Note this code is highly theorical, I could not get to test it really (other apps I have access to also fail at importing FBX anim generated from collada by FBXConverter :( ).

For now, only basic (loc/rot/scale) of objects is implemented. Will wait for other testers' feedback before going any further.

FBX: since we have more and more options differing between new 7.4 and legacy 6.1, add a draw() func (temp, to be removed once we get rid of 6.1).

Finally understood a bit better Property format (name, type, kind_of_label?, flags, data, ...).
So needed to handle flags properly (currently, only aware of 'A'nimatable and 'U'ser-defined (aka custom),
no idea yet what means the '+' one found in some places).

Also changed templates definitions to use OrderedDict's, gives better output.

Since global matrix might have some scale too, we have to normalize the matrix used for normals...

Many thanks to Jens Restemeier for pointing this issue.

This addresses the following issue: by default, when you export in a non-Blender orientation
(matching your target import app), your imported root objects have additional rotation,
since correction matrix is applied to object transform.

This patch addresses this by actually baking the correction matrix at data level, when possible
(currently only works for meshes).

Note this makes spaces/matrices handling rather complex, so this is considered an experimental
option currently, might break in some cases.

Work based on patch T39251 by Jens Restemeier, thanks.

Many thanks to Daniel Martinez-Normand for reporting the issue and making tests! :)

* Use 100% white transparency color when no transparency at all (seems to be needed by some importers).
* Always export some kind of Lambert shader, even when using e.g. Blender's toon one (better to get something, even inacurate, than nothing).

Patch by Jens Restemeier, many thanks!

Differential Revision: https://developer.blender.org/D405

Patch by Jens Restemeier, many thanks! :)

Differential Revision: https://developer.blender.org/D402

Patch by Jens Restemeier, with minor edits.

Differential Revision: https://developer.blender.org/D401

Issue pointed out by Jens Restemeier, thanks!

What to expect:
* Static export of empties, meshes, cameras and lamps, as well as materials and (image!) textures should work OK.
  There are a few advanced topics still TODO regarding meshes and mat/tex, though.
* Custom properties from objects/meshes/lamps/cameras/armatures/bones/materials/textures are exported too (only simple ones, ints/floats/strings).
* Armature export: this needs testing by people having *native* FBX aplications, linking between bones and meshes seems to work, but I have doubts about bones orientations.
* Animation: still a complete TODO.

Note that old FBX ASCII 6.1 exporter is still available (top dropdown in exporter's UI).

Many thanks to Campbell, which did the ground work of decyphering FBX binary format and wrote basic code to read/write it.

I can't find any docs on this but from checking the file these can be
safely ignored.

Import FBX: correct behavior for empty FBX files (no 'Objects' nor 'Connections'  top-level elements).

Fix a bug reported on IRC by mifth (a print was assuming org obj was a mesh...). Also cleaned up another debug print, we do not need those!

More FBX fixes regarding UV/textures, found while investigating a potential issue with mifth on IRC: handling of default empty texture (when there are none real texture to export) was rather fuzzy/inconsistent.

Note: not to be backported, not 100% sure this is now correct, and not a regression anyway.

This situation was simply not handled in existing code. Also removed last use of tessellation (my bad, should have checked this before), and enhanced/cleaned up a bit mat/tex handling.

Grr, another stupid mistake, we always need me.uv_textures, even if we do not actually export textures!

Stupid mistake, vcol was also affected…

* Export polygons instead of tessellated tris/quads.
* Export split vertex normals.
* Better performances (about 20% gain at least with big files), and use much less bytes when exporting UVs/VCol!

fbx import cycles materials - set image mapping from diffuse for other channels that have no mapping set.

Using a bit more flexible way to handle those values (range now from 10^-18 (20) to 10^2 (0) frames). Not sure we shouldn't rather get rid of such "magic" value and let user set frame threshold directly, though!

add check for reading ascii fbx files, was common annoyance that users are unaware that they try to import ascii files.

from Norbert Nopper (mcnopper), with some of my own edits.

- Improved light export
- Improved camera export
- Improved material export
- Improved mesh export. faces can now be either flat or smooth.