Add draco compression support

[Siccity]

glb.zip

Originally requested by @umresh in #26 (comment)

[umresh]

Hi, When can you add the draco support. Thanks

[Siccity]

I don't know. Perhaps after I'm done with async import

[umresh]

Hi, any update on draco support.

[Siccity]

Currently in progress. I haven't had much time to work on it since I just moved.
I was trying to find a way to make plug-ins optional but it's very hard, so I might just end up hardcoding Draco support into GLTFUtility. But a problem with Google's Draco plug in is that it requires your project to allow unsafe code. I am not a fan of putting such requirements on my users.

[naveenan-alt]

Have you added support for draco compression? Some of my models that I get from client are draco compressed and they want to load it.

[mschneider]

You could precompile the DLL containing the unsafe code, this would allow you to use it without requiring the user to compile their own unsafe code.

[mschneider]

Using an assembly definition file it should also be possible to configure the unsafe flag only for a certain namespace / compilation unit. Have a look here: https://docs.unity3d.com/Manual/ScriptCompilationAssemblyDefinitionFiles.html

[Siccity]

Good call @mschneider
Marking allow unsafe on the assembly definition sounds like a great solution

[umresh]

Hey any update? Or could you point me in right direction how to do it?

[IsmaeelGoraya]

Any update on this?

[Siccity]

Unfortunately not yet, no

[leon]

We really need the draco support for our AR app.

@Siccity Would it be possible to pay you to fix it?

[Siccity]

@leon
Yes It'd be possible. Send me an email with your deadline and I'll see if I got the time for it.

[Siccity]

Draco is now finally supported! 08ec501