feat(core/game_loop): initial implementation

Author: IogaMaster

src/core/game_loop.rs

@@ -0,0 +1,19 @@
+use std::time::{Duration, Instant};
+
+pub fn game_loop<T: FnMut(), F: FnMut(f32)>(ticks_per_second: &f32, mut tick: T, mut frame: F) {
+    let mut tick_delta = 1.0 / ticks_per_second;
+    let mut tick_timer = Instant::now();
+
+    let mut delta_time = 0.0;
+
+    loop {
+        let frame_timer = Instant::now();
+        if tick_timer.elapsed().as_secs_f32() > tick_delta {
+            tick();
+            tick_delta = 1.0 / ticks_per_second;
+            tick_timer = Instant::now();
+        }
+        frame(delta_time);
+        delta_time = frame_timer.elapsed().as_secs_f32();
+    }
+}

src/core/mod.rs

@@ -0,0 +1 @@
+pub mod game_loop;

src/main.rs

@@ -1,12 +1,18 @@
+mod core;
 mod modules;
-use crate::modules::*;
+use std::{io::Write, thread::sleep};
+
+use crate::{core::game_loop::game_loop, modules::*};
 use mlua::prelude::*;
 use simplelog::*;
 use std::{fs::File, path::Path};
 
 fn main() -> LuaResult<()> {
     let lua = init();
     lua.load(Path::new("main.lua")).exec()?;
+
+    game_loop(&60.0, || {}, |dt| {});
+
     Ok(())
 }