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====== FBX Importing ======

Importing FBX files in Unity with the correct scale, rotation, and axis is fraught.

===== Unit Scaling =====

FBX files seems to be in cm by default, but can support other units. Other unit scales are achieved in FBX by by setting ''GlobalSettings->Properties70->UnitScaleFactor'' property in the file. For example, a 1 meter cube in 'meters' should be stored in an fbx file like:
<code>
GlobalSettings:
  - Properties70:
      - UnitScaleFactor = (100.0)   # The 'unit' is 100 * 1cm 
CubeObject:
    - Lcl Scaling = (1,1,1)
</code>

This file will show up in Unity's importer as '1m (File)'. 

{{:unity_uhvnfc5tw5.png}}

==== Blender ====

In order to achieve the above scaling (scale of 1 on objects, UnitScaleFactor=100), in the export settings set one of the following for ''Transform->Apply Scaling'':
  * FBX Units Scale
  * FBX All

 
===== Rotation =====

In the FBX file format, global axis alignment is stored in the global properties:
<code yaml>
Name: P - String("UpAxis")  String("int")  String("Integer")  String("")  I32(2)  
Name: P - String("UpAxisSign")  String("int")  String("Integer")  String("")  I32(1)  
Name: P - String("FrontAxis")  String("int")  String("Integer")  String("")  I32(1)  
Name: P - String("FrontAxisSign")  String("int")  String("Integer")  String("")  I32(1)  
Name: P - String("CoordAxis")  String("int")  String("Integer")  String("")  I32(0)  
Name: P - String("CoordAxisSign")  String("int")  String("Integer")  String("")  I32(-1)  
Name: P - String("OriginalUpAxis")  String("int")  String("Integer")  String("")  I32(-1)  
Name: P - String("OriginalUpAxisSign")  String("int")  String("Integer")  String("")  I32(1)  
</code>
==== Blender ====
{{:blender_6pdtp5vutg.png}}

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