From b0c90c554cabdc07ad4e18482c60595fd3b9a29b Mon Sep 17 00:00:00 2001
From: Jeroen Roos <gitlab@zoph.org>
Date: Thu, 21 May 2026 19:40:36 +0200
Subject: [PATCH] Fix for CGAL Error

Fixes the following error when running recent OpenSCAD versions

```
WARNING: CGAL error in CGAL_Nef_polyhedron3(): CGAL ERROR: assertion violation!
Expr: e_below != SHalfedge_handle()
File: /usr/include/CGAL/Nef_3/SNC_FM_decorator.h
Line: 418. Attempting union...
WARNING: CGALUtils::convertSurfaceMeshToNef: Discarded 80 facets during Nef conversion.

```
---
 utils/offset.scad | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utils/offset.scad b/utils/offset.scad
index 97374e3f..1afe808f 100644
--- a/utils/offset.scad
+++ b/utils/offset.scad
@@ -27,7 +27,7 @@ include <../utils/core/core.scad>
 module offset_3D(r, chamfer_base = false) { //! Offset 3D shape by specified radius `r`, positive or negative.
     module ball(r)
         if(chamfer_base)
-            rotate_extrude()
+            rotate_extrude(start=0)
                 intersection() {
                     rotate(180)
                         teardrop(0, r);