Use the Wrap tool to quickly wrap a PolyNURBS solid around a shape. You can create
multiple PolyNURBS cages, and bridge the face of one cage to another.
This tool only works on meshes (.stl files).
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On the ribbon, click the PolyNURBS tab.
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Click the Wrap icon.

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Click the existing shape to define the first section.
As you mouse over the shape, a preview of the first section is displayed. Red
lines indicate the true section through the geometry, while the black lines
indicate the actual face that will be created.
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Click a second time to define the next section.
As you mouse over the shape, a preview of the next section is displayed.
Moving the mouse along the section preview orients the cage face.
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Continue clicking along the existing shape to create additional sections.
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Click in the modeling window to complete the
cage.
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Right-click and mouse through the check mark to exit, or double-right-click.