#### 2.1.6.2. 3-D Look-up Table

A 3-D Look-up Table can be used in:

- the definition of an Oriented Selection Set Reference Direction.

- the definition of the draping angle.

- the definition of the ply thickness.

Figure : Look-up Table Properties

The values in the Look-up Table are inter- or extrapolated to the model elements position. The interpolation uses the Shepard's method (3-D inverse distance weighted interpolation). The Interpolation tab allows to enter two parameters. By default, ACP evaluates a reasonable search radius and the number of interpolation points is 1.

Figure : Look-up Table Interpolation Parameters

- Search Radius: Only the element centers which are included in this radius are used in the interpolation.

- Min. Number of Interpolation Points: If there are of no element centers (or not enough if > 1) in the radius, the Search Radius is increased until the pinball includes at least the minimum number of interpolation points (element centers) defined in this value.

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