SPLINEDIT Command

Edits a spline object or spline-fit polyline

	Modify II toolbar:
	Modify menu: Object > Spline
	Command line: splinedit

Select spline: Use an object selection method
Fit Data / Close / Move Vertex / Refine / rEverse / Undo / eXit <X>: Enter an option or press ENTER

When you select a spline object or spline-fit polyline, grips appear at the control points.

If the selected spline is closed, the Close option changes to Open. If the selected spline has no fit data, the Fit Data option is not available. Fit data consists of all fit points, the fit tolerance, and tangents associated with splines created with the SPLINE command.

A spline can lose its fit data if you

• Use the Purge option while editing fit data
• Refine the spline by elevating the order, adding a control point, or changing the weight of a control point
• Change the fit tolerance
• Move a control point
• Trim, break, stretch, or lengthen the spline

Edits fit data splines using the following options:

Add / Close / Delete / Move / Purge / Tangents / toLerance / eXit <X>: Enter an option or press ENTER

Add

Adds fit points to a spline.

Select point: Select a fit point
Enter new point: Specify a point
Enter new point: Specify a point or press ENTER

When you select a point, AutoCAD LT highlights it and the next point and interprets the new point to go between the highlighted points. Use the Undo option to remove the last point added.

Selecting the last point on an open spline highlights only that point, and AutoCAD LT adds the new point after the last. If you select the first point on an open spline, you have the option of placing the new point before or after the first point.

After / <Before> <Enter new point>: Specify a point, enter an option, or press ENTER
Enter new point: Specify a point or press ENTER

AutoCAD LT adds the point and refits the spline through the new set of points.

Close

Closes an open spline and makes it tangent continuous (smooth) at its endpoints.

If the start point and endpoint of the spline are the same, the close option makes it tangent continuous at both points

Open

Opens a closed spline. If the start point and endpoint of the spline were the same before the Close option was used to make it tangent continuous at both points, the Open option returns the spline to its original state. The start point and endpoint remain the same but lose their tangent continuity (smoothness).If the spline was open before the Close option was used to make it tangent continuous where the start point and endpoint meet, the open option returns the spline to its original open state and removes tangent continuity.

Delete

Removes fit points from a spline and refits the spline through the remaining points.

Select point: Select a fit point or press ENTER

Move

Moves a fit point to a new location.

Next / Previous / Select Point / eXit / Enter new location: <N>: Specify a point, enter an option, or press ENTER

• Select Point. Selects from the set of fit points.
• Next. Changes the selected point to be the next point.
• Previous. Changes the point to the previous point.
• Enter New Location. Moves the selected point when you specify a point.
• Exit. Returns you to the main prompt of the SPLINEDIT command.

Purge

Removes a spline's fit data from the drawing database. After purging the spline's fit data, AutoCAD LT displays the main prompt without the Fit Data option.

Tangents

Edits the start and end tangents of a spline.

System Default/<Enter start tangent>: Specify a point, enter an option, or press ENTER
System Default/<Enter end tangent>: Specify a point, enter an option, or press ENTER

If the spline is closed, the Enter Start Tangent option changes to Enter Tangent. The System Default option calculates the default tangents at the ends. You can specify a point or use Tan or Perp object snap mode to make the spline tangential or perpendicular to existing objects.

Tolerance

Refits the spline to the existing points with new tolerance values.

Enter fit tolerance <current>: Enter a value or press ENTER

Exit

Returns to the main prompt of the SPLINEDIT command.

Close (SPLINEDIT)

Closes an open spline and makes it tangent continuous (smooth) at its endpoints. If the start point and endpoint of the spline are the same, the Close option makes it tangent continuous at both points.

Open

Opens a closed spline. If the start point and endpoint of the spline were the same before the Close option was used to make it tangent continuous at both points, the Open option returns the spline to its original state. The start point and endpoint remain the same but lose their tangent continuity (smoothness).

If the spline was open before the Close option was used to make it tangent continuous where the start point and endpoint meet, the Open option returns the spline to its original open state and removes tangent continuity.

Move Vertex (SPLINEDIT)

Relocates the control vertices of a spline and purges the fit points.

Next / Previous / Select Point / eXit / Enter new location <N>: Specify a point, enter an option, or press ENTER

Next

Changes the selected point to be the next point. The point marker does not wrap around from the end to the start of the spline, even if the spline is closed.

Previous

Changes the selected point to be the previous point. The point marker does not wrap around from the end to the start of the spline, even if the spline is closed.

Select Point

Selects a point from the set of control points.

Exit

Ends the SPLINEDIT command.

Enter New Location

Moves the selected point to a new location when you locate a point or enter a coordinate.

After you enter a new location for the selected point, AutoCAD LT recalculates and displays the spline with a new set of control points.

Refine (SPLINEDIT)

Fine-tunes a spline definition.

Add control point / Elevate Order / Weight / eXit <X>: Enter an option or press ENTER

Add Control Point

Increases the number of points that control a portion of a spline.

Select a point on the spline: Select a point or press ENTER

AutoCAD LT adds a new control point close to the location you select between the two control points.

Elevate Order

Increases the order of the spline.

Enter new order <current>: Enter an integer or press ENTER

Entering a value greater than the current value increases the number of control points uniformly across the spline for more localized control. The maximum value for order is 26.

Weight

Changes the weight at various spline control points. A larger value will pull the spline closer to the control point.

Next / Previous / Select Point / eXit / <Enter new weight> <current> <N>: Enter an integer, enter an option, or press ENTER

• Next. Changes the selected point to be the next point. The point marker does not wrap around from the end to the start of the spline, even if the spline is closed.
• Previous. Changes the selected point to be the previous point. The point marker does not wrap around from the end to the start of the spline, even if the spline is closed.
• Select Point. Selects a point from the set of control points.
• Exit. Returns to the main Refine prompt.
• Enter New Weight. Recalculates the spline based on the new weight value at the selected control point. The larger the value, the more the spline is pulled toward the control point.

Exit

Returns to the main prompt.

Reverse

Reverses the direction of a spline. This option is intended primarily for applications that are added on to AutoCAD LT.

Undo

Cancels the last editing action.

Exit

Ends the command and returns to the Command prompt.

Related Commands: PEDIT edits spline-fit polylines. SPLINE creates a quadratic or cubic spline (NURBS) curve.