Spline
Menu: Draw – 
Spline
Toolbar: Draw –
Command line: SPL, SPLINE
A spline is a smooth curve passing through a given set of points. Example of spline usage: line breaks of objects.
Spline can be created by two methods:
Fit points
When creating splines using fit points, the resulting curve goes through the specified points and depends on intervals between mathematic knots of curve.
Control vertices
When creating splines using control vertices, temporary lines are displayed between the specified points, they form control polygon that defines the spline form.
Command options:Method Selects the method of creation [Fit/Control]
Object Converts a polyline, smoothed by the Spline and Smooth commands, to an equivalent spline.
Close Closes a spline.
Fit tolerance The maximum distance from a spline curve to any points defining it.
Undo Successively reverses the specified points. It is impossible to undo the specified start point.
Creating Splines by Fit Points Method
Ribbon: Main – Draw > 
Fit points
Menu: Draw – Spline > Fit points
Toolbar: Draw – Fit points
Command line: SPL, SPLINE – Method > Fit
Command prompts:
Current settings:
Method=Fit
Specify first point or [Method/Object]: Specify a start point 1.
Specify second point: Specify second point 2.
Specify next point [Fit tolerance/Undo] Specify 3, 4, 5 etc. points.
Specify next point or [Close/Fit tolerance/Undo] Press ENTER to finish specifying points.
Specify start tangent: Specify a tangent 6 for the start spline point.
Specify end tangent: Specify a tangent 7 for the end spline point.
Creating Splines by Control Vertices Method
Ribbon: Main – Draw > 
Control vertices
Manu: Draw – Spline > Control vertices
Toolbar: Draw – Control vertices
Command line: SPL, SPLINE – Method > Control
Command prompts:
Current settings: Method=Cv
Specify first point or [Method/Object]: Specify the spline start point.
Specify second point: Specify the second point.
Specify next point or [Undo]: Specify the next point.
Specify next point or [Close/Undo]: Specify all next points. Press ENTER to close the command.
Converting Objects to Spline
Lines, polylines, spline-smoothed polylines, arcs, circles, elliptical arcs can be transformed into a spline.
Specify first point or [Method/Object]: Object Select the Object option.
Select objects to convert to splines or [?]: Select objects.
Press ENTER to complete the command.Info: NanoCAD is an easy-to-use, low cost, and yet professional, CAD program for Windows, that provides an outstanding user experience by providing enhanced performance, full capability, a classic interface and native.dwg format support. nanoCAD has been built to deliver design and project documentation for all engineering purposes. nanoCAD includes a full suite of basic and advanced CAD tools for 2D/3D drawing and creating industry-standard DWG-compatible CAD files. Our software ensures creative, collaborative and customizable features to boost your efficiency, and includes a number of API’s, allowing anything from routine task automation to complex CAD software development. You may try nanoCad for free, using the links below, and buy later, in case you like it.
Feedback
Post your comment on this topic.