Modifies the properties of a spline; converses a spline to a polyline.
Note: It is easier to edit the spline and its grips when Snap is turned off.
Accessing the Command
command bar: splinedit
transparent: 'splinedit
menu bar: Menu| command
toolbar: Modify |
: SplinEdit
Prompts you in the command bar:
Select spline: (Select a spline entity)
Edit spline [Close/Join/Fit data/Edit vertex/convert to Polyline/Reverse/Undo/eXit] <eXit>: (Select an option)
Edit spline [Close/Join/Fit data/Edit vertex/convert to Polyline/Reverse/Undo/eXit] <eXit>: (Select another option, or else press Enter to end the command)
Command Options
Option |
Description |
Select spline to edit |
Selects the spline to which the editing operations should apply: pick a single spline. The program shows the spline's fit points (green squares) and places a triangle at the start of the spline: |
Close or Open |
Depending on whether the selected spline is open or closed, one of the options is available:
|
Join |
Joins the spline with an open 2D entity that shares an endpoint with the spline (coincident endpoints); you can join lines, polylines, arcs, elliptical arcs, and other splines. Prompts you:
The entities joined to the spline take on the properties of the spline, such as its color and linetype. |
Fit Data |
Edits fit point data using several options; fit points determine the curvature of the spline. Prompts you: Edit fit data [Add/Close/Delete/Kink/Move/Purge/Tangents/toLerance/eXit] <eXit> - (choose an option:) Add - adds fit point between two existing ones; prompts you:
Close/Open - closes an open spline by connecting the start and end points, or else opens a closed spline by removing the segment between the first and last points when the spline was originally created. Delete : Removes fit points; prompts you:
Kink - adds a knot and fit point at the specified location on the spline, which does not maintain tangent or curvature continuity at that point; prompts you:
Move - moves a fit point; prompts you: Enter new location or [Next/Previous/Select point/eXit] <N> - (the program automatically selects the first fit point, the one marked by the triangle; enter an option:)
Purge - replaces the fit data from the spline with control vertices: Tangents - changes the starting and ending tangents of an open spline; prompts you:
For closed splines you are prompted to define the tangent at the point of closure. Tolerance - refits the selected spline to the existing fit points using a new tolerance value; prompts you: Enter fit tolerance <0.000000> - (type a value.) Exit - accepts the changes and returns to the previous prompt. |
Edit Vertex |
Edits control frame data using several options; prompts you: Edit vertex [Add/Delete/Elevate order/Move/Weight/eXit] <eXit> - (choose an option.) Add - adds a new control vertex at the point you specify; prompts you:
Delete - removes control vertex; prompts you:
Elevate Order - increases the polynomial order (degree plus one) of the spline to increase the number of control vertices across the spline; the maximum value is 26. Prompts you: Enter new order <xx> - (type an integer.) Move - relocates control vertices one by one; prompts you:
Weight - changes the weight of a specified control vertex and then recalculates the spline based on the new weight value; larger weights pull the spline closer to the control vertex. In the figure below, the red control vertex has a weight of 1: And here the red control vertex has a weight of 6: Prompts you:
Exit - accepts the changes and returns to the previous prompt. |
Convert to Polyline |
Converts the spline to a polyline. The precision determines how closely the resulting polyline matches the spline: values between 0 and 99 are accepted, with higher values creating more polyline segments. Prompts you: Specify a precision <10> - (enter an integer.) The PLINECONVERTMODE variable specifies the kind of polyline to convert to:
|
Reverse |
Reverses the direction of the spline; the triangle icon appears on what was formerly the spline's end point. |
Undo |
Undoes the previous modification. |
Exit |
Concludes the editing of the spline. |
Related Commands
Join - joins lines, LW polylines, 2D polylines, 3D polylines, circular arcs, elliptical arcs, splines and helixes at their common endpoints.
PEdit - edits polylines, 3D polylines, and 3D meshes.
Spline - draws open and closed splines.