VOXELFORMAT: VXM and automation

vengi-voxel / vengi

free and open source voxel art tools - editor, thumbnailer and format converter

http://vengi-voxel.github.io/vengi/

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VOXELFORMAT: VXM and automation #81

Closed sthewissen closed 3 years ago

sthewissen commented 3 years ago

Hi there! I've been looking to automate some things when it comes to the VoxEdit VXM file format and stumbled across this tool/library. I have a bunch of VOX files & I've been trying to understand the format and how to bulk adjust things.

Save existing VOX file to VXM - I saw voxconvert doesn't support VXM
Change the bounding box for the VXM file programmatically - I saw these are a few bytes near the start of the file. However, it looks like the geometry is indexed and adjusting these values also requires shifting geometry?
Adjust the pivot programmatically - I saw these are a few bytes near the start of the file.

I'd love to hear from you how much, if anything, can be done with the tooling you've developed.

mgerhardy commented 3 years ago

Currently only the loading part of vxm (and vxr) is reversed. Saving is not yet implemented [1]. So converting from vxm (or vxr) to vox is no problem - but the other way around is not yet done.

Changing the bbox (either increase - or decrease with losing voxels) would be possible. If that is needed a command line option could get easily exposed.

Adjusting the pivot is also possible - but also here, not yet exposed as command line option.

As I see it, there are these feature requests here

[x] save vxm
[x] vxr
[ ] adjust the bbox
[x] shift the voxel (adjust the pivot)

Feel free to open three tickets for them and I will implement them as soon as I find the time.

[1] https://github.com/mgerhardy/engine/blob/master/src/modules/voxelformat/VXMFormat.cpp#L29

mgerhardy commented 3 years ago

And if you are looking for the vox loading/saving code: https://github.com/mgerhardy/engine/blob/master/src/modules/voxelformat/VoxFormat.cpp

But there is an open issue with the layers:

https://github.com/mgerhardy/engine/issues/68

mgerhardy commented 3 years ago

bb889a5045de79d57315efe4dd32863d0b82af8f implemented vxm saving. but vxr is still missing - so currently all volumes will get merged into one if you convert from vox to vxm

mgerhardy commented 3 years ago

Oh btw. if you have voxedit running - it would be cool if you could import this vox file: https://github.com/mgerhardy/engine/blob/master/data/tests/rgb.vox and export and attach it as vxm (zipped) here.

mgerhardy commented 3 years ago

Content.vxm.zip

sthewissen commented 3 years ago

Oh btw. if you have voxedit running - it would be cool if you could import this vox file: https://github.com/mgerhardy/engine/blob/master/data/tests/rgb.vox and export and attach it as vxm (zipped) here.

I've tried this, but importing it crashes VoxEdit. Unfortunately 😅 Probably because there are no volumes or anything in there (from what I can tell opening it in MagicaVoxel).

sthewissen commented 3 years ago

Made two new requests for the pivot and bounding box setting.

mgerhardy commented 3 years ago

Closing this issue as the two new issues were created.