Issue overview

If OS:Space's "Floor Area" is not set in the OSM file, the floorArea method uses this->surfaces() to get the sum of surface gross areas. This can lead to a non deterministic result.

Current Behavior

It's possible for space.floorArea to return slightly different values.

Expected Behavior

The value should be the same every time the method is called.

Steps to Reproduce

Possible Solution

Is there a way we can step through surfaces in a deterministic order?

Details

Environment

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• Platform (Operating system, version):
• Version of OpenStudio (if using an intermediate build, include SHA):

Context