The engine supports vertex animation. You can use shape keys or use a rigging/IK setup. Just know that your animation will be converted to keyframes, i.e : Your armature won't be retained in the engine.
Mixing LNA tracks
In blender, animation exist as strips on LNA tracks. You can see them in the 'NLA editor'.
If an animation has not been converted to an NLA strip when exporting, the script will do that for you.
In the example above, you can see 'KeyAction.001' is overlapping with 'KeyAction', which itself is overlapping with 'KeyAction.002'.
The same is true of 'KeyAction.003' and 'KeyAction.004'.
The default behaviour will be to export each strip separately. This would result in 5 animations as there are 5 strips on the various NLA tracks.
Enabling the export option 'Mix overlapping LNA tracks' in this case will result in 2 animations ;
- the first one will be the result of mixing 'KeyAction.001', 'KeyAction' and 'KeyAction.002'.
- the second one will be the result of mixing ''KeyAction.003' and 'KeyAction.004'
Mixing Example
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