From 4e80afb0da696863ee1a93e1fb38148a899d2535 Mon Sep 17 00:00:00 2001
From: ramox81 <184937705+ramox81@users.noreply.github.com>
Date: Mon, 24 Aug 2026 18:04:01 +0300
Subject: [PATCH] Show effective ring segment widths

---
 src/entities/lwpolyline.rs | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/entities/lwpolyline.rs b/src/entities/lwpolyline.rs
index e51bc8bb8..467d5cb72 100644
--- a/src/entities/lwpolyline.rs
+++ b/src/entities/lwpolyline.rs
@@ -852,8 +852,24 @@ fn properties(pline: &LwPolyline) -> Vec<PropSection> {
     let v = pline.vertices.get(vi);
     let vx = v.map_or(0.0, |v| v.location.x);
     let vy = v.map_or(0.0, |v| v.location.y);
-    let start_w = v.map_or(0.0, |v| v.start_width);
-    let end_w = v.map_or(0.0, |v| v.end_width);
+    // A constant width is the effective width of every segment whose
+    // per-vertex value is not overridden.  Showing the raw zero stored on
+    // those vertices made wide polylines (notably rings) claim that their
+    // visible segment width was zero even though the global width was active.
+    let start_w = v.map_or(0.0, |v| {
+        if v.start_width.abs() > 1.0e-12 {
+            v.start_width
+        } else {
+            pline.constant_width
+        }
+    });
+    let end_w = v.map_or(0.0, |v| {
+        if v.end_width.abs() > 1.0e-12 {
+            v.end_width
+        } else {
+            pline.constant_width
+        }
+    });
     let mp = <LwPolyline as crate::entities::traits::MassPropsCalc>::mass_props(pline);
     let cloud_arc_length = revision_cloud_arc_length(pline);
     let vertex_label = if n == 0 {