Add/Edit PolyNURBS

Editing PolyNURBS

Edit points, edges, and faces to modify the shape of a PolyNURBS object.

The shape of a PolyNURBS object can be modified by manipulating the shape of its cage. To enter editing mode, select the main PolyNURBS tool or double-click a PolyNURBS object.

Drag the cage's faces, edges, and vertices directly or use the graphic manipulators to modify the cage.

Points can be dragged along the edges they connect and snapped to existing points in the model.
Edges can be dragged along the faces they connect or along the edge itself. Holding the Shift key while clicking creates an edge loop.
Faces can be dragged normal to their initial position. Holding the Ctrl key while dragging a face creates a cage face and automatically activates push/pull mode. Holding the Shift key while dragging creates a face inset.

When editing PolyNURBS, faces and edges can also be dragged and merged to other PolyNURBS objects.

Edit a Point

Move or project a point to modify the shape of the PolyNURBS object.

To enter editing mode, double-click a PolyNURBS object.

Choose from the following options:

To	Do this
Move a point freely	Drag the point.
Move a selected point along an edge	When you select a point, three arrows appear. Drag an arrow to move the point along the edge.
Make selected points collinear	Click .
Project a selected point to the x-, y-, or z-axis	Click .

Edit an Edge

Move, lengthen, or shorten an edge to modify the shape of a PolyNURBS object.

To enter editing mode, double-click a PolyNURBS object.

Choose from the following options:

To	Do this	Note
Move an edge freely	Drag the edge.
Move a selected edge within a plane	When you select an edge, arrows appear at the center of the edge. Drag an arrow at the center to move the edge within the corresponding plane.
Lengthen or shorten a selected edge	When you select an edge, arrows appear at both ends of the edge. Drag an arrow at one of the ends to lengthen or shorten the edge.	Hold down Ctrl while dragging to lengthen or shorten both ends of the edge symmetrically.

Edit a Face

Push, pull, scale, rotate, or project a face to modify the geometry of a PolyNURBS.

To enter editing mode, double-click a PolyNURBS object.

Choose from the following options:

To	Do this	Note
Push/pull a face (a precise distance)	Drag the face.	To push/pull the face a precise distance, enter a distance in the microdialog.
Push/pull a selected face	When you select a face, an arrow appears at the center of the face. Drag the arrow at the center to push/pull the face.	Hold down Ctrl while dragging to create a new cage face.
Scale a selected face	When you select a face, planes appear at the corners of the face. Drag a plane at the corner to scale the face.	Hold down Ctrl while dragging to scale the face about its center. Hold down Ctrl+Shift while dragging to scale the face about its center while maintaining the original aspect ratio.
Rotate a selected face about its center	When you select a face, a curved arrow appears when you hover over a corner or an edge. Figure 1. Hover over a corner Figure 2. Hover over an edge Drag the curved arrow to rotate the face about its center.
Move an edge along the plane of a selected face	When you select a face, a straight arrow appears when you hover over an edge. Drag the straight arrow to move the edge along the plane of the face.	Hold down Ctrl while dragging to lengthen or shorten the original face symmetrically.
Project a selected face onto the dotted plane	Click .
Project a selected face to the x-, y-, or z-axis	Click .

Microdialog Options

Option	Description	Note
	Open the Move tool to move the selected points, edges, or faces.
	Make the selected points collinear.	Only available when you select multiple points.
	Flatten to face.	Clicking this icon will project the selected face onto the dotted plane. If two edges are selected, clicking this icon will set the edges parallel.
	Project the selected point or face to the x-, y-, or z-axis.	Only available for points and faces.
	Patch across free edges.	Only available when you have selected a connected set of PolyNURBS edges. Double-click an edge to quickly select a connected set of edges.

Tip: You can change the transparency of the underlying shape (STL or optimization result) using the slider which appears next to the view controls.

View Controls

The following additional view controls are available when editing PolyNURBS.

You can change the transparency of the underlying shape (STL or optimization result) using the slider which appears next to the view controls.
Click to toggle between showing PolyNURBS cages or blocks.

Keyboard Shortcuts & Mouse Controls

To	Do this	Notes
Select all adjacent faces within a 30 degree tolerance Select an edge loop	Double-click
Temporarily disable snaps (PolyNURBS tool) Change the section preview so that it is aligned to the underlying shape rather than parallel to the face (Wrap tool)	Alt
Change the transparency of the underlying shape (STL or optimization result)	Alt+middle mouse scroll
Add to or remove from the selection Create a new face when dragging a face Symmetric scaling of edges or faces when dragging certain graphic manipulators	Ctrl
Uniform scaling of faces when dragging face plane manipulators	Ctrl+Shift
Delete selected points, edges, or faces Delete edge loop	Delete	When you select points or edges on a solid PolyNURBS, the points or edges are deleted and a solid is maintained. When you select a face on a solid PolyNURBS, the face is deleted and a surface is created.
Delete selected points, edges, or faces	Delete+Shift	When you select points or edges on a solid PolyNURBS, the points or edges are deleted and a solid is maintained. When you select a face on a solid PolyNURBS, the face is deleted and a surface is created.
Hide polyNURBS, while keeping control cage visible	H
Create an edge loop when selecting an edge Create an inset when selecting a face	Shift
Exit tool	Right-click and mouse through the check mark to exit, or double-right-click.