Function Syntax: Spline2Poly Version: 1.0 Date: 20.06.2026 6:39:01PM N/A 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. Function Syntax Main command: Spline2Poly Conversion engine: SPLINEDIT Convert to Polyline precision 1 SEO Optimized Overview 🎛️ 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. Primary Workflow • Run Spline2Poly. • Choose Select splines manually or Convert ALL splines in entire drawing. • Select splines when manual mode is used. • The routine checks layer state and entity layout. • SPLINEDIT converts each valid spline using precision 1. • Review Converted Skipped and Failed totals. 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. Important Commands and Aspects 🧩 Spline2Poly:ConvertOneSpline performs SPLINEDIT conversion and verification. 🧩 Spline2Poly:LayerLockedOrFrozenP validates the source layer. 🧩 Spline2Poly:SetLayoutIfNeeded switches to the entity layout before conversion. Result 🎯 The result is polyline geometry converted from selected or all valid SPLINE entities using SPLINEDIT precision 1. Important Notes ⚠️ The conversion precision is fixed at 1 in the current source. ⚠️ Locked or frozen layer splines are skipped. ⚠️ The command can temporarily switch layouts while processing splines from different tabs. SEO Keywords 🏷️ AutoCAD, 🏷️ Civil 3D, 🏷️ AutoLISP, 🏷️ Spline2Poly, 🏷️ SPLINEDIT, 🏷️ Spline conversion, 🏷️ Polyline, 🏷️ Dynamic DCL, 🏷️ Convert all splines, 🏷️ CAD cleanup