Manipulate Fence Contents

Use it!

Used to move, copy, rotate, mirror, scale, or stretch the fence contents, which are defined by the fence and (except for stretching) the Fence (Selection) Mode. See Specifying which elements are in the fence contents.

The method of manipulation is determined by the tool setting Operation. With the exception of Stretch, each Method works identically to a tool in the Manipulate tool box with the tool setting Use Fence on.

Operation	Identical to using this tool with Use Fence on
Copy	Copy
Move	Move
Scale	Scale
Rotate	Rotate
Mirror	Mirror

With Operation set to Stretch, Manipulate Fence Contents ignores the Fence (Selection) Mode and operates on elements as follows:

• A vertex of a line, line string, multi-line, or shape is moved if it is inside the fence. A vertex outside the fence is not moved.

• An endpoint of an arc is moved if it is inside the fence. An arc endpoint outside the fence is not moved.

• An ellipse, circle, or cell is moved if it is completely inside the fence.

Fence Stretch has always been a powerful tool when working on B-spline surfaces, because it allows you to move many poles (also known as control points) at once. With Fence Stretch built into the Rotate and Scale tools, this dramatically increases the power to bend and distort surfaces while keeping them smooth.

For general information about B-spline surfaces, see “3D Elements”.

You can use Fence Stretch to manipulate breaks (breaks in multi-lines are often used to represent windows or doorways when the multi-line itself is the wall). For instance, you can place your fence to include a window, and move the window along the wall. You may also change the size of the window by including only the start or end of the break in the fence. This means that in most cases, you do not have to drop the multi-line into its component elements to perform such manipulations.

For general information about multi-lines, see Using Multi-lines.

You cannot move the break off the multi-line segment that contains it. If you move the fence so the start or endpoint of a break would move off the segment, the break position will simply be projected to the nearest point on the segment. If you move a break off the end of the segment, it will simply be deleted.

If only one endpoint of the arc is in the fence, the arc is effectively rotated and scaled so that the point is moved to the new position. This means that arcs do not change their aspect ratio (for example, circular arcs do not become elliptical) or their sweep angle. Their new endpoint position remains consistent with how the fence was moved, instead of Fence Stretch simply scaling arcs in either x or y.

Tool Setting	Effect
Stretch Cells	If on, cells that overlap the fence are stretched. see footnote 28

To stretch segments of elements that overlap the fence

1. Select the Manipulate Fence Contents tool.


2. Set Operation to Stretch.
   The Stretch option ignores the Fence (Selection) Mode. The mode has no effect while the Stretch option is in use.


3. Enter a data point inside the fence to define the origin.


4. Enter a data point to reposition the fence and the affected vertices.

   Manipulate Fence Contents tool with Operation set to Stretch.

Key-in: FENCE ICON

The relative positions of cuts, breaks and partial deletions in multi-lines are maintained during stretch and move operations.

To constrain the movement of vertices to multiples of an angle, use AccuDraw in conjunction with the Stretch option for Manipulate Fence Contents.