nanoCAD Platform Help

Spline

CAD drafting Spline 0   Menu: Draw – CAD software Spline 1 Spline

CAD drawing Spline 2   Toolbar: Draw – CAD drafting Spline 3

CAD software Spline 4 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

CAD drawing Spline 5

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

CAD drafting Spline 6

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

CAD software Spline 7    Ribbon: Main – Draw > CAD drawing Spline 8 Fit points

CAD drafting Spline 9    Menu: Draw – Spline > CAD software Spline 10 Fit points

CAD drawing Spline 11    Toolbar: Draw – CAD drafting Spline 12 Fit points

CAD software Spline 13 Command line: SPL, SPLINE – Method > Fit

CAD drawing Spline 14

 

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] <start tangent>

Specify 3, 4, 5 etc. points.

Specify next point or [Close/Fit tolerance/Undo] <start tangent>

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

CAD drafting Spline 15    Ribbon: Main – Draw > CAD software Spline 16 Control vertices

CAD drawing Spline 17    Manu: Draw – Spline > CAD drafting Spline 18 Control vertices

CAD software Spline 19    Toolbar: Draw – CAD drawing Spline 20 Control vertices

CAD drafting Spline 21 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.

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