#### 2.1.14.3. Snap-to Geometry

The Snap-to Geometry feature can alter an extruded Solid Model to align with an imported CAD geometry. The layered Solid Model is locally stretched or compressed so that its selected faces coincide with the CAD geometry. Multiple Snap-to Geometries can be assigned to one Solid Model. The adaptation occurs at the first intersection that is found.

The feature is only applied to the selected Oriented Selection Set and its selected face (top or bottom). Which face is top or bottom is defined by the normal orientation of the Oriented Selection Set. The height of all the elements through the thickness is altered to an even distribution.

In the following example, the first picture shows the extrusion without any Snap-to Geometry operation. The lay-up is defined from two Oriented Selection Sets which point in opposite directions. In the second figure, the first Modeling Ply (oriented to the top) is defined to be extruded to a CAD Geometry. Only the nodes which meet the surface are extruded until the surface. The other nodes are extruded normally. The second Modeling Ply is extruded to another CAD Geometry in the last figure. For both cases, the orientation of the Snap-to Geometry operation must be top as the Oriented Selection Sets both point outward.

Figure : Extrusion without Snap Operation

Figure : Extrusion with Snap to Geometry at the Top (Shell Geometry also Displayed)

Figure : Extrusion with Snap to Geometry at the Top and Bottom (Shell Geometry also Displayed)

Caution: The Snap to Geometry operation occurs after the Extrusion Guide operations. It is possible that the nodes moved during the Extrusion Guide operations are translated again, and do not match with the previous Extrusion Guide definition.

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