gdritter repos wenaglia / 6cfed23
Switch to using specs ECS for the stuff Getty Ritter 5 years ago
3 changed file(s) with 509 addition(s) and 80 deletion(s). Collapse all Expand all
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Cargo.lock less more
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Cargo.toml less more
88 ggez = "0.4.4"
99 tiled = "0.8"
1010 itertools = "0.8"
11 specs = "0.14"
12 specs-derive = "0.4"⏎
+124
-80
src/main.rs less more
1 #[macro_use] extern crate itertools;
1 #[macro_use] extern crate specs_derive;
22
33 use ggez::{Context, ContextBuilder, GameResult};
44 use ggez::event::{self, EventHandler};
55 use ggez::graphics;
66
77 use std::path::Path;
8 use specs::{Component, RunNow, System, NullStorage, VecStorage};
9 use specs::world::Builder;
810
911 #[allow(dead_code)]
1012 mod consts {
1921 tiled::PropertyValue::BoolValue(true);
2022 }
2123
22 #[derive(Debug)]
23 struct Board {
24 tiles: Vec<Option<Tile>>,
25 entities: Vec<Option<Tile>>,
26 decoration: Vec<Option<Tile>>,
24 #[derive(Component, Debug)]
25 #[storage(VecStorage)]
26 struct Position {
27 x: f32,
28 y: f32,
2729 }
2830
29 impl Board {
30 fn from_file(path: &Path) -> Board {
31 let tiled::Map {
32 tilesets,
33 layers,
34 ..
35 } = tiled::parse_file(path).unwrap();
36 let read_layer = |idx: usize| {
37 layers[idx].tiles.iter()
38 .flat_map(|row| row)
39 .map(|&n| if n > 0 {
40 Some(Tile::from_tileset(n, &tilesets[0]))
41 } else {
42 None
43 })
44 .collect()
45 };
46 let tiles = read_layer(0);
47 let entities = read_layer(1);
48 let decoration = read_layer(2);
49 Board {
50 tiles,
51 entities,
52 decoration,
53 }
54 }
55
56 fn draw() {
57
31 impl Position {
32 fn to_point(&self) -> ggez::nalgebra::Point2<f32> {
33 ggez::nalgebra::Point2::new(self.x, self.y)
5834 }
5935 }
6036
61 #[derive(Debug, Clone)]
62 struct Tile {
63 action: Action,
64 sprite: (u8, u8),
65 pass: bool,
37 #[derive(Component, Debug)]
38 #[storage(VecStorage)]
39 struct Sprite {
40 u: u8,
41 v: u8,
6642 }
6743
68 impl Tile {
69 fn from_tileset(n: u32, tileset: &tiled::Tileset) -> Tile {
70 let x = (n - 1) % 32;
71 let y = (n - x - 1) / 32;
72 let pass = tileset.tiles[n as usize].properties.get("pass").eq(
73 &Some(&consts::TILED_TRUE));
74 Tile {
75 action: Action::NoAction,
76 sprite: (x as u8, y as u8),
77 pass: pass,
78 }
79 }
80
81 fn draw(&self, (y, x): (usize, usize)) -> graphics::DrawParam {
82 let (tx, ty) = self.sprite;
83 graphics::DrawParam {
84 src: graphics::Rect {
85 x: (1.0 / 32.0) * tx as f32,
86 y: (1.0 / 32.0) * ty as f32,
87 w: 1.0 / 32.0,
88 h: 1.0 / 32.0,
89 },
90 dest: ggez::nalgebra::Point2::new(
91 x as f32 * 24.0, y as f32 * 24.0),
92 ..Default::default()
44 impl Sprite {
45 fn to_rect(&self) -> graphics::Rect {
46 graphics::Rect {
47 x: (1.0 / 32.0) * self.u as f32,
48 y: (1.0 / 32.0) * self.v as f32,
49 w: 1.0 / 32.0,
50 h: 1.0 / 32.0,
9351 }
9452 }
9553 }
9654
97 #[derive(Debug, Clone)]
98 enum Action {
99 NoAction,
55 #[derive(Debug, Copy, Clone)]
56 enum DrawLayer {
57 Background,
58 Foreground,
59 Decoration,
60 }
61
62 static DRAW_LAYERS: [DrawLayer;3] = [
63 DrawLayer::Background,
64 DrawLayer::Foreground,
65 DrawLayer::Decoration,
66 ];
67
68 #[derive(Component, Default, Debug)]
69 #[storage(NullStorage)]
70 struct Background;
71
72 #[derive(Component, Default, Debug)]
73 #[storage(NullStorage)]
74 struct Foreground;
75
76 #[derive(Component, Default, Debug)]
77 #[storage(NullStorage)]
78 struct Decoration;
79
80 fn world_from_file(w: &mut specs::World, path: &Path) {
81 let tiled::Map {
82 layers,
83 ..
84 } = tiled::parse_file(path).unwrap();
85
86 for (phase, layer) in DRAW_LAYERS.iter().zip(layers) {
87 for (row, y) in layer.tiles.iter().zip(0..) {
88 for (&n, x) in row.iter().zip(0..) {
89 if n != 0 {
90 let x = x as f32 * 24.0;
91 let y = y as f32 * 24.0;
92 let u = ((n - 1) % 32) as u8;
93 let v = ((n - u as u32 - 1) / 32) as u8;
94 let mut e = w.create_entity()
95 .with(Position { x, y })
96 .with(Sprite { u, v });
97 e = match phase {
98 DrawLayer::Background => e.with(Background),
99 DrawLayer::Foreground => e.with(Foreground),
100 DrawLayer::Decoration => e.with(Decoration),
101 };
102 e.build();
103 }
104 }
105 }
106 }
100107 }
101108
102109 struct MyGame {
103 board: Board,
110 world: specs::World,
104111 sprites: graphics::spritebatch::SpriteBatch,
112 }
113
114 struct Draw<'t, Phase> {
115 ctx: &'t mut Context,
116 sprites: &'t mut graphics::spritebatch::SpriteBatch,
117 _phase: Phase,
118 }
119
120 impl<'a, 't, Phase: Component> System<'a> for Draw<'t, Phase> {
121 type SystemData = (
122 specs::ReadStorage<'a, Position>,
123 specs::ReadStorage<'a, Sprite>,
124 specs::ReadStorage<'a, Phase>,
125 );
126
127 fn run(&mut self, (positions, sprites, phase): Self::SystemData) {
128 use specs::Join;
129
130 for (pos, spr, _) in (&positions, &sprites, &phase).join() {
131 let param = graphics::DrawParam {
132 src: spr.to_rect(),
133 dest: pos.to_point(),
134 ..Default::default()
135 };
136 self.sprites.add(param);
137 graphics::draw(
138 self.ctx,
139 self.sprites,
140 ggez::nalgebra::Point2::new(0.0, 0.0),
141 0.0).unwrap();
142 self.sprites.clear();
143 }
144 }
105145 }
106146
107147 impl EventHandler for MyGame {
114154 use ggez::nalgebra as n;
115155 g::set_background_color(ctx, g::BLACK);
116156 g::clear(ctx);
117 for layer in [ &self.board.tiles, &self.board.entities, &self.board.decoration ].iter() {
118 for (pt, t) in iproduct!((0..consts::BOARD_HEIGHT),
119 (0..consts::BOARD_WIDTH)).zip(
120 layer.iter()) {
121 if let Some(t) = t {
122 self.sprites.add(t.draw(pt));
123 }
124 }
125 }
157
158 Draw { ctx, sprites: &mut self.sprites, _phase: Background }.run_now(&self.world.res);
159 Draw { ctx, sprites: &mut self.sprites, _phase: Foreground }.run_now(&self.world.res);
160 Draw { ctx, sprites: &mut self.sprites, _phase: Decoration }.run_now(&self.world.res);
161
126162 g::draw(ctx, &self.sprites, n::Point2::new(0.0, 0.0), 0.0)?;
127163 self.sprites.clear();
128164 g::present(ctx);
131167 }
132168
133169 fn main() -> Result<(), ggez::error::GameError> {
170 let mut world = specs::World::new();
171 world.register::<Position>();
172 world.register::<Sprite>();
173 world.register::<Background>();
174 world.register::<Foreground>();
175 world.register::<Decoration>();
176
177 world_from_file(&mut world, &Path::new("assets/main.tmx"));
178
134179 // Make a Context and an EventLoop.
135 let board = Board::from_file(&Path::new("assets/main.tmx"));
136180 let mut ctx = ContextBuilder::new("game", "me")
137181 .add_resource_path({
138182 let base = std::env::var("CARGO_MANIFEST_DIR").unwrap();
145189 let sprites = graphics::spritebatch::SpriteBatch::new(image);
146190
147191 let mut my_game = MyGame {
148 board,
192 world,
149193 sprites,
150194 };
151195