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ConvertMultiplePolylines

Short description

🧩 ConvertMultiplePolylines is an AutoCAD AutoLISP utility for converting LINE and legacy 2D POLYLINE geometry into a modern lightweight polyline workflow.
πŸŽ›οΈ The embedded DCL dialog lets the user process selected entities or all compatible entities in the drawing and define a joining fuzz distance.
πŸ”— A positive fuzz distance activates PEDIT joining with Extend jointype while a value of 0 performs conversion without joining.

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Command:

πŸš€ Main command: ConvertMultiplePolylines
πŸŽ›οΈ Processing modes: Select entities or All entities in drawing
πŸ“ Default joining fuzz distance: 0.01
πŸ”— Set joining fuzz distance to 0 for conversion only

Description:

🧩 ConvertMultiplePolylines combines old polyline conversion and PEDIT based joining in one AutoCAD command.
πŸ“ Supported source objects are LINE LWPOLYLINE and old style 2D POLYLINE entities.
πŸ”„ Old 2D POLYLINE objects are rebuilt as LWPOLYLINE entities before the final PEDIT operation.
🧬 The legacy polyline conversion preserves supported vertex coordinates widths bulges elevation closed state pline generation state layer linetype color linetype scale lineweight thickness normal and XData.
πŸŽ›οΈ The DCL interface provides Select entities and All entities in drawing modes together with an editable joining fuzz distance.
πŸ”— When the fuzz distance is greater than 0 the routine uses PEDIT Multiple Join with Extend jointype.
πŸ“Œ When the fuzz distance is 0 or less the routine performs conversion through PEDIT without the Join operation.
πŸ–±οΈ Selected entity mode first uses the current implied selection when available and otherwise prompts the user for objects.
🌐 All entities mode scans the drawing for LINE LWPOLYLINE and valid old style 2D POLYLINE entities.

Helper function: (if any)​

🧩 plm:_dialog creates and manages the temporary DCL conversion options interface.
🧩 plm:_is2dpoly identifies old style 2D POLYLINE entities while excluding 3D polylines polyface meshes and polygon meshes.
🧩 OldStyle2LwPolyline rebuilds a valid old 2D POLYLINE as an LWPOLYLINE and deletes the original after successful creation.
🧩 plm:_collect_pset_from_ss prepares a working selection set containing LINE LWPOLYLINE and converted 2D POLYLINE entities.
🧩 plm:_pset_has_lines detects whether PEDIT must answer Yes to convert LINE entities into polylines.
🧩 plm:_run_pedit performs the final PEDIT conversion or conversion plus joining operation.

Functionalities:

βœ… πŸŽ›οΈ Embedded DCL interface – provides processing mode and joining fuzz controls.
βœ… πŸ–±οΈ Selected entities mode – processes an implied selection or prompts for LINE LWPOLYLINE and POLYLINE objects.
βœ… 🌐 All entities mode – collects all compatible drawing entities automatically.
βœ… πŸ”„ Old 2D POLYLINE conversion – rebuilds legacy planar POLYLINE entities as LWPOLYLINE objects.
βœ… πŸ“ LINE conversion – uses PEDIT Multiple to convert LINE entities into polyline geometry.
βœ… πŸ”— Optional joining – joins compatible working geometry when the fuzz distance is greater than 0.
βœ… πŸ“ Adjustable fuzz distance – controls the maximum joining tolerance used by PEDIT.
βœ… ➑️ Extend jointype – uses the PEDIT Join Extend option when joining is enabled.
βœ… 🧬 Property preservation – transfers important entity and vertex properties from old 2D polylines.
βœ… 🚫 3D polyline exclusion – rejects 3D polylines polyface meshes and polygon meshes from legacy conversion.
βœ… πŸ’Ύ Persistent session defaults – remembers the last processing mode and fuzz value while the AutoCAD session remains active.

Result:

🎯 The result is a cleaned and modernized polyline set containing lightweight polyline geometry produced from compatible LINE and old 2D POLYLINE entities.
πŸ”— When joining is enabled compatible objects are also joined through PEDIT using the selected fuzz tolerance and Extend jointype.
🧰 The routine is useful for preparing legacy or fragmented CAD geometry for editing cleanup quantity takeoff boundary creation and Civil 3D workflows.

Images, animations etc.

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XAML code:

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<Bold>Function Syntax: ConvertMultiplePolylines</Bold>
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<Bold>Version: 1.0 Date: 20.06.2026 6:38:58PM</Bold>
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<Bold><Run Foreground="DodgerBlue">Description</Run></Bold><LineBreak/>
<Run Foreground="White">🧩 ConvertMultiplePolylines is an AutoCAD AutoLISP utility for converting and optionally joining LINE old 2D POLYLINE and LWPOLYLINE geometry.</Run><LineBreak/>
<Run Foreground="LimeGreen">πŸ“Œ The program combines </Run><Bold><Run Foreground="Orange">legacy 2D POLYLINE conversion</Run></Bold><Run Foreground="LimeGreen"> with </Run><Bold><Run Foreground="Orange">PEDIT joining</Run></Bold><Run Foreground="LimeGreen"> in one configurable workflow.</Run><LineBreak/>
<Run Foreground="White">πŸŽ›οΈ An embedded DCL dialog lets the user process selected entities or all compatible entities in the drawing and define the joining fuzz distance.</Run><LineBreak/>
<Bold><Run Foreground="DodgerBlue">Function Syntax</Run></Bold><LineBreak/>
<Run Foreground="White">πŸš€ Main command: </Run><Bold><Run Foreground="Orange">ConvertMultiplePolylines</Run></Bold><LineBreak/>
<Run Foreground="White">πŸŽ›οΈ Processing mode: </Run><Bold><Run Foreground="Orange">Select entities</Run></Bold><Run Foreground="White"> or </Run><Bold><Run Foreground="Orange">All entities in drawing</Run></Bold><LineBreak/>
<Run Foreground="White">πŸ“ Default joining fuzz distance: </Run><Bold><Run Foreground="Orange">0.01</Run></Bold><LineBreak/>
<Run Foreground="White">πŸ”— Set the fuzz distance to </Run><Bold><Run Foreground="Orange">0</Run></Bold><Run Foreground="White"> for conversion only with no joining.</Run><LineBreak/>
<Bold><Run Foreground="DodgerBlue">SEO Optimized Overview</Run></Bold><LineBreak/>
<Run Foreground="White">πŸ“ Supported source objects are </Run><Bold><Run Foreground="Orange">LINE</Run></Bold><Run Foreground="White"> </Run><Bold><Run Foreground="Orange">LWPOLYLINE</Run></Bold><Run Foreground="White"> and valid old style </Run><Bold><Run Foreground="Orange">2D POLYLINE</Run></Bold><Run Foreground="White"> entities.</Run><LineBreak/>
<Run Foreground="White">πŸ”„ Old 2D POLYLINE objects are rebuilt as modern LWPOLYLINE entities before the final PEDIT operation.</Run><LineBreak/>
<Run Foreground="White">🧬 The legacy conversion preserves supported vertex coordinates widths bulges elevation closed state pline generation state and important entity properties.</Run><LineBreak/>
<Run Foreground="White">πŸ”— When the fuzz distance is greater than 0 the routine uses </Run><Bold><Run Foreground="Orange">PEDIT Multiple Join</Run></Bold><Run Foreground="White"> with </Run><Bold><Run Foreground="Orange">Extend</Run></Bold><Run Foreground="White"> jointype.</Run><LineBreak/>
<Run Foreground="White">πŸ“Œ When the fuzz distance is 0 or less the routine performs the conversion workflow without the Join operation.</Run><LineBreak/>
<Run Foreground="White">πŸ–±οΈ Selected entities mode first uses the current implied AutoCAD selection when one is available and otherwise prompts for objects.</Run><LineBreak/>
<Run Foreground="White">🌐 All entities mode automatically searches the complete drawing for compatible LINE LWPOLYLINE and old 2D POLYLINE entities.</Run><LineBreak/>
<Bold><Run Foreground="LimeGreen">Primary Workflow</Run></Bold><LineBreak/>
<Run Foreground="White">β€’ Run </Run><Bold><Run Foreground="Orange">ConvertMultiplePolylines</Run></Bold><Run Foreground="White"> from the AutoCAD command line.</Run><LineBreak/>
<Run Foreground="White">β€’ Choose </Run><Bold><Run Foreground="Orange">Select entities</Run></Bold><Run Foreground="White"> or </Run><Bold><Run Foreground="Orange">All entities in drawing</Run></Bold><Run Foreground="White">.</Run><LineBreak/>
<Run Foreground="White">β€’ Enter the required </Run><Bold><Run Foreground="Orange">Joining fuzz distance</Run></Bold><Run Foreground="White">.</Run><LineBreak/>
<Run Foreground="White">β€’ In selected mode use the implied selection or select LINE LWPOLYLINE and POLYLINE objects.</Run><LineBreak/>
<Run Foreground="White">β€’ Valid old style 2D POLYLINE entities are converted to LWPOLYLINE objects.</Run><LineBreak/>
<Run Foreground="White">β€’ LINE and LWPOLYLINE objects are added to the working selection set.</Run><LineBreak/>
<Run Foreground="White">β€’ The routine runs </Run><Bold><Run Foreground="Orange">PEDIT</Run></Bold><Run Foreground="White"> for conversion only or conversion plus joining according to the fuzz value.</Run><LineBreak/>
<Bold><Run Foreground="LimeGreen">Functionalities</Run></Bold><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">Embedded DCL interface</Run></Bold><Run Foreground="White"> - provides processing mode and joining fuzz controls.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">Selected entities mode</Run></Bold><Run Foreground="White"> - processes only user selected compatible geometry.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">Implied selection support</Run></Bold><Run Foreground="White"> - uses already selected AutoCAD objects when available.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">All entities mode</Run></Bold><Run Foreground="White"> - automatically gathers compatible objects from the drawing.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">Old 2D POLYLINE conversion</Run></Bold><Run Foreground="White"> - rebuilds valid legacy planar polylines as modern LWPOLYLINE objects.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">LINE conversion</Run></Bold><Run Foreground="White"> - uses PEDIT Multiple to convert LINE objects into polyline geometry.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">Optional polyline joining</Run></Bold><Run Foreground="White"> - joins compatible objects when the fuzz distance is greater than 0.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">Adjustable fuzz tolerance</Run></Bold><Run Foreground="White"> - controls the maximum distance accepted by the PEDIT joining operation.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">Extend jointype</Run></Bold><Run Foreground="White"> - uses the PEDIT Join Extend option when joining is enabled.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">Vertex data preservation</Run></Bold><Run Foreground="White"> - retains coordinates start width end width and bulge data from old 2D polylines.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">Entity property preservation</Run></Bold><Run Foreground="White"> - retains supported layer linetype color linetype scale lineweight thickness normal and XData properties.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">3D geometry exclusion</Run></Bold><Run Foreground="White"> - prevents 3D polylines polyface meshes and polygon meshes from entering the legacy conversion.</Run><LineBreak/>
<Run Foreground="White">βœ… </Run><Bold><Run Foreground="LimeGreen">Session defaults</Run></Bold><Run Foreground="White"> - remembers the last processing mode and fuzz value while the AutoCAD session remains active.</Run><LineBreak/>
<Bold><Run Foreground="DodgerBlue">Important Commands and Aspects</Run></Bold><LineBreak/>
<Run Foreground="White">🧩 </Run><Bold><Run Foreground="Orange">OldStyle2LwPolyline</Run></Bold><Run Foreground="White"> rebuilds a valid old 2D POLYLINE as an LWPOLYLINE.</Run><LineBreak/>
<Run Foreground="White">🧩 </Run><Bold><Run Foreground="Orange">plm:_is2dpoly</Run></Bold><Run Foreground="White"> rejects 3D polylines polyface meshes and polygon meshes.</Run><LineBreak/>
<Run Foreground="White">🧩 </Run><Bold><Run Foreground="Orange">plm:_collect_pset_from_ss</Run></Bold><Run Foreground="White"> prepares the working selection set.</Run><LineBreak/>
<Run Foreground="White">🧩 </Run><Bold><Run Foreground="Orange">plm:_run_pedit</Run></Bold><Run Foreground="White"> performs conversion only or conversion plus joining.</Run><LineBreak/>
<Run Foreground="White">🧩 </Run><Bold><Run Foreground="Orange">PEDIT</Run></Bold><Run Foreground="White"> is the final AutoCAD conversion and joining engine.</Run><LineBreak/>
<Bold><Run Foreground="DodgerBlue">Result</Run></Bold><LineBreak/>
<Run Foreground="White">🎯 The result is a cleaned and modernized polyline set containing lightweight polyline geometry produced from compatible LINE and old 2D POLYLINE entities.</Run><LineBreak/>
<Run Foreground="White">πŸ”— When joining is enabled compatible geometry is also joined using the selected fuzz tolerance and Extend jointype.</Run><LineBreak/>
<Run Foreground="White">🧰 This workflow is useful for CAD cleanup legacy drawing conversion boundary preparation quantity takeoff and Civil 3D geometry preparation.</Run><LineBreak/>
<Bold><Run Foreground="DarkRed">Important Notes</Run></Bold><LineBreak/>
<Run Foreground="White">⚠️ </Run><Bold><Run Foreground="DarkRed">Only planar old style 2D POLYLINE entities are converted</Run></Bold><Run Foreground="White"> by the legacy conversion routine.</Run><LineBreak/>
<Run Foreground="White">⚠️ </Run><Bold><Run Foreground="DarkRed">3D polylines polyface meshes and polygon meshes are excluded</Run></Bold><Run Foreground="White"> from legacy conversion.</Run><LineBreak/>
<Run Foreground="White">⚠️ </Run><Bold><Run Foreground="DarkRed">A fuzz value greater than 0 enables joining</Run></Bold><Run Foreground="White"> while a value of 0 performs conversion only.</Run><LineBreak/>
<Run Foreground="White">⚠️ If the entered fuzz value cannot be interpreted as a distance the routine falls back to 0.01.</Run><LineBreak/>
<Run Foreground="White">⚠️ The original old 2D POLYLINE is deleted only after the replacement LWPOLYLINE has been created successfully.</Run><LineBreak/>
<Bold><Run Foreground="Yellow">SEO Keywords</Run></Bold><LineBreak/>
<Run Foreground="Yellow">🏷️ AutoCAD, 🏷️ Civil 3D, 🏷️ AutoLISP, 🏷️ ConvertMultiplePolylines, 🏷️ LWPOLYLINE, 🏷️ 2D POLYLINE, 🏷️ LINE conversion, 🏷️ PEDIT, 🏷️ Polyline join, 🏷️ Fuzz distance, 🏷️ Extend jointype, 🏷️ DCL, 🏷️ Legacy polyline conversion, 🏷️ CAD cleanup, 🏷️ CAD automation, 🏷️ CAD productivity</Run><LineBreak/>


  
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ConvertMultiplePolylines.xamlDownload XAML file

Additional info:

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    Page Tag: 🏷️ ConvertMultiplePolylines

    • ConvertMultiplePolylines

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      Short description🧩 ConvertMultiplePolylines is an AutoCAD AutoLISP utility for converting LINE and legacy 2D POLYLINE geometry into a modern lightweight polyline workflow. πŸŽ›οΈ The embedded DCL dialog lets the user process selected entities or all compatible entities in the drawing and define a joining fuzz distance. πŸ”— A positive fuzz distance activates PEDIT joining with…