AutoCAD 2026 Spline Command details with 3 examples

To make smooth curves that go through or close to a group of designated points, use AutoCAD’s Spline command. This versatile tool is frequently used to create curved designs that conventional lines or arcs cannot produce. Splines are frequently utilised in intricate surfaces and shapes, including in architectural draughting and automotive design.

Spline Command Overview:

1. Type of Spline: There are two types of splines in AutoCAD:
   • Fit: The spline passes through the given points.
   • Control: The spline is influenced by the control points but doesn’t necessarily pass through them.
2. Spline Options: You can create splines by specifying points (either fit or control), and you can also adjust how the spline behaves, such as whether it starts or ends at a specific point, or whether it uses a smooth or sharp transition.
3. Spline Tools:
   • SPLINEDIT: Edits existing splines.
   • PEDIT: Can be used to convert polylines to splines.

Steps to Use the Spline Command:

1. Activate the Spline Command: Type SPLINE or select the spline tool from the drawing tools.
2. Specify Spline Points: You can click to specify points in the drawing area.
3. Finish the Command: Press Enter to finish the spline creation, or type C to close the spline to the start point.

Examples of Using the Spline Command:

Example 1: Fit Spline through Points

1. Type SPLINE into the command line.
2. Click a series of points in the drawing to define the spline. The spline will pass through each point.
3. Press Enter to finish.

This example creates a smooth curve that exactly passes through the points you specify.

Example 2: Control Spline with Control Points

1. Type SPLINE into the command line.
2. Select the control points that will define the shape of the spline, but the spline will not necessarily pass through them.
3. Once the control points are placed, press Enter to finalize the spline.

In this case, the spline will be influenced by the control points but will not necessarily go through them.

Example 3: Edit an Existing Spline

1. Type SPLINEDIT into the command line to modify an existing spline.
2. Select the spline you want to edit.
3. Choose options such as adding points, adjusting the degree of the spline, or converting the spline to a polyline.

This example shows how you can modify and refine splines after they have been created.

For intricate, curved designs in any kind of project, AutoCAD’s Spline command is a flexible tool. If you would like further information or examples on a particular section of the command, please let me know!