mouse camera controls

src/helpers/grid.rs

@@ -86,7 +86,13 @@ impl Plugin for GridPlugin {
         app.add_systems(Startup, generate_grid);
         app.add_systems(
             First,
-            (camera::movement, update_cursor_pos, click_tile).chain(),
+            (
+                camera::mouse_movement,
+                camera::mouse_zoom,
+                update_cursor_pos,
+                click_tile,
+            )
+                .chain(),
         );
         app.add_systems(Update, update_tiles);
     }
@@ -131,7 +137,6 @@ fn generate_grid(mut commands: Commands, asset_server: Res<AssetServer>) {
     });
 }
 
-// This is where we check which tile the cursor is hovered over.
 fn click_tile(
     buttons: Res<ButtonInput<MouseButton>>,
     cursor_pos: Res<CursorPos>,
@@ -146,18 +151,13 @@ fn click_tile(
     let offset = offset.single();
 
     for (map_size, grid_size, tile_storage, map_transform) in tilemap_q.iter() {
-        // Grab the cursor position from the `Res<CursorPos>`
         let cursor_pos: Vec2 = cursor_pos.0;
-        // We need to make sure that the cursor's world position is correct relative to the map
-        // due to any map transformation.
         let cursor_in_map_pos: Vec2 = {
-            // Extend the cursor_pos vec3 by 0.0 and 1.0
             let cursor_pos = Vec4::from((cursor_pos, 0.0, 1.0));
             let cursor_in_map_pos = map_transform.compute_matrix().inverse() * cursor_pos;
             cursor_in_map_pos.xy()
         };
 
-        // Once we have a world position we can transform it into a possible tile position.
         let Some(tile_pos) = TilePos::from_world_pos(
             &cursor_in_map_pos,
             map_size,