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frame_time_diagnostics_plugin.rs
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frame_time_diagnostics_plugin.rs
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use crate::{Diagnostic, DiagnosticId, Diagnostics};
use bevy_app::prelude::*;
use bevy_core::FrameCount;
use bevy_ecs::system::{Res, ResMut};
use bevy_time::Time;
/// Adds "frame time" diagnostic to an App, specifically "frame time", "fps" and "frame count"
#[derive(Default)]
pub struct FrameTimeDiagnosticsPlugin;
impl Plugin for FrameTimeDiagnosticsPlugin {
fn build(&self, app: &mut bevy_app::App) {
app.add_startup_system(Self::setup_system)
.add_system(Self::diagnostic_system);
}
}
impl FrameTimeDiagnosticsPlugin {
pub const FPS: DiagnosticId = DiagnosticId::from_u128(288146834822086093791974408528866909483);
pub const FRAME_COUNT: DiagnosticId =
DiagnosticId::from_u128(54021991829115352065418785002088010277);
pub const FRAME_TIME: DiagnosticId =
DiagnosticId::from_u128(73441630925388532774622109383099159699);
pub fn setup_system(mut diagnostics: ResMut<Diagnostics>) {
diagnostics.add(Diagnostic::new(Self::FRAME_TIME, "frame_time", 20).with_suffix("ms"));
diagnostics.add(Diagnostic::new(Self::FPS, "fps", 20));
diagnostics.add(Diagnostic::new(Self::FRAME_COUNT, "frame_count", 1));
}
pub fn diagnostic_system(
mut diagnostics: ResMut<Diagnostics>,
time: Res<Time>,
frame_count: Res<FrameCount>,
) {
diagnostics.add_measurement(Self::FRAME_COUNT, || frame_count.0 as f64);
if time.delta_seconds_f64() == 0.0 {
return;
}
diagnostics.add_measurement(Self::FRAME_TIME, || time.delta_seconds_f64() * 1000.);
diagnostics.add_measurement(Self::FPS, || 1.0 / time.delta_seconds_f64());
}
}