From 320b53326da71632ce584c43f7af29f947e0a459 Mon Sep 17 00:00:00 2001
From: Adrian Mariano <avm4@cornell.edu>
Date: Fri, 15 May 2020 17:27:55 -0400
Subject: [PATCH] Added check for repeated end points to path_sweep

---
 skin.scad | 1 +
 1 file changed, 1 insertion(+)

diff --git a/skin.scad b/skin.scad
index 269d840..2dffad8 100644
--- a/skin.scad
+++ b/skin.scad
@@ -1136,6 +1136,7 @@ function path_sweep(shape, path, method="incremental", normal, closed=false, twi
   assert(is_integer(symmetry) && symmetry>0, "symmetry must be a positive integer")
   assert(is_path(shape,2), "shape must be a 2d path")
   assert(is_path(path), "input path is not a path")
+  assert(!closed || !approx(path[0],select(path,-1)), "Closed path includes start point at the end")
   let(
     path = path3d(path),
     caps = is_def(caps) ? caps :