fix custom poly transform

examples/08_custom_bend_geometry.py

@@ -34,7 +34,8 @@ def main() -> None:
 
     # 4. Define a custom 'trapezoid' bend model
     # (Just for demonstration - we override the collision model during search)
-    custom_poly = Polygon([(0, 0), (20, 0), (20, 20), (0, 20)]) # Oversized box
+    # Define a custom centered 20x20 box
+    custom_poly = Polygon([(-10, -10), (10, -10), (10, 10), (-10, 10)])
     
     print("Routing with custom collision model...")
     # Override bend_collision_type with a literal Polygon

inire/geometry/components.py

@@ -434,7 +434,8 @@ def _apply_collision_model(
     Applies the specified collision model to an arc geometry.
     """
     if isinstance(collision_type, Polygon):
-        return [collision_type]
+        # Translate the custom polygon to the bend center (cx, cy)
+        return [shapely.transform(collision_type, lambda x: x + [cx, cy])]
 
     if collision_type == "arc":
         return [arc_poly]