Offset surface up to a datum point?

[David_M]

Does anyone know of a reasonably quick way to offset a complex surface up to a point rather than by a value? Naturally only one point on the surface would be at the specified point after the operation.

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[GrahameWard]

You might have to use a relation.

[dgschaefer]

Create an analysis feature to measure and capture the distance from the point to the surface then set the offset to be equal to the measured distance.

[David_M]

Thanks for both your replies. The I need to offset by a negative value and the offset feature does not allow for linking to parameters with negative values.

[GrahameWard]

You can maybe use the Absolute Value relation. I forget the syntax.