From 5e6ddac19f8d2922593941a42326993f5d2acbe4 Mon Sep 17 00:00:00 2001
From: Mikolaj Wielgus <wielgusmikolaj@gmail.com>
Date: Tue, 10 Mar 2026 18:08:56 +0100
Subject: [PATCH] Import and display segments in pads

---
 topola-egui/src/displayer.rs | 34 ++++++++++++++++++++--
 topola/src/layout.rs         | 10 ++++++-
 topola/src/specctra.rs       | 56 ++++++++++++++++++++++++++++++++++--
 3 files changed, 94 insertions(+), 6 deletions(-)

diff --git a/topola-egui/src/displayer.rs b/topola-egui/src/displayer.rs
index 5ac4979..146991f 100644
--- a/topola-egui/src/displayer.rs
+++ b/topola-egui/src/displayer.rs
@@ -3,7 +3,7 @@
 // SPDX-License-Identifier: MIT OR Apache-2.0
 
 use crate::{viewport::Viewport, workspace::Workspace};
-use topola::{Joint, Polygon};
+use topola::{Joint, Polygon, Segment, SegmentId};
 
 pub struct Displayer {}
 
@@ -49,7 +49,18 @@ impl Displayer {
             self.paint_joint(ctx, ui, viewport, joint);
         }
 
-        // TODO.
+        for (i, segment) in workspace.board.layout().segments().collection() {
+            self.paint_segment(
+                ctx,
+                ui,
+                viewport,
+                segment,
+                workspace
+                    .board
+                    .layout()
+                    .segment_endpoints(SegmentId::new(i)),
+            );
+        }
 
         for (_, polygon) in workspace.board.layout().polygons().collection() {
             self.paint_polygon(ctx, ui, viewport, polygon);
@@ -64,12 +75,29 @@ impl Displayer {
         joint: &Joint,
     ) {
         ui.painter().circle_filled(
-            egui::Pos2::new(joint.position[0] as f32, joint.position[1] as f32),
+            egui::pos2(joint.position[0] as f32, joint.position[1] as f32),
             joint.radius as f32,
             egui::Color32::RED,
         );
     }
 
+    fn paint_segment(
+        &mut self,
+        ctx: &egui::Context,
+        ui: &egui::Ui,
+        viewport: &Viewport,
+        segment: &Segment,
+        endpoints: [[i64; 2]; 2],
+    ) {
+        ui.painter().line_segment(
+            [
+                egui::pos2(endpoints[0][0] as f32, endpoints[0][1] as f32),
+                egui::pos2(endpoints[1][0] as f32, endpoints[1][1] as f32),
+            ],
+            egui::Stroke::new(segment.half_width as f32 * 2.0, egui::Color32::RED),
+        );
+    }
+
     fn paint_polygon(
         &mut self,
         ctx: &egui::Context,
diff --git a/topola/src/layout.rs b/topola/src/layout.rs
index 39639e9..81717b4 100644
--- a/topola/src/layout.rs
+++ b/topola/src/layout.rs
@@ -51,7 +51,7 @@ impl SegmentId {
 
 #[derive(Clone, Copy, Debug)]
 pub struct Segment {
-    pub endpoints: [JointId; 2],
+    pub endjoints: [JointId; 2],
     pub layer: usize,
     pub half_width: u64,
 }
@@ -171,6 +171,14 @@ impl Layout {
     pub fn add_polygon(&mut self, polygon: Polygon) -> PolygonId {
         PolygonId::new(self.polygons.push(polygon))
     }
+
+    pub fn segment_endpoints(&self, segment: SegmentId) -> [[i64; 2]; 2] {
+        let endjoints = self.segments.get(&segment.id()).unwrap().endjoints;
+        [
+            self.joints.get(&endjoints[0].id()).unwrap().position,
+            self.joints.get(&endjoints[1].id()).unwrap().position,
+        ]
+    }
 }
 
 #[derive(Clone, Debug, Dissolve)]
diff --git a/topola/src/specctra.rs b/topola/src/specctra.rs
index 7ce39e8..0cbce85 100644
--- a/topola/src/specctra.rs
+++ b/topola/src/specctra.rs
@@ -8,6 +8,7 @@ use specctra::{
 };
 
 use crate::{
+    Segment,
     board::Board,
     layout::{Joint, Polygon},
     math::Vector2,
@@ -26,7 +27,7 @@ impl Board {
                 .collect(),
         );
 
-        // add pins from components
+        // Add pins from components.
         for component in &dsn.pcb.placement.components {
             let image = dsn
                 .pcb
@@ -66,7 +67,15 @@ impl Board {
                                 0,
                                 false,
                             ),
-                            // ... TODO.
+                            Shape::Path(path) => Self::place_path(
+                                &mut board,
+                                place.point_with_rotation(),
+                                pin.point_with_rotation(),
+                                &path.coords,
+                                path.width,
+                                0,
+                                false,
+                            ),
                             Shape::Polygon(polygon) => Self::place_polygon(
                                 &mut board,
                                 place.point_with_rotation(),
@@ -123,6 +132,49 @@ impl Board {
         });
     }
 
+    pub fn place_path(
+        board: &mut Board,
+        place: PointWithRotation,
+        pin: PointWithRotation,
+        coords: &[Point],
+        width: f64,
+        layer: usize,
+        flip: bool,
+    ) {
+        // Add the first coordinate in the wire path as a dot and save its index.
+        let mut prev_pos = Self::pos(place, pin, coords[0].x, coords[0].y, flip);
+        let mut prev_joint = board.add_joint(Joint {
+            position: prev_pos,
+            layer,
+            radius: (width / 2.0) as u64,
+        });
+
+        // Iterate through path coords starting from the second.
+        for coord in coords.iter().skip(1) {
+            let pos = Self::pos(place, pin, coord.x, coord.y, flip);
+
+            if pos == prev_pos {
+                continue;
+            }
+
+            let joint = board.add_joint(Joint {
+                position: pos,
+                radius: (width / 2.0) as u64,
+                layer,
+            });
+
+            // Add a seg between the current and previous coords.
+            let _ = board.add_segment(Segment {
+                endjoints: [prev_joint, joint],
+                layer,
+                half_width: (width / 2.0) as u64,
+            });
+
+            prev_pos = pos;
+            prev_joint = joint;
+        }
+    }
+
     pub fn place_polygon(
         board: &mut Board,
         place: PointWithRotation,