Fix units being able to enter and leave Space via paths in the Spaceship biome.

GitOrigin-RevId: db7cb03ebbce1658e572ee7001ff1e6388afb2a2

Author: cpojer

athena/Radius.tsx

@@ -1,6 +1,12 @@
 import FastPriorityQueue from 'fastpriorityqueue';
 import { Skill } from './info/Skill.tsx';
-import { Bridge, TileInfo, TileTypes, TransitionCost } from './info/Tile.tsx';
+import {
+  Bridge,
+  Space,
+  TileInfo,
+  TileTypes,
+  TransitionCost,
+} from './info/Tile.tsx';
 import { UnitInfo } from './info/Unit.tsx';
 import canAccessBridge from './lib/canAccessBridge.tsx';
 import canLoad from './lib/canLoad.tsx';
@@ -86,8 +92,9 @@ export const MoveConfiguration = {
     if (maybeCancelTransitionCost) {
       return (parentCost === TransitionCost.Cancel &&
         currentCost === TransitionCost.Cancel) ||
-        parent.group === Bridge.group ||
-        current.group === Bridge.group
+        (parent.group === Bridge.group && current.group === Bridge.group) ||
+        (parent.group === Bridge.group && current !== Space) ||
+        (current.group === Bridge.group && parent !== Space)
         ? 0
         : Number.POSITIVE_INFINITY;
     }

athena/__tests__/Radius.test.tsx

@@ -2,10 +2,12 @@ import isPresent from '@deities/hephaestus/isPresent.tsx';
 import { expect, test } from 'vitest';
 import startMap from '../../hermes/map-fixtures/they-are-close-to-home.tsx';
 import { Skill } from '../info/Skill.tsx';
+import { Path, Space } from '../info/Tile.tsx';
 import {
   Battleship,
   Flamethrower,
   Humvee,
+  Jetpack,
   PatrolShip,
   XFighter,
 } from '../info/Unit.tsx';
@@ -1852,6 +1854,38 @@ test('correctly cancels transition costs in the Space biome', () => {
   `);
 });
 
+test('cannot enter or exit a Spaceship without a bridge', () => {
+  const vecA = vec(1, 2);
+  const vecB = vec(1, 1);
+  const unitA = Jetpack.create(1);
+  const map = MapData.createMap({
+    config: {
+      biome: 4,
+    },
+    map: [
+      Space.id,
+      Space.id,
+      Space.id,
+      Path.id,
+      Space.id,
+      Space.id,
+      Space.id,
+      Space.id,
+      Space.id,
+    ],
+    size: {
+      height: 3,
+      width: 3,
+    },
+  });
+
+  expect(
+    Array.from(moveable(map, unitA, vecA).keys()).sort(),
+  ).toMatchInlineSnapshot(`[]`);
+
+  expect(moveable(map, unitA, vecB).has(vecA)).toBeFalsy();
+});
+
 test('Naval units cannot access bridges unless they are below a Sea tile', () => {
   const map = radiusTestMap.copy({
     buildings: radiusTestMap.buildings.deleteAll(