How to define mesh displacement as a function of the original mesh?

Mesh displacement is defined relative to the original, undeformed mesh. When the mesh displacement shall be a function of the coordinates of the original mesh, then this is not straightforward, as the original coordinates are not available to the user in CEL.

The original coordinates can be recomputed by using an expression like:

(x-Total Mesh Displacement x)

and this expression can be used to define the mesh displacement.

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