.

Perhaps an overview of how a simple Line-Entity journeys from spec to usable form, could be written down without too much hassle for you.

[brettfo]

I also maintain a C#/.NET DXF reader/writer that has limited support for HATCH entities. The relevant sources are:

• XML definition
• source definition 1
• source definition 2
• source definition 3

[jannewulf]

Are there any plans to add support for this?

[brettfo]

@jannewulf I mentioned in this comment that eventually I'd like to add support for them, but there is no timeline on that.

[DennisJensen95]

This would be awesome, i tried 30 minutes of trying to wrap my head around it and implemented some of the XML spec and generated the code. But I gave up and opted out of Hatch for now, would be lovely to implement it, but fully understand that time is constrained resource 👍

[brettfo]

I have some limited support for HATCH entities in the C# version of DXF files. That repo is here https://github.com/ixmilia/dxf but there was a lot of custom/manual code required for this; it's not a simple process. If you wanted to attempt that feature in this repo, that would be a good place for pointers.