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Creates a smooth curve that passes through or near a set of fit points, or that is defined by the vertices in a control frame.
- If you want to do that you can use the PEDIT command and select the spline. Choose a precision value and enter. Now you will end up with an object you can explode. Caution however: You'll end up with very small segments!
- But exploding it did not solve my problem. Using the join command turn my line into a spline and not a polyline. I was thinking why wont my lone explode!! So when I found this post it all made sense to me. My solution to exploding your spline is to use the pedit command to turn your spline into a polyline and now you will be able to explode the.
- Modifies the parameters of a spline or converts a spline-fit polyline to a spline. SPLINEDIT (Command) Products and versions covered. AutoCAD 2016, AutoCAD Architecture 2016, AutoCAD Civil 3D 2016, AutoCAD Electrical 2016, AutoCAD MEP 2016, AutoCAD Map 3D 2016, AutoCAD Mechanical 2016, AutoCAD P&ID 2016, AutoCAD Plant 3D 2016, AutoCAD.
- And if I try to explode this region manually using EXPLODE command in AutoCAD 2010 it gives message as 'Cannot explode REGION'. I am not getting why this is causing problem in 2010 only. It is working fine in other AutoCAD versions.
SplineConvert utility Convert arcs, circles, ellipses and spline curves to 2D polylines SplineConvert curve conversions. SplineConvert is a simple ARX utility for AutoCAD 2009, 2008, 2007, 2006, 2005, 2004 and 2002 which converts arcs, circles, ellipses and spline curves (plus derived AutoCAD objects) to 2D polylines with given tolerance.
SPLINE creates curves called nonuniform rational B-splines (NURBS), referred to as splines for simplicity.
Splines are defined either with fit points, or with control vertices. By default, fit points coincide with the spline, while control vertices define a control frame. Control frames provide a convenient method to shape the spline. Each method has its advantages.
To display or hide the control vertices and control frame, select or deselect the spline, or use CVSHOW and CVHIDE. However, for splines created with control vertices in AutoCAD LT, you can display the control frame only by selecting the spline.
The prompts differ, depending on whether you choose Fit or CV (control vertices) as the creation method (Method option).
First Point
Specifies the first point of the spline, either the first fit point or the first control vertex, depending on the current method.
Creates additional spline segments until you press Enter.
Closes the spline by defining the last point to be coincident with the first. By default, closed splines are periodic, maintaining curvature continuity (C2) along the entire loop.
Method
Controls whether the spline is created with fit points or with control vertices. Front license plate mounting bracket. (SPLMETHOD system variable)
Creates a degree 3 (cubic) B-spline by specifying fit points that the spline must pass through. When the tolerance value is greater than 0, the spline must be within the specified tolerance distance from each point.
Creates a spline by specifying control vertices. Use this method to create splines of degree 1 (linear), degree 2 (quadratic), degree 3 (cubic), and so on up to degree 10. Adjusting the shape of a spline by moving control vertices often provides better results than moving fit points.
Object
Converts 2D or 3D quadratic or cubic spline-fit polylines to equivalent splines. The original polyline is retained or discarded depending on the setting of the DELOBJ system variable.
Prompts for Splines with Fit Points
The following prompts are specific to the fit point method.
Specifies the knot parameterization, one of several computational methods that determines how the component curves between successive fit points within a spline are blended. (SPLKNOTS system variable)
- Chord. ( Chord-Length method) Spaces the knots connecting each component curve to be proportional to the distances between each associated pair of fit points. An example is the green curve in the illustration.
- Square root. (Centripetal method) Spaces the knots connecting each component curve to be proportional to the square root of the distance between each associated pair of fit points. This method usually produces “gentler” curves.
- Uniform. (Equidistant method). Spaces the knots of each component curve to be equal, regardless of the spacing of the fit points. This method often produces curves that overshoot the fit points.
Specifies a tangent condition on the starting point of the spline.
Specifies a tangent condition on the ending point of the spline.
Specifies the distance by which the spline is allowed to deviate from the specified fit points. A tolerance value of 0 requires the resulting spline to pass directly through the fit points. The tolerance value applies to all fit points except the starting and ending fit points, which always have a tolerance of 0.
Prompts for Splines with Control Vertices
The following prompt is specific to the control vertices (CV) method. (SPLMETHOD system variable)
Sets the polynomial degree of the resulting spline. Use this option to create splines of degree 1 (linear), degree 2 (quadratic), degree 3 (cubic), and so on up to degree 10.
Related Concepts
Related Reference
Issue:
When try to explode a block, the explode option if faded in the menubar or the following message appears on the command line 'Could not be exploded.'
Causes:
- Beginning with AutoCAD® 2006, the Allow Exploding option was added to the Block Definition dialog box. If this option is not selected when a block is created, instances of this block cannot be exploded.
- Corrupted user interface.
Solution:
To change the setting for an existing block so that it can be exploded:
- In the Block Editor, make sure nothing is selected.
- In the Properties palette(Ctrl+1), under Block, select the Allow Exploding option.
- On the Block Editor toolbar, click Save Block Definition.
- When you are finished using the Block Editor, click Close the Block Editor.
If above is not resolving the issue, try one of followings:
- Use the icon in the modify tab.
- Type the shortcut command X(explode) from the command line and enter.
- Explode blocks while inserting. (Tick the check box)
Classic design for Insert dialog.
New design for Insert dialog from AutoCAD 2020.
New design for Insert dialog from AutoCAD 2020.