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- #[macro_use]
- extern crate specs_derive;
- #[macro_use]
- extern crate specs_system_macro;
- use ggez::{event::EventHandler, Context, GameError};
- use specs::prelude::*;
- #[derive(Component)]
- pub struct Pos {
- x: usize,
- y: usize,
- }
- #[derive(Component)]
- pub struct Renderable {
- glyph: carpet::CP437,
- color: carpet::Color,
- }
- system_impl! {
- Draw(
- resource mut board: carpet::Board<carpet::CP437>,
- renderable: Renderable,
- pos: Pos,
- ) {
- board.clear();
- for (p, r) in (&pos, &renderable).join() {
- board.set_with_color([p.x, p.y], r.glyph, r.color);
- }
- }
- }
- #[derive(Component)]
- pub struct MoveLeft;
- system! {
- Leftward (
- _left: MoveLeft,
- mut pos: Pos,
- ) {
- if pos.x == 0 {
- pos.x = 79;
- } else {
- pos.x -= 1;
- }
- }
- }
- struct State {
- world: World,
- }
- impl EventHandler for State {
- fn draw(&mut self, ctx: &mut Context) -> Result<(), GameError> {
- ggez::graphics::clear(ctx, ggez::graphics::BLACK);
- self.world.fetch::<carpet::Board<carpet::CP437>>().draw(ctx)?;
- ggez::graphics::present(ctx)
- }
- fn update(&mut self, _ctx: &mut Context) -> Result<(), GameError> {
- Ok(())
- }
- }
- fn main() -> Result<(), GameError> {
- let mut game = carpet::GameBuilder::new()
- .name("game")
- .author("me")
- .resource_path({
- let base = std::env::var("CARGO_MANIFEST_DIR").unwrap();
- let mut path = std::path::PathBuf::from(base);
- path.push("resources");
- path
- })
- .tileset("/terminal8x8.jpg", [8, 8])
- .map_size(80, 50)
- .build()?;
- game.register::<Pos>();
- game.register::<Renderable>();
- game.register::<MoveLeft>();
- game.world.print([1, 1], "Hello, world!");
- game.create_entity()
- .with(Pos { x: 40, y: 25 })
- .with(Renderable {
- glyph: carpet::CP437::from_char('A'),
- color: carpet::Color::Blue,
- })
- .build();
- for i in 0..10 {
- game.create_entity()
- .with(Pos { x: i * 7, y: 20 })
- .with(Renderable {
- glyph: carpet::CP437::from_char('X'),
- color: carpet::Color::Red,
- })
- .with(MoveLeft)
- .build();
- }
- game.run_with_systems(|world| {
- Draw.run_now(&world);
- Leftward.run_now(&world);
- })
- }
- // Local Variables:
- // cargo-process--command-build: "build --release"
- // cargo-process--command-run: "run --release --bin ch2"
- // End:
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