Route with A* step by step instead of only after A*

src/draw.rs

@@ -171,6 +171,7 @@ impl<'a> Draw<'a> {
             .prev()
             .map(|prev_dot| {
                 self.layout.remove_interior(&segbend);
+                self.layout.remove(head.dot);
 
                 Head {
                     dot: prev_dot,

src/main.rs

@@ -307,14 +307,14 @@ fn render_times(
                         }
                     }
                 }
-                let envelope = shape.envelope();
+                /*let envelope = shape.envelope();
                 let _ = canvas.rectangle(
                     envelope.lower()[0] as i16,
                     envelope.lower()[1] as i16,
                     envelope.upper()[0] as i16,
                     envelope.upper()[1] as i16,
                     Color::RGB(100, 100, 100),
-                );
+                );*/
             }
 
             /*for edge in router.routeedges() {

src/route.rs

@@ -36,17 +36,17 @@ impl<'a> Route<'a> {
         }
     }
 
-    pub fn finish(&mut self, trace: Trace, into: VertexIndex, width: f64) -> Result<(), ()> {
+    pub fn finish(&mut self, trace: &mut Trace, into: VertexIndex, width: f64) -> Result<(), ()> {
         let into_dot = self.mesh.dot(into);
         self.draw().finish(trace.head, into_dot, width)
     }
 
     pub fn rework_path(
         &mut self,
-        mut trace: Trace,
+        trace: &mut Trace,
         path: &[VertexIndex],
         width: f64,
-    ) -> Result<Trace, ()> {
+    ) -> Result<(), ()> {
         let prefix_length = trace
             .path
             .iter()
@@ -55,41 +55,37 @@ impl<'a> Route<'a> {
             .count();
 
         let length = trace.path.len();
-        trace = self.undo_path(trace, length - prefix_length)?;
+        self.undo_path(trace, length - prefix_length)?;
         self.path(trace, &path[prefix_length..], width)
     }
 
-    pub fn path(
-        &mut self,
-        mut trace: Trace,
-        path: &[VertexIndex],
-        width: f64,
-    ) -> Result<Trace, ()> {
+    pub fn path(&mut self, trace: &mut Trace, path: &[VertexIndex], width: f64) -> Result<(), ()> {
         for vertex in path {
-            trace = self.step(trace, *vertex, width)?;
+            self.step(trace, *vertex, width)?;
         }
-        Ok(trace)
+        Ok(())
     }
 
-    pub fn undo_path(&mut self, mut trace: Trace, step_count: usize) -> Result<Trace, ()> {
+    pub fn undo_path(&mut self, trace: &mut Trace, step_count: usize) -> Result<(), ()> {
         for _ in 0..step_count {
-            trace = self.undo_step(trace)?;
+            self.undo_step(trace)?;
         }
-        Ok(trace)
+        Ok(())
     }
 
-    pub fn step(&mut self, mut trace: Trace, to: VertexIndex, width: f64) -> Result<Trace, ()> {
+    pub fn step(&mut self, trace: &mut Trace, to: VertexIndex, width: f64) -> Result<(), ()> {
         let to_dot = self.mesh.dot(to);
         trace.head = self
             .draw()
             .segbend_around_dot(trace.head, to_dot, true, width)?;
-        Ok(trace)
+        trace.path.push(to);
+        Ok(())
     }
 
-    pub fn undo_step(&mut self, mut trace: Trace) -> Result<Trace, ()> {
+    pub fn undo_step(&mut self, trace: &mut Trace) -> Result<(), ()> {
         trace.head = self.draw().undo_segbend(trace.head).unwrap();
         trace.path.pop();
-        Ok(trace)
+        Ok(())
     }
 
     fn draw(&mut self) -> Draw {

src/router.rs

@@ -36,31 +36,32 @@ impl Router {
         let mut mesh = Mesh::new();
         mesh.triangulate(&self.layout)?;
 
+        let mut route = self.route(&mesh);
+        let mut trace = route.start(mesh.vertex(from));
+
         let (_cost, path) = astar(
             &mesh,
             mesh.vertex(from),
             |node, tracker| {
                 let new_path = tracker.reconstruct_path_to(node);
 
-                (node != mesh.vertex(to)).then_some(0)
+                if node == mesh.vertex(to) {
+                    route
+                        .rework_path(&mut trace, &new_path[..new_path.len() - 1], 5.0)
+                        .ok();
+                    route
+                        .finish(&mut trace, new_path[new_path.len() - 1], 5.0)
+                        .ok();
+                    None
+                } else {
+                    route.rework_path(&mut trace, &new_path, 5.0).ok();
+                    Some(0)
+                }
             },
             |_edge| 1,
             |_| 0,
         )
         .unwrap(); // TODO.
-
-        /*let path: Vec<DotIndex> = mesh_path
-        .iter()
-        .map(|vertex| self.mesh.dot(*vertex))
-        .collect();*/
-
-        let mut trace = self.route(&mesh).start(path[0]);
-        trace = self
-            .route(&mesh)
-            .path(trace, &path[1..(path.len() - 1)], 5.0)
-            .unwrap(); // TODO.
-        let _ = self.route(&mesh).finish(trace, path[path.len() - 1], 5.0);
-
         Ok(())
     }