refactor: switch NodeId to u16, use I8Vec2 for grid coordinates

tests/collision.rs

@@ -5,7 +5,8 @@ use pacman::{
     events::GameEvent,
     map::builder::Map,
     systems::{
-        check_collision, collision_system, Collider, EntityType, Ghost, GhostCollider, ItemCollider, PacmanCollider, Position,
+        check_collision, collision_system, Collider, EntityType, Ghost, GhostCollider, ItemCollider, NodeId, PacmanCollider,
+        Position,
     },
 };
 
@@ -59,7 +60,7 @@ fn spawn_test_ghost(world: &mut World) -> Entity {
 fn spawn_test_ghost_at_node(world: &mut World, node: usize) -> Entity {
     world
         .spawn((
-            Position::Stopped { node },
+            Position::Stopped { node: node as NodeId },
             Collider { size: 12.0 },
             GhostCollider,
             Ghost::Blinky,

tests/direction.rs

@@ -1,4 +1,4 @@
-use glam::IVec2;
+use glam::I8Vec2;
 use pacman::map::direction::*;
 
 #[test]
@@ -18,14 +18,14 @@ fn test_direction_opposite() {
 #[test]
 fn test_direction_as_ivec2() {
     let test_cases = [
-        (Direction::Up, -IVec2::Y),
-        (Direction::Down, IVec2::Y),
-        (Direction::Left, -IVec2::X),
-        (Direction::Right, IVec2::X),
+        (Direction::Up, -I8Vec2::Y),
+        (Direction::Down, I8Vec2::Y),
+        (Direction::Left, -I8Vec2::X),
+        (Direction::Right, I8Vec2::X),
     ];
 
     for (dir, expected) in test_cases {
         assert_eq!(dir.as_ivec2(), expected);
-        assert_eq!(IVec2::from(dir), expected);
+        assert_eq!(I8Vec2::from(dir), expected);
     }
 }

tests/map_builder.rs

@@ -26,8 +26,10 @@ fn test_map_node_positions() {
 
     for (grid_pos, &node_id) in &map.grid_to_node {
         let node = map.graph.get_node(node_id).unwrap();
-        let expected_pos = Vec2::new((grid_pos.x * CELL_SIZE as i32) as f32, (grid_pos.y * CELL_SIZE as i32) as f32)
-            + Vec2::splat(CELL_SIZE as f32 / 2.0);
+        let expected_pos = Vec2::new(
+            (grid_pos.x as i32 * CELL_SIZE as i32) as f32,
+            (grid_pos.y as i32 * CELL_SIZE as i32) as f32,
+        ) + Vec2::splat(CELL_SIZE as f32 / 2.0);
 
         assert_eq!(node.position, expected_pos);
     }