examples work

examples/09_unroutable_best_effort.py

@@ -0,0 +1,46 @@
+from inire.geometry.collision import CollisionEngine
+from inire.geometry.primitives import Port
+from inire.router.astar import AStarRouter
+from inire.router.cost import CostEvaluator
+from inire.router.danger_map import DangerMap
+from inire.router.pathfinder import PathFinder, RoutingResult
+from inire.utils.visualization import plot_routing_results
+from shapely.geometry import box
+
+def main() -> None:
+    print("Running Example 09: Unroutable Nets & Best Effort Display...")
+
+    bounds = (0, 0, 100, 100)
+    engine = CollisionEngine(clearance=2.0)
+    
+    # A large obstacle that completely blocks the target port
+    blocking_obs = box(40, 0, 60, 100)
+    engine.add_static_obstacle(blocking_obs)
+    
+    danger_map = DangerMap(bounds=bounds)
+    danger_map.precompute([blocking_obs])
+    evaluator = CostEvaluator(engine, danger_map)
+    
+    # Use a low node limit to fail quickly
+    router = AStarRouter(evaluator, node_limit=5000)
+    
+    netlist = {
+        "blocked_net": (Port(10, 50, 0), Port(90, 50, 180))
+    }
+    
+    print("Routing blocked net (expecting failure)...")
+    # Manually call route with return_partial=True
+    path = router.route(netlist["blocked_net"][0], netlist["blocked_net"][1], 2.0, 
+                        net_id="blocked_net", return_partial=True)
+    
+    # Wrap in RoutingResult. Even if path is returned, is_valid=False
+    results = {
+        "blocked_net": RoutingResult("blocked_net", path if path else [], False, 1)
+    }
+
+    fig, ax = plot_routing_results(results, [blocking_obs], bounds, netlist=netlist)
+    fig.savefig("examples/09_unroutable_best_effort.png")
+    print("Saved plot to examples/09_unroutable_best_effort.png")
+
+if __name__ == "__main__":
+    main()