"Error calculating normalized scale of scene" in animated model

I have an animated 3D model where the animation is a rotation transform of the whole model around its center. When loading the model, I got an error saying "Error calculating normalized scale of scene".

When computing the normalized scale of the model, if it has animations, it does it based on the animated positions and ignores the model's geometry:

https://github.com/openframeworks/openFrameworks/blob/6b3b320fd2e8f21cde059df7a31dd4a9cf830e1e/addons/ofxAssimpModelLoader/src/ofxAssimpModelLoader.cpp#L630-L657

This can produce many unexpected results depending on the animations.

What could be a better option to fix this?

• Use the geometry only to compute the scale
• Play the animations and compute the scale based on the absolute min and max through all the transformed positions of the geometry

Start in addons/ofxAssimpModelLoader/src/ofxAssimpModelLoader.cpp at lines 630-657 and inspect how normalized scale is calculated for animated scenes. Reproduce the issue with an animated model using a rotation transform, then evaluate the geometry-only and transformed-position approaches described in the report; done means normalized scale is calculated without the reported error and handles this animation case.