Short description

🧩 Spline2Poly converts AutoCAD SPLINE entities to polylines using SPLINEDIT Convert to Polyline with precision 1.
🎛️ A dynamically generated DCL lets the user choose manual spline selection or conversion of all splines in the entire drawing.
💾 Selection mode and dialog position are remembered in the AutoCAD configuration and during the current session.

Command:

Main command: Spline2Poly
Conversion engine: SPLINEDIT Convert to Polyline precision 1

Description:

🎛️ The DCL is written to a unique temporary file on each run.
🖱️ Manual mode asks the user to select SPLINE entities.
🌐 All mode gathers all SPLINE entities in the complete drawing.
🔒 Splines on locked or frozen layers are skipped.
🗂️ The routine switches to the entity layout or model tab when required before calling SPLINEDIT.
⚙️ SPLINEDIT converts the source using polyline precision 1.
📊 The command tracks Converted Skipped and Failed totals.
↩️ Processing is wrapped in an AutoCAD undo group and the original CTAB and CMDECHO values are restored.

Helper function: (if any)

Spline2Poly:ConvertOneSpline performs SPLINEDIT conversion and verification.
Spline2Poly:LayerLockedOrFrozenP validates the source layer.
Spline2Poly:SetLayoutIfNeeded switches to the entity layout before conversion.

Functionalities:

✅ Manual selection mode – converts only selected SPLINE entities.
✅ All drawing mode – converts every SPLINE found in the drawing.
✅ Dynamic DCL – creates a unique temporary dialog file.
✅ Locked layer protection – skips splines on locked layers.
✅ Frozen layer protection – skips splines on frozen layers.
✅ Layout switching – processes entities in their correct tab.
✅ Fixed precision 1 – uses SPLINEDIT polyline precision 1.
✅ Conversion verification – checks whether the original entity is no longer a SPLINE.
✅ Conversion summary – reports Converted Skipped and Failed totals.
✅ Persistent mode – remembers the selection mode.
✅ Dialog position memory – remembers the DCL screen location.
✅ Undo support – groups conversion operations.

Result:

🎯 The result is polyline geometry converted from selected or all valid SPLINE entities using SPLINEDIT precision 1.

Images, animations etc.

XAML code:

<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:src="clr-namespace:Autodesk.Windows;assembly=AdWindows">

<src:RibbonToolTip x:Key="Spline2Poly">
<src:RibbonToolTip.ExpandedContent>
<StackPanel>
<TextBlock Background="AntiqueWhite" TextAlignment="Left">
<Bold>Function Syntax: Spline2Poly</Bold>
<LineBreak/>
<Bold>Version: 1.0 Date: 20.06.2026 6:39:01PM</Bold>
<LineBreak/>
<Hyperlink>N/A</Hyperlink>

<Bold><Run Foreground="DodgerBlue">Description</Run></Bold><LineBreak/>
<Run Foreground="White">🧩 Spline2Poly converts AutoCAD SPLINE entities to polylines using SPLINEDIT Convert to Polyline with precision 1.</Run><LineBreak/>
<Run Foreground="White">🎛️ A dynamically generated DCL lets the user choose manual spline selection or conversion of all splines in the entire drawing.</Run><LineBreak/>
<Run Foreground="White">💾 Selection mode and dialog position are remembered in the AutoCAD configuration and during the current session.</Run><LineBreak/>
<LineBreak/>
<Bold><Run Foreground="DodgerBlue">Function Syntax</Run></Bold><LineBreak/>
<Run Foreground="White">Main command: </Run><Bold><Run Foreground="Orange">Spline2Poly</Run></Bold><LineBreak/>
<Run Foreground="White">Conversion engine: </Run><Bold><Run Foreground="Orange">SPLINEDIT Convert to Polyline precision 1</Run></Bold><LineBreak/>
<LineBreak/>
<Bold><Run Foreground="DodgerBlue">SEO Optimized Overview</Run></Bold><LineBreak/>
<Run Foreground="White">🎛️ The DCL is written to a unique temporary file on each run.</Run><LineBreak/>
<Run Foreground="White">🖱️ Manual mode asks the user to select SPLINE entities.</Run><LineBreak/>
<Run Foreground="White">🌐 All mode gathers all SPLINE entities in the complete drawing.</Run><LineBreak/>
<Run Foreground="White">🔒 Splines on locked or frozen layers are skipped.</Run><LineBreak/>
<Run Foreground="White">🗂️ The routine switches to the entity layout or model tab when required before calling SPLINEDIT.</Run><LineBreak/>
<Run Foreground="White">⚙️ SPLINEDIT converts the source using polyline precision 1.</Run><LineBreak/>
<Run Foreground="White">📊 The command tracks Converted Skipped and Failed totals.</Run><LineBreak/>
<Run Foreground="White">↩️ Processing is wrapped in an AutoCAD undo group and the original CTAB and CMDECHO values are restored.</Run><LineBreak/>
<LineBreak/>
<Bold><Run Foreground="LimeGreen">Primary Workflow</Run></Bold><LineBreak/>
<Run Foreground="White">• Run Spline2Poly.</Run><LineBreak/>
<Run Foreground="White">• Choose Select splines manually or Convert ALL splines in entire drawing.</Run><LineBreak/>
<Run Foreground="White">• Select splines when manual mode is used.</Run><LineBreak/>
<Run Foreground="White">• The routine checks layer state and entity layout.</Run><LineBreak/>
<Run Foreground="White">• SPLINEDIT converts each valid spline using precision 1.</Run><LineBreak/>
<Run Foreground="White">• Review Converted Skipped and Failed totals.</Run><LineBreak/>
<LineBreak/>
<Bold><Run Foreground="LimeGreen">Functionalities</Run></Bold><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Manual selection mode</Run></Bold><Run Foreground="White"> - converts only selected SPLINE entities.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">All drawing mode</Run></Bold><Run Foreground="White"> - converts every SPLINE found in the drawing.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Dynamic DCL</Run></Bold><Run Foreground="White"> - creates a unique temporary dialog file.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Locked layer protection</Run></Bold><Run Foreground="White"> - skips splines on locked layers.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Frozen layer protection</Run></Bold><Run Foreground="White"> - skips splines on frozen layers.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Layout switching</Run></Bold><Run Foreground="White"> - processes entities in their correct tab.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Fixed precision 1</Run></Bold><Run Foreground="White"> - uses SPLINEDIT polyline precision 1.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Conversion verification</Run></Bold><Run Foreground="White"> - checks whether the original entity is no longer a SPLINE.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Conversion summary</Run></Bold><Run Foreground="White"> - reports Converted Skipped and Failed totals.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Persistent mode</Run></Bold><Run Foreground="White"> - remembers the selection mode.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Dialog position memory</Run></Bold><Run Foreground="White"> - remembers the DCL screen location.</Run><LineBreak/>
<Run Foreground="White">✅ </Run><Bold><Run Foreground="LimeGreen">Undo support</Run></Bold><Run Foreground="White"> - groups conversion operations.</Run><LineBreak/>
<LineBreak/>
<Bold><Run Foreground="DodgerBlue">Important Commands and Aspects</Run></Bold><LineBreak/>
<Run Foreground="White">🧩 Spline2Poly:ConvertOneSpline performs SPLINEDIT conversion and verification.</Run><LineBreak/>
<Run Foreground="White">🧩 Spline2Poly:LayerLockedOrFrozenP validates the source layer.</Run><LineBreak/>
<Run Foreground="White">🧩 Spline2Poly:SetLayoutIfNeeded switches to the entity layout before conversion.</Run><LineBreak/>
<LineBreak/>
<Bold><Run Foreground="DodgerBlue">Result</Run></Bold><LineBreak/>
<Run Foreground="White">🎯 The result is polyline geometry converted from selected or all valid SPLINE entities using SPLINEDIT precision 1.</Run><LineBreak/>
<LineBreak/>
<Bold><Run Foreground="DarkRed">Important Notes</Run></Bold><LineBreak/>
<Run Foreground="White">⚠️ </Run><Bold><Run Foreground="DarkRed">The conversion precision is fixed at 1 in the current source.</Run></Bold><LineBreak/>
<Run Foreground="White">⚠️ </Run><Bold><Run Foreground="DarkRed">Locked or frozen layer splines are skipped.</Run></Bold><LineBreak/>
<Run Foreground="White">⚠️ </Run><Bold><Run Foreground="DarkRed">The command can temporarily switch layouts while processing splines from different tabs.</Run></Bold><LineBreak/>
<LineBreak/>
<Bold><Run Foreground="Yellow">SEO Keywords</Run></Bold><LineBreak/>
<Run Foreground="Yellow">🏷️ AutoCAD, 🏷️ Civil 3D, 🏷️ AutoLISP, 🏷️ Spline2Poly, 🏷️ SPLINEDIT, 🏷️ Spline conversion, 🏷️ Polyline, 🏷️ Dynamic DCL, 🏷️ Convert all splines, 🏷️ CAD cleanup</Run><LineBreak/>


<LineBreak/>
</TextBlock>
</StackPanel>
</src:RibbonToolTip.ExpandedContent>
</src:RibbonToolTip>
</ResourceDictionary>

Spline2Poly.xaml Download XAML file

Additional info:

Based on / Source code: Comming soon …

Share this page:

Page Tag: 🏷️ Dynamic DCL

Spline2Poly

Aug 13, 2026

—

by

Admin

Short description🧩 Spline2Poly converts AutoCAD SPLINE entities to polylines using SPLINEDIT Convert to Polyline with precision 1. 🎛️ A dynamically generated DCL lets the user choose manual spline selection or conversion of all splines in the entire drawing. 💾 Selection mode and dialog position are remembered in the AutoCAD configuration and during the current session.…