Draftsight Spline to Polyline? | TutoCAD

Understanding the Conversion from Spline to Polyline in Draftsight

When working in Draftsight, you may need to convert a spline—a type of smooth curve—into a polyline, which is a series of connected line segments. This task is commonly required to achieve better control over object editing and manipulation within your designs.

What is a Spline?

A spline is a mathematical representation of a curve that can smoothly pass through specific points, giving users the ability to create complex shapes. It consists of multiple control points that define its shape. On the other hand, a polyline is a collection of line segments or arcs joined together, allowing for both straight and curvy designs while maintaining specific geometric properties.

Commands for Converting a Spline to a Polyline

Step-by-Step Method Using the SPLINEDIT Command

1. Initiate SPLINEDIT: Type SPLINEDIT in the command line to start the command.
2. Select the Spline: Click on the spline you wish to convert to a polyline. If you had already selected it, you can directly proceed to the next step.
3. Choose Conversion Option: When prompted, type P and then hit Enter. This indicates that you want to convert the spline to a polyline.
4. Specify Precision: You may be asked to enter a precision value. This defines how closely the polyline will match the original spline shape. You can specify a number for precision or simply press Enter to accept the default value.

Alternative Method Using the PE Command

1. Open Command Line: Type PE in the command line and press Enter.
2. Select the Spline: Click on the spline you want to convert.
3. Confirm Conversion: Press Enter again to finalize the conversion into a polyline.

Additional Tips for Working with Polylines in Draftsight

Editing Polylines

Polylines can be easily edited after conversion. You can utilize commands such as:

• Edit Polyline: Select this option from the Modify panel to access various editing features.
• Join Command: Use this to connect multiple lines or arcs into one continuous polyline.
• Width Adjustment: Specify a uniform width for the entire polyline for consistent appearance.

Creating New Polylines

To create a new polyline from scratch:

1. Access Polyline Tool: Navigate to Draw > PolyLine or simply type POLYLINE in the command line.
2. Define Start Point: Click in the drawing area to set the starting point of your polyline.
3. Add Segments: Specify points to create segments, alternating between straight lines and arcs as necessary.
4. Finalize Creation: Press Enter to complete the polyline or C to close it into a loop.

Frequently Asked Questions

1. Can I convert multiple splines to polylines at once?
No, the commands for converting splines to polylines operate on one spline at a time. However, you can convert multiple splines sequentially using the method outlined above.

2. What happens to the original spline after conversion?
Once a spline is converted to a polyline, the original spline remains in the drawing unless you choose to delete it. You have the option to keep both or discard the spline.

3. Are there any limitations when converting splines to polylines?
The main limitation is that the converted polyline may not perfectly replicate the curvature of the spline, depending on the precision setting applied during the conversion process. The higher the precision, the closer the polyline will match the original spline.