What is a modifier technically doing to make them Non-Destructive?

Support Modeling
1

Hello Fellow Blenders,

I ask the question because when I look in at the outliner after adding a modifier to an object I see:
wrench and under the wrench I see the name of the modifier.

I do not believe modifiers are data-blocks. and if that is true, what is being attached to the object?
I guess it could be the children of the wrench could be technically called "automatic operations "?

any hint on what Modifier are and how they can be Non-Destructive would great help.

We all learn by sharing what we know
Smartdog

2

Its leaving the original data untouched and calculates his data operation on the fly passing the modified data instead of the original data.

3

Something like that what you already said. Usually there is some data which descriped the geometry ( → objects). Modifiers are just coded internal procedures to changes those data in a specific way ( → tools/wrench) . So they are nothing else as additional data.

4

@rigoletto @Okidoki Thank you for responding to my question about modifiers.
Sorry to take to so long to thank you.

Happy Blendering