bevy_tiles 0.1.0

Bevy library for working with entities in grids.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147

use bevy::{
    diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
    math::Vec2Swizzles,
    prelude::*,
    sprite::SpriteBundle,
    window::PrimaryWindow,
    DefaultPlugins,
};
use bevy_tiles::{
    commands::TileCommandExt,
    coords::{calculate_chunk_coordinate, world_to_tile, CoordIterator},
    maps::TileMap,
    tiles_2d::*,
    TilesPlugin,
};
use std::ops::{Deref, DerefMut};

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .add_plugins(TilesPlugin)
        .add_plugins(LogDiagnosticsPlugin::default())
        .add_plugins(FrameTimeDiagnosticsPlugin)
        .add_systems(Startup, spawn)
        .add_systems(Update, (add_damage, check_damage).chain())
        .add_systems(PostUpdate, sync_tile_transforms)
        .run();
}

#[derive(Component)]
struct Block;

#[derive(Component)]
struct Damage(usize);

impl Deref for Damage {
    type Target = usize;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl DerefMut for Damage {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.0
    }
}

#[derive(Component)]
struct GameLayer;

fn spawn(mut commands: Commands, asset_server: Res<AssetServer>) {
    let block = asset_server.load("block.png");

    commands.spawn(Camera2dBundle {
        projection: OrthographicProjection {
            scale: 1.0,
            ..Camera2dBundle::default().projection
        },
        ..Default::default()
    });
    let mut tile_commands = commands.spawn_map(32, GameLayer);

    let sprite_bundle = SpriteBundle {
        texture: block,
        ..Default::default()
    };

    let size = 200;

    tile_commands.spawn_tile_batch(
        CoordIterator::new([-size, -size], [size, size]),
        move |_| (Block, sprite_bundle.clone()),
    );
}

fn add_damage(
    mut commands: Commands,
    mut block_maps: TileMapQuery<(Entity, Option<&mut Damage>), With<Block>>,
    map: Query<(Entity, &TileMap), With<GameLayer>>,
    windows: Query<&Window, With<PrimaryWindow>>,
    camera: Query<(&Camera, &GlobalTransform)>,
    buttons: Res<ButtonInput<MouseButton>>,
) {
    let (map_id, map) = map.single();
    let (cam, cam_t) = camera.single();
    let mut blocks = block_maps.get_map_mut(map_id).unwrap();

    let cursor_pos = windows
        .single()
        .cursor_position()
        .and_then(|cursor| cam.viewport_to_world(cam_t, cursor.xy()))
        .map(|ray| ray.origin.truncate())
        .map(|pos| world_to_tile(pos, 16.0));

    if let Some(damage_pos) = buttons
        .just_pressed(MouseButton::Left)
        .then_some(cursor_pos)
        .flatten()
    {
        let start = [damage_pos[0] - 2, damage_pos[1] - 2];
        let end = [damage_pos[0] + 2, damage_pos[1] + 2];
        for (block_id, damage) in blocks.iter_in_mut(start, end) {
            if let Some(mut damage) = damage {
                **damage += 1;
            } else {
                commands.entity(block_id).insert(Damage(1));
            }
        }
    }
    if let Some(damage_pos) = buttons
        .just_pressed(MouseButton::Right)
        .then_some(cursor_pos)
        .flatten()
    {
        let chunk_c = calculate_chunk_coordinate(damage_pos, map.get_chunk_size());
        commands.tile_map(map_id).despawn_chunk(chunk_c);
    }
}

fn check_damage(
    mut commands: Commands,
    mut damaged: Query<(Entity, &Damage, &mut Sprite), Changed<Damage>>,
) {
    for (id, damage, mut sprite) in damaged.iter_mut() {
        match **damage {
            x if x > 3 => commands.entity(id).despawn(),
            x => {
                let tint = 1.0 - x as f32 / 3.0;
                sprite.color = Color::Rgba {
                    red: 1.0,
                    green: tint,
                    blue: tint,
                    alpha: 1.0,
                }
            }
        }
    }
}

fn sync_tile_transforms(mut tiles: Query<(&TileCoord, &mut Transform), Changed<TileCoord>>) {
    for (tile_c, mut transform) in tiles.iter_mut() {
        transform.translation.x = tile_c[0] as f32 * 16.0;
        transform.translation.y = tile_c[1] as f32 * 16.0;
    }
}