79 lines
2.5 KiB
Rust
79 lines
2.5 KiB
Rust
use bevy::prelude::*;
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use crate::{
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domain::{End, SnakePath, Tail},
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observers::{cleanup_snake_path, schedule_set_velocity, tail_observer},
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};
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/// Инициализация игрового мира
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pub fn startup(mut commands: Commands, mut timer: ResMut<Time<Fixed>>) {
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timer.set_timestep_hz(32.0);
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spawn_snake(&mut commands);
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crate::debug::spawn_grid(&mut commands);
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commands.spawn(Camera2d);
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}
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/// Создать голову змеи
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fn spawn_snake(commands: &mut Commands) {
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use crate::domain::{Direction, HEAD_SIZE, Head, Inert, SNAKE_VELOCITY, Velocity};
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commands.insert_resource(SnakePath::default());
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commands.spawn(Observer::new(cleanup_snake_path));
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/*
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commands.spawn(Observer::new(|e: On<GridBarier>| {
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let entity = e.entity;
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let src = e.src_pos;
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let dst = e.dst_pos;
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trace!("...<{entity:?}> moving {src:>16} => {dst:>16}");
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}));
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*/
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let head = commands
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.spawn((
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Head,
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Direction::default(),
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Inert::default(),
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Velocity(SNAKE_VELOCITY as f32),
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Sprite::from_color(Color::srgb(1., 1., 1.), vec2(HEAD_SIZE as f32, HEAD_SIZE as f32)),
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Transform {
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translation: vec3(0.0, 0.0, 1.0),
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..Default::default()
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},
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))
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.id();
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commands.spawn((
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Sprite::from_color(Color::srgb(1., 0., 0.), vec2(HEAD_SIZE as f32 * 0.3, HEAD_SIZE as f32 * 0.3)),
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Transform {
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translation: vec3(HEAD_SIZE as f32 * -0.25, HEAD_SIZE as f32 * 0.25, 1.0),
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..Default::default()
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},
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ChildOf(head),
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));
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commands.spawn((
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Sprite::from_color(Color::srgb(0., 0., 1.), vec2(HEAD_SIZE as f32 * 0.2, HEAD_SIZE as f32 * 0.2)),
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Transform {
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translation: vec3(HEAD_SIZE as f32 * 0.25, HEAD_SIZE as f32 * 0.25, 1.0),
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..Default::default()
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},
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ChildOf(head),
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));
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let tail = commands
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.spawn((
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Tail,
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End,
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Direction::default(),
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Inert::default(),
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Velocity(0.0),
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Sprite::from_color(Color::srgb(0.7, 0.7, 0.7), vec2(HEAD_SIZE as f32 * 0.8, HEAD_SIZE as f32 * 0.8)),
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Transform {
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translation: vec3(0.0, 0.0, 0.0),
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..Default::default()
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},
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Observer::new(tail_observer),
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))
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.id();
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commands.entity(head).observe(schedule_set_velocity(tail));
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}
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