61 lines
1.3 KiB
Rust
61 lines
1.3 KiB
Rust
use osmium::{entity::Component, sleep, terminal};
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fn main() {
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terminal::hide_cursor().unwrap();
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let engine = osmium::init();
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engine.thread("Main.tick", |engine| {
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let mut tick = 0;
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loop {
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if tick == 60000 {
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tick = 0;
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}
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engine.tick(tick);
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tick += 1;
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sleep(4);
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}
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});
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let my_rect = engine.entity(|r| {
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r.draw_rect(0, 0, 1, 2, 0xff0000);
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r.draw_rect(1, 0, 1, 2, 0x00ff00);
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r.draw_rect(2, 0, 1, 2, 0x0000ff);
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});
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my_rect.component(Velocity(300));
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engine.start();
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terminal::show_cursor().unwrap();
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}
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pub struct Velocity(pub i32);
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impl Component for Velocity {
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fn tick(&mut self, entity: &std::sync::Arc<osmium::entity::Entity>, tick: u16) {
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let mut position = entity.position();
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apply_velocity(tick, self.0, &mut position.x);
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}
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}
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fn apply_velocity(tick: u16, velocity: i32, x: &mut u16) -> bool {
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let abs_v = velocity.abs();
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if abs_v == 0 {
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return false;
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}
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let interval = (1000 / abs_v).max(1);
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if tick as i32 % interval == 0 {
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if velocity > 0 {
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*x = x.saturating_add(1);
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} else {
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*x = x.saturating_sub(1);
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}
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return true;
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}
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false
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}
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