use crate::{Diagnostic, DiagnosticPath, Diagnostics, RegisterDiagnostic};
use bevy_app::prelude::*;
use bevy_core::FrameCount;
use bevy_ecs::prelude::*;
use bevy_time::{Real, Time};
#[derive(Default)]
pub struct FrameTimeDiagnosticsPlugin;
impl Plugin for FrameTimeDiagnosticsPlugin {
fn build(&self, app: &mut bevy_app::App) {
app.register_diagnostic(Diagnostic::new(Self::FRAME_TIME).with_suffix("ms"))
.register_diagnostic(Diagnostic::new(Self::FPS))
.register_diagnostic(Diagnostic::new(Self::FRAME_COUNT).with_smoothing_factor(0.0))
.add_systems(Update, Self::diagnostic_system);
}
}
impl FrameTimeDiagnosticsPlugin {
pub const FPS: DiagnosticPath = DiagnosticPath::const_new("fps");
pub const FRAME_COUNT: DiagnosticPath = DiagnosticPath::const_new("frame_count");
pub const FRAME_TIME: DiagnosticPath = DiagnosticPath::const_new("frame_time");
pub fn diagnostic_system(
mut diagnostics: Diagnostics,
time: Res<Time<Real>>,
frame_count: Res<FrameCount>,
) {
diagnostics.add_measurement(&Self::FRAME_COUNT, || frame_count.0 as f64);
let delta_seconds = time.delta_seconds_f64();
if delta_seconds == 0.0 {
return;
}
diagnostics.add_measurement(&Self::FRAME_TIME, || delta_seconds * 1000.0);
diagnostics.add_measurement(&Self::FPS, || 1.0 / delta_seconds);
}
}