occlusion part 2

src/game.rs

@@ -6,7 +6,8 @@ use bevy::prelude::*;
 use noise::{NoiseFn, Perlin};
 use rand::prelude::*;
 
-pub const Z_INDEX: f32 = 0.;
+#[derive(Resource)]
+pub struct ZIndex(pub f32);
 
 pub fn setup_level(mut commands: Commands, asset_server: Res<AssetServer>) {
     setup_tilemap(&mut commands, &asset_server);
@@ -26,9 +27,9 @@ pub fn setup_level(mut commands: Commands, asset_server: Res<AssetServer>) {
 fn setup_tilemap(commands: &mut Commands, asset_server: &Res<AssetServer>) {
     let perlin = Perlin::new(0);
 
-    for x in -15..15 {
+    for x in -50..50 {
-        for y in -15..15 {
+        for y in -50..50 {
-            for z in -2..15 {
+            for z in -5..40 {
                 let position = Vec3::new(x as f32 * TILE_SIZE, y as f32 * TILE_SIZE, -z as f32);
 
                 // Generate Perlin noise value

src/main.rs

@@ -1,16 +1,17 @@
 use bevy::prelude::*;
 
-mod constants;
 mod camera;
 mod citizen;
+mod constants;
+mod cursor;
 mod game;
 mod item;
 mod tile;
 mod tiles;
-mod cursor;
 
 fn main() {
     App::new()
+        .insert_resource(game::ZIndex(-5.0))
         .add_plugins(
             DefaultPlugins
                 .set(WindowPlugin {
@@ -24,7 +25,7 @@ fn main() {
         )
         .insert_resource(ClearColor(Color::srgb(0.0, 0.0, 0.0)))
         .add_systems(Startup, (game::setup_level, camera::spawn_panning_camera))
-        .add_systems(PostStartup, tile::tile_sprite_occlusion_update)
+        .add_systems(PostStartup, tile::tile_sprite_occlusion)
         .add_systems(Startup, cursor::setup_curor)
         .add_systems(
             FixedUpdate,
@@ -32,6 +33,7 @@ fn main() {
                 camera::camera_movement,
                 citizen::citizen_movement,
                 tile::tile_item_sprite_update,
+                // tile::camera_z_movement.chain(tile::tile_sprite_occlusion),
             ),
         )
         .add_systems(FixedUpdate, cursor::move_cursor)

src/tile.rs

@@ -1,9 +1,6 @@
 use crate::item::Item;
-use crate::{constants::*, game};
+use crate::game;
-use bevy::math::vec2;
 use bevy::prelude::*;
-use std::collections::HashMap;
-use std::process::exit;
 
 #[derive(Component)]
 #[require(Sprite)]
@@ -58,65 +55,93 @@ pub struct DoorTile {
     pub locked: bool,
 }
 
-pub fn tile_sprite_occlusion_update(
+// pub fn camera_z_movement(
+//     keyboard_input: Res<ButtonInput<KeyCode>>,
+//     mut z_index: ResMut<game::ZIndex>,
+// ) {
+//     if keyboard_input.pressed(KeyCode::ShiftLeft) {
+//         z_index.0 -= 1.0;
+//     }
+//     if keyboard_input.pressed(KeyCode::ShiftRight) {
+//         z_index.0 += 1.0;
+//     }
+// }
+
+pub fn tile_sprite_occlusion(
     mut query: Query<(&mut Visibility, &Transform, &Tile), With<Tile>>,
     tile_query: Query<(&Transform, &Tile)>,
+    z_index: ResMut<game::ZIndex>,
 ) {
-    let mut z_map: HashMap<(i32, i32), i32> = HashMap::new();
+    use std::collections::HashMap;
 
-    for (mut visibility, transform, tile) in query.iter_mut() {
+    // Build spatial lookup
-        *visibility = Visibility::Hidden;
+    let tile_map: HashMap<(i32, i32, i32), &Tile> = tile_query
-
+        .iter()
-        if transform.translation.z > game::Z_INDEX {
+        .map(|(transform, tile)| {
-            continue;
+            (
-        }
+                (
-        if let Some(z_val) = z_map.get(&(
                     transform.translation.x.round() as i32,
                     transform.translation.y.round() as i32,
-        )) {
+                    transform.translation.z.round() as i32,
-            if *z_val >= transform.translation.z as i32 {
+                ),
-                continue;
+                tile,
+            )
+        })
+        .collect();
+
+    query
+        .par_iter_mut()
+        .for_each(|(mut visibility, transform, _)| {
+            *visibility = Visibility::Hidden;
+
+            // Early exit for above camera layer
+            if transform.translation.z > z_index.0 {
+                return;
+            }
+
+            let pos = (
+                transform.translation.x.round() as i32,
+                transform.translation.y.round() as i32,
+                transform.translation.z.round() as i32,
+            );
+
+            // Check for any opaque tiles above the current tile
+            for z_offset in 1..=100 {
+                // Adjust the max height of the check if needed
+                let above_pos = (pos.0, pos.1, pos.2 + z_offset);
+                // look up until camera height
+                if above_pos.2 <= z_index.0 as i32 {
+                    // get any tiles
+                    if let Some(neighbor_tile) = tile_map.get(&above_pos) {
+                        // If there's an opaque tile above, hide the current tile
+                        if neighbor_tile.opaque {
+                            return; // No need to check further; the tile should remain hidden
+                        }
+                    }
                 }
             }
 
+            // Check all neighbors around the tile
             for x_offset in -1..=1 {
                 for y_offset in -1..=1 {
                     for z_offset in -1..=1 {
                         if x_offset == 0 && y_offset == 0 && z_offset == 0 {
-                        continue; // don't check against itself
+                            continue;
                         }
-                    let neighbor_position = transform.translation
-                        + Vec3::new(
-                            x_offset as f32 * TILE_SIZE,
-                            y_offset as f32 * TILE_SIZE,
-                            z_offset as f32 * TILE_SIZE,
-                        );
 
-                    if let Some((_, neighbor_tile)) =
+                        let neighbor_pos = (pos.0 + x_offset, pos.1 + y_offset, pos.2 + z_offset);
-                        tile_query.iter().find(|(neighbor_transform, _)| {
+
-                            neighbor_transform.translation == neighbor_position
+                        if let Some(neighbor_tile) = tile_map.get(&neighbor_pos) {
-                        })
+                            // id == 0 is sky
-                    {
-                        // id == 0 is sky. So if bordering a sky tile (i.e. not deep underground)
                             if neighbor_tile.id == 0 {
                                 *visibility = Visibility::Visible;
-                            // if opaque, do not look deeper on this X,Y
-                            if tile.opaque {
-                                z_map.insert(
-                                    (
-                                        transform.translation.x.round() as i32,
-                                        transform.translation.y.round() as i32,
-                                    ),
-                                    transform.translation.z.round() as i32,
-                                );
-                            }
                                 break;
                             }
                         }
                     }
                 }
             }
-    }
+        });
 }
 
 pub fn tile_item_sprite_update(

src/tiles.rs

@@ -93,4 +93,21 @@ impl TilePrefab {
             },
         }
     }
+
+    pub fn underground(position: Vec3, asset_server: &Res<AssetServer>) -> Self {
+        TilePrefab {
+            transform: Transform::from_translation(position).with_scale(Vec3::splat(PIXEL_RATIO)),
+            sprite: Sprite {
+                image: asset_server.load("underground.png"),
+                ..Default::default()
+            },
+            tile: Tile {
+                id: 5,
+                opaque: true,
+            },
+            tile_state: TileState {
+                timer: Timer::from_seconds(1.0, TimerMode::Repeating),
+            },
+        }
+    }
 }