MevLyshkin
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doppler
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Fix frame counter

This commit is contained in:
Piotr Siuszko 2020-09-30 23:16:35 +02:00
parent 3fb9772db2
commit 07c7b4193f
1 changed files with 23 additions and 17 deletions
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40
doppler/src/engine.rs
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@ -17,6 +17,7 @@ pub struct TimeStep {
delta_time: f32,
frame_count: u32,
frame_time: f32,
last_frame_count: u32,
}
impl TimeStep {
@ -26,30 +27,35 @@ impl TimeStep {
delta_time: 0.0,
frame_count: 0,
frame_time: 0.0,
last_frame_count: 42,
}
}
pub fn delta(&mut self) -> f32 {
pub fn update(&mut self) {
// delta
let current_time = Instant::now();
let delta = current_time.duration_since(self.last_time).as_micros() as f32 * 0.001;
self.last_time = current_time;
self.delta_time = delta;
delta
// frame counter
self.frame_count += 1;
self.frame_time += self.delta_time;
// per second
if self.frame_time >= 1000.0 {
self.last_frame_count = self.frame_count;
self.frame_count = 0;
self.frame_time = 0.0;
}
}
pub fn delta(&self) -> f32 {
self.delta_time
}
// provides the framerate in FPS
pub fn frame_rate(&mut self) -> Option<u32> {
self.frame_count += 1;
self.frame_time += self.delta_time;
let tmp;
// per second
if self.frame_time >= 1000.0 {
tmp = self.frame_count;
self.frame_count = 0;
self.frame_time = 0.0;
return Some(tmp);
}
None
pub fn frame_rate(&self) -> u32 {
self.last_frame_count
}
}
@ -202,8 +208,8 @@ impl Engine {
}
}
Event::MainEventsCleared => {
let delta = timestep.delta();
client.update(delta);
timestep.update();
client.update(timestep.delta());
// other application-specific logic
#[cfg(feature = "imgui_inspect")]
platform
@ -283,7 +289,7 @@ impl Engine {
let ui = imgui.frame();
client.debug_draw(&ui);
use imgui::*;
let fps = timestep.frame_rate().unwrap_or(0u32);
let fps = timestep.frame_rate();
let size = [250.0, 110.0];
let offset = 20.0;
Window::new(im_str!("EngineInfo"))