A General Extrusion coupling operator () maps an expression defined on a source to an expression that can be evaluated on any destination geometry where the destination map expressions are valid. Compared to the linear extrusion, these operators define a more general, possibly nonlinear, relation between source and destination. Specifically, when the destination has more space dimensions than the source, the operator performs extrusion of values. The default Operator name is genext1.

In addition to the standard settings, the General Extrusion operator supports mapping from one product selection to another for models with extra dimension geometries. The product selection can be made for different geometries. If there is an Attached Dimension node available in the model component, you can select it from the Extra dimension attachment list. The source selection then becomes a product selection. To complete the extrusion mapping you also need to specify the coordinate expressions for the destination map in the extra dimension. If the Use source map check box in the Source section is selected, you also need to specify the coordinate expressions for the source map in the x-expression and y-expression fields, for example, which appears below that check box.

For the additional settings below the Extra dimension attachment list, see Using Extra Dimensions and especially the Selections in the Geometry section.

Also see the Destination Map for Extra Dimension and Source Map for Extra Dimension sections below.

Specify the general extrusion destination map by entering an expression in the x-expression, y-expression, and z-expression fields. This maps each point in the destination to a point in the intermediate mesh, where the argument of the extrusion operator is evaluated. A general extrusion operator can be evaluated at any point where the destination map expressions are defined.

This section only appears in connection with extra dimension geometries. In the Destination Map for Extra Dimension section you first specify the attached dimension for the destination in the Attachment list. It can be the same as the one for the source selection’s attached dimension. After selecting the attached dimension, you can fill in the correct number of coordinate expression in the table. It contains one row per attached extra dimension, and one coordinate expression per column. Leave the unused coordinate expressions empty (for example, only fill in the first column for a 1-dimensional extra dimensional geometry).

This section only appears in connection with extra dimension geometries. The Source Map for Extra Dimension section only includes the table for coordinate expressions because it uses the same attached dimension as the source selection. The table has the same row and column configuration as the table in the Destination Map for Extra Dimension section.