Problems with item "RotationCenter" in item "Extrusion" in the property "CustomShapeGeometry"

[Regina Henschel]

Hi Miklos,

Miklos Vajna schrieb am 22.11.2021 um 08:21:
> 
> Yes, if our doc model wants to work in fractions and MSO works in EMUs,
> then doing this mapping in the MSO import/export filters sounds good to
> me.

The situation is different. All specifications and our own description 
in API use "fraction of shape size", but our internal property 
"RotationCenter" uses Hmm.

I have two ways to fix it:
A
Change our internal property to use "fraction of shape size".
B
Keep Hmm for our internal property and change description in API and 
change all import/export filters.

So which way to go, A or B?

In case you wonder about OOXML: OOXML has no corresponding property. But 
we likely need to use "RotationCenter" when implementing import filter 
for groups with <scene3d> child element, because our own group has no 
properties and therefor the <scene3d> properties need to be converted to 
custom shape extrusion properties on the child elements of the group.

Kind regards,
Regina