timer.rs

   1 use std::time::{Duration, Instant};
   2
   3 #[cfg(feature = "editor")]
   4 use rust_rocket;
   5
   6 #[cfg(feature = "editor")]
   7 type Rocket = rust_rocket::Rocket;
   8
   9 #[cfg(not(feature = "editor"))]
  10 type Rocket = ();
  11
  12 #[cfg(feature = "editor")]
  13 const BPS: f32 = 10.0;
  14
  15 #[derive(Debug)]
  16 pub struct Timer {
  17     pub t: f32,
  18
  19     frame: u32,
  20
  21     last_report_time: Instant,
  22     last_report_frame: u32,
  23
  24     accum_draw_time: Duration,
  25     accum_idle_time: Duration,
  26
  27     pub pause: bool,
  28
  29     pub rocket: Option<Rocket>,
  30 }
  31
  32 impl Timer {
  33     pub fn new() -> Self {
  34         let now = Instant::now();
  35         Timer {
  36             t: 0.0,
  37             frame: 0,
  38             last_report_time: now,
  39             last_report_frame: 0,
  40             accum_draw_time: Duration::default(),
  41             accum_idle_time: Duration::default(),
  42             pause: false,
  43             rocket: Timer::init_rocket(),
  44         }
  45     }
  46
  47     pub fn update(&mut self) {
  48         let now = Instant::now();
  49         self.poll_rocket();
  50         if !self.pause {
  51             // Increment time
  52             self.t += 0.01;
  53             self.frame += 1;
  54         }
  55         self.maybe_report(now);
  56     }
  57
  58     #[cfg(not(feature = "logging"))]
  59     fn maybe_report(&mut self, _: Instant) {}
  60
  61     #[cfg(feature = "logging")]
  62     fn maybe_report(&mut self, now: Instant) {
  63         if now - self.last_report_time > Duration::from_secs(5) {
  64             self.report(now);
  65             self.last_report_time = now;
  66             self.last_report_frame = self.frame;
  67             self.accum_draw_time = Duration::new(0, 0);
  68             self.accum_idle_time = Duration::new(0, 0);
  69         }
  70     }
  71
  72     #[cfg(feature = "logging")]
  73     fn report(&self, now: Instant) {
  74         fn millis(d : Duration) -> f32 {
  75             d.as_secs() as f32 * 1e3 + d.subsec_nanos() as f32 / 1e6
  76         }
  77         let frames_done = self.frame - self.last_report_frame;
  78         let fps = frames_done as f32 / (now - self.last_report_time).as_secs() as f32;
  79         let avg_draw_time = millis(self.accum_draw_time / frames_done);
  80         let avg_idle_time = millis(self.accum_idle_time / frames_done);
  81         println!("fps={:.1} draw={:.1}ms idle={:.1}ms", fps, avg_draw_time, avg_idle_time);
  82     }
  83
  84     #[cfg(not(feature = "editor"))]
  85     fn init_rocket() -> Option<Rocket> { None }
  86
  87     #[cfg(not(feature = "editor"))]
  88     fn poll_rocket(&mut self) {}
  89
  90     #[cfg(feature = "editor")]
  91     fn init_rocket() -> Option<Rocket> {
  92         Rocket::new().ok()
  93     }
  94
  95     #[cfg(feature = "editor")]
  96     fn poll_rocket(&mut self) {
  97         match self.rocket {
  98             Some(ref mut rocket) => {
  99                 let current_row = (self.t * BPS) as u32;
 100                 if let Some(event) = rocket.poll_events() {
 101                     match event {
 102                         rust_rocket::Event::SetRow(row) => {
 103                             println!("SetRow (row: {:?})", row);
 104                             self.t = row as f32 / BPS;
 105                         }
 106                         rust_rocket::Event::Pause(_) => {
 107                             let track1 = rocket.get_track_mut("test");
 108                             println!("Pause (value: {:?}) (row: {:?})", track1.get_value(current_row as f32), current_row);
 109                         }
 110                         _ => (),
 111                     }
 112                     println!("{:?}", event);
 113                 }
 114             }
 115             None => ()
 116         }
 117     }
 118 }