Thread engine

examples/cube.rs

@@ -1,14 +1,21 @@
-use osmium::terminal;
+use osmium::{sleep, terminal};
 
 fn main() {
     terminal::hide_cursor().unwrap();
 
-    let mut engine = osmium::init();
+    let engine = osmium::init();
 
-    engine.thread("Main.tick", || {});
+    engine.thread("Main.tick", |engine| {
+        loop {
+            engine.tick();
+            sleep(4);
+        }
+    });
 
     let my_rect = engine.entity(|r| {
-        r.draw_rect(0, 0, 2, 1, 0x0000ff);
+        r.draw_rect(0, 0, 1, 2, 0xff0000);
+        r.draw_rect(1, 0, 1, 2, 0x00ff00);
+        r.draw_rect(2, 0, 1, 2, 0x0000ff);
     });
 
     engine.start();