From 950fa39b0f344cf5a1399c676e8579ec7010fe6f Mon Sep 17 00:00:00 2001
From: bherbruck <brennen.herbruck@gmail.com>
Date: Thu, 8 Oct 2026 01:59:53 +0000
Subject: [PATCH] Coil dialog; value box for curve-based dialogs (pipe, rib,
 path pattern) at the picked curve

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL
---
 crates/ui-egui/src/canvas.rs  | 5 +++++
 crates/ui-egui/src/dialogs.rs | 9 +++++++++
 2 files changed, 14 insertions(+)

diff --git a/crates/ui-egui/src/canvas.rs b/crates/ui-egui/src/canvas.rs
index fe7461e8..1e73636a 100644
--- a/crates/ui-egui/src/canvas.rs
+++ b/crates/ui-egui/src/canvas.rs
@@ -29,6 +29,11 @@ pub fn anchor(app: &SolveApp, d: &Dialog) -> Option<(Vec3, Option<Vec3>)> {
         Sel::Face { body, index, point } => (*point, crate::dialogs::planar_face(&app.session, body, *index).map(|(_, n)| n)),
         Sel::Edge { body, index, point } => (*point, st.body(body).and_then(|b| edge_bisector(&b.mesh(), *index, *point))),
         Sel::Vertex { point, .. } => (*point, None),
+        Sel::SketchCurve { id } => {
+            let ss = st.sketches.iter().rev().find(|ss| ss.sketch.curve_index(id).is_some())?;
+            let pts = ss.sketch.polyline(ss.sketch.curve_index(id)?);
+            (ss.plane.to_world(*pts.get(pts.len() / 2)?), None)
+        }
         Sel::Body { name } => (st.body(name)?.mesh().bounds().center(), None),
         Sel::Plane { name } => {
             let pl = solvecraft_engine::geom::Plane::named(name).or_else(|| {
diff --git a/crates/ui-egui/src/dialogs.rs b/crates/ui-egui/src/dialogs.rs
index f39f8074..b94bc072 100644
--- a/crates/ui-egui/src/dialogs.rs
+++ b/crates/ui-egui/src/dialogs.rs
@@ -350,6 +350,14 @@ impl Dialog {
                 Kind::Primitive { cmd: "PrimitiveTorus", fields: vec![("major", "20".into()), ("minor", "5".into())], operation: 0 },
                 vec![],
             ),
+            "PrimitiveCoil" => Dialog::new(
+                Kind::Primitive {
+                    cmd: "PrimitiveCoil",
+                    fields: vec![("diameter", "40".into()), ("revolutions", "4".into()), ("pitch", "8".into()), ("section_size", "3".into())],
+                    operation: 0,
+                },
+                vec![],
+            ),
             "FusionCombineCommand" => Dialog::new(
                 Kind::Combine { operation: 1, keep_tools: false },
                 vec![SelInput::new("Target body", BODIES, false), SelInput::new("Tool bodies", BODIES, true)],
@@ -647,6 +655,7 @@ fn title(k: &Kind) -> &'static str {
             "PrimitiveBox" => "BOX",
             "PrimitiveCylinder" => "CYLINDER",
             "PrimitiveSphere" => "SPHERE",
+            "PrimitiveCoil" => "COIL",
             _ => "TORUS",
         },
         Kind::Combine { .. } => "COMBINE",