From 5b62f2859aa9c3d2d34f2acc21b7ae4cf6c1480b Mon Sep 17 00:00:00 2001
From: Adrian Mariano <avm4@cornell.edu>
Date: Thu, 11 Nov 2021 22:43:19 -0500
Subject: [PATCH] catch case where endcaps are too long for path in stroke()
 make rect() default to centered

---
 drawing.scad  | 1 +
 shapes2d.scad | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drawing.scad b/drawing.scad
index 7968a0a..78e0a02 100644
--- a/drawing.scad
+++ b/drawing.scad
@@ -302,6 +302,7 @@ module stroke(
                 translate(path[0]) sphere(d=width[0]);
             }
         } else {
+            dummy=assert(trim1<path_length(path)-trim2, "Path is too short for endcap(s).  Try a smaller width, or set endcap_length to a smaller value.");
             pathcut = _path_cut_points(path, [trim1, path_length(path)-trim2], closed=false);
             pathcut_su = _cut_to_seg_u_form(pathcut,path);
             path2 = _path_cut_getpaths(path, pathcut, closed=false)[1];
diff --git a/shapes2d.scad b/shapes2d.scad
index 8a75c9b..1349dcf 100644
--- a/shapes2d.scad
+++ b/shapes2d.scad
@@ -106,7 +106,7 @@ module square(size=1, center, anchor, spin) {
 //   move_copies(path) color("blue") circle(d=2,$fn=8);
 module rect(size=1, center, rounding=0, chamfer=0, anchor, spin=0) {
     size = is_num(size)? [size,size] : point2d(size);
-    anchor = get_anchor(anchor, center, FRONT+LEFT, FRONT+LEFT);
+    anchor = point2d(get_anchor(anchor, center));
     if (rounding==0 && chamfer==0) {
         attachable(anchor,spin, two_d=true, size=size) {
             square(size, center=true);
@@ -128,7 +128,7 @@ function rect(size=1, center, rounding=0, chamfer=0, anchor, spin=0) =
     assert(is_num(rounding) || len(rounding)==4)
     let(
         size = is_num(size)? [size,size] : point2d(size),
-        anchor = point2d(get_anchor(anchor, center, FRONT+LEFT, FRONT+LEFT)),
+        anchor = point2d(get_anchor(anchor, center)),
         complex = rounding!=0 || chamfer!=0
     )
     (rounding==0 && chamfer==0)? let(