How is Navisworks tracking clashes?

[digitiselic01]

Sometimes, the GUID or shape of an object changes between v1 and v2 of the model, but Navisworks still recognizes the clash as existing. I'm wondering — what does Navisworks use to track clashes across model updates?

Is it relying on:

• The object name

• Geometric data

• Spatial coordinates

• The object's position within the model hierarchy

• Or something else?

Additionally, what is the best way to ensure that the clash groups I’ve created are being correctly maintained and updated when I append a new model version?

Thank you,

[brett_parkerLUEP7]

Hello,

Thank you for posting on the forums. We cannot give exact details but Navisworks has an algorithm that works out how likely 2 objects are to be the same and that is how it knows a clash result is the same. 

Sorry I cannot give you more details but this is Navisworks' "secret sauce".

Regards