Multileader sizes no longer multiplied by DIMSCALE (#1648)

crates/engine/src/cmd/annotate.rs

@@ -427,13 +427,13 @@ fn mleader_kind(s: &Session, pts: &[Vec2], text: &str, landing: bool) -> Option<
     let d = s.doc().ok()?;
     let cur = d.header.str("CMLEADERSTYLE", "Standard");
     let st = d.mleader_styles.iter().find(|m| m.name.eq_ignore_ascii_case(&cur)).or(d.mleader_styles.first()).cloned().unwrap_or_default();
-    // An annotative style's sizes are paper sizes: the annotation scale applies when drawn.
+    // The style's sizes are the drawn sizes: a multileader style has no scale of its own and
-    let k = if st.annotative { 1.0 } else { d.header.f64("DIMSCALE", 1.0) };
+    // DIMSCALE (a dimension-style setting) does not apply, as in AutoCAD.
-    let th = st.text_height * k;
+    let th = st.text_height;
     let dir = if arrow_pts.first().is_some_and(|a| a.x > landing_pt.x) { -1.0 } else { 1.0 };
     let attach = if dir > 0.0 { 4 } else { 6 };
-    let dogleg = if landing { st.dogleg * k } else { 0.0 };
+    let dogleg = if landing { st.dogleg } else { 0.0 };
-    let tpos = *landing_pt + Vec2::new((dogleg + st.landing_gap * k) * dir, 0.0);
+    let tpos = *landing_pt + Vec2::new((dogleg + st.landing_gap) * dir, 0.0);
     Some(EntityKind::MLeader(MLeader {
         leaders: vec![arrow_pts.iter().map(|p| v3(*p)).collect()],
         landing: v3(*landing_pt),
@@ -451,7 +451,7 @@ fn mleader_kind(s: &Session, pts: &[Vec2], text: &str, landing: bool) -> Option<
             columns: None,
         }),
         style: st.name.clone(),
-        arrow_size: st.arrow_size * k,
+        arrow_size: st.arrow_size,
         spline: false,
         block: None,
     }))

crates/engine/tests/mleader_content.rs

@@ -121,3 +121,20 @@ fn json_form_takes_leader_type_and_block() {
         assert!(s.execute("mleader", &bad).is_err(), "{bad}");
     }
 }
+
+/// DIMSCALE belongs to dimension styles: a multileader keeps its style's text height, arrowhead
+/// and dogleg whatever DIMSCALE is (#1648).
+#[test]
+fn mleader_sizes_ignore_dimscale() {
+    let mut s = Session::new();
+    s.execute("mleaderstyle", &json!({"name": "M5", "textHeight": 5, "arrowSize": 5, "current": true})).unwrap();
+    s.execute("setvar", &json!({"name": "DIMSCALE", "value": 20})).unwrap();
+    s.execute("mleader", &json!({"points": [[0, 0], [30, 20]], "text": "CADCRAFT"})).unwrap();
+    let m = last_mleader(&s);
+    assert_eq!(m.arrow_size, 5.0);
+    let st = s.doc().unwrap().mleader_styles.iter().find(|x| x.name == "M5").unwrap().clone();
+    assert_eq!(m.dogleg, st.dogleg);
+    let t = m.text.unwrap();
+    assert_eq!(t.height, 5.0);
+    assert!((t.insert.x - (30.0 + st.dogleg + st.landing_gap)).abs() < 1e-9, "{}", t.insert.x);
+}