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Fix game loop order #1527

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Fix game loop order #1527

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13 changes: 10 additions & 3 deletions examples/demo.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -19,10 +19,13 @@ pub fn main() -> Result<(), String> {
let mut canvas = window.into_canvas().build().map_err(|e| e.to_string())?;

canvas.set_draw_color(Color::RGB(255, 0, 0));
canvas.clear();
canvas.present();

let mut event_pump = sdl_context.event_pump()?;

// Present an initial frame before entering the main loop
canvas.clear();
canvas.present();

'running: loop {
for event in event_pump.poll_iter() {
match event {
Expand All @@ -34,11 +37,15 @@ pub fn main() -> Result<(), String> {
_ => {}
}
}

/*
This is where the game loop should happen.
Updating and rendering last we prevent any delay.
*/

canvas.clear();
canvas.present();
::std::thread::sleep(Duration::new(0, 1_000_000_000u32 / 30));
// The rest of the game loop goes here...
}

Ok(())
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