In this post I want to introduce the SPLINE command in AutoCAD. In other posts I have already introduced other important objects and commands in AutoCAD, such as e.g. AutoCAD XLINE, AutoCAD PLINE, AutoCAD POLYGON etc.

A spline is curved line that runs through or nearby a set of fitpoints.

Below I enter the SPLINE command in AutoCAD.

AutoCAD will ask me to specify the first point of the spline, which I can choose by clicking the respective area in the drawing. AutoCAD will then ask me for the next point, and the next point, and the next point … I can complete the SPLINE command by pressing ENTER.

Below is a complete spline which I have selected. As you can see its grip handlers are highlighted.

If I click the triangular shape two options will be prompted: “Fit” or “Control Vertices”. By default, fit is selected. This mean the spline will run through the fit points, resulting in a perfectly fitting line. I can manipulate the spline by adjusting the fit points.

If I instead select “Control Vertices” the line will run near control points. I can manipulate the spline by adjusting the control points.

This completes my tutorial on the SPLINE command in AutoCAD. In other posts I have e.g. demonstrated how you can use pyautocad in Python to develop Python scripts for AutoCAD.

Linnart Felkl

Data scientist focusing on simulation, optimization and modeling in R, SQL, VBA and Python