SPLINE Command — GstarCAD 2027

SPLINE Command

GstarCAD 2027 · Command Reference

Commands > S Command > SPLINE

Function Description:

This command is used to create smooth curves through or near a group of fit points.
The SPLINE is called non-uniform rational B-spline (NURBS), for simplicity, called splines. It is defined by fit points. By default, the fit points are coinciding with spline.

Command Access:

Icon:
Menu: Draw > Spline
Ribbon: Home > Draw > Spline
Toolbar: Draw > Spline
Command: SPLINE
Alias: SPL

Command Prompts:

Specify first point or [Object]:
Specify next point:
Specify next point or [Close/Fit tolerance] \<start tangent>:

First point

Specifies the first point of a spline.

Object

Converts 2D or 3D polylines that fitted by quadric splines or cubic splines to equivalent splines. Users can save or discard the original polyline by setting the DELOBJ system variable.

Next point

Prompts to create other splines, pressing Enter to end the command prompts.

Close

Closes the spline by defining the last point coincides with the first point. By default, the closed spline is periodic and keeps curvature continuously along the entire ring.

Fit tolerance

Specifies the offset of fit points of a spline. If the fit tolerance is 0, the created spline passes through all fit points. The fit tolerance is applied on all fit points (except the start point and the endpoint).

Start tangent

Specifies the tangent condition at the starting point of a spline.

End tangent

Specifies the tangent condition at the ending point of a spline.

Related References：

• Commands about Creating Procedural Surfaces
• Commands about Curved Objects

Related Tasks：

• To Work With Circles
• To Work With Ellipses
• To Work With Arcs
• To Draw a Helix
• To Work With Splines

Other versions with matching text

2023 · 2024 · 2025 · 2026

Article ID: 4082
Created: September 26, 2026
Last Updated: September 25, 2026
Author: kbadmin

Online URL: https://kb.gstarcad.com.my/article/spline-command-gstarcad-2027-4082.html