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https://github.com/bevyengine/bevy
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320ac65a9e
# Objective Implements #9216 ## Solution - Replace `DiagnosticId` by `DiagnosticPath`. It's pre-hashed using `const-fnv1a-hash` crate, so it's possible to create path in const contexts. --- ## Changelog - Replaced `DiagnosticId` by `DiagnosticPath` - Set default history length to 120 measurements (2 seconds on 60 fps). I've noticed hardcoded constant 20 everywhere and decided to change it to `DEFAULT_MAX_HISTORY_LENGTH` , which is set to new diagnostics by default. To override it, use `with_max_history_length`. ## Migration Guide ```diff - const UNIQUE_DIAG_ID: DiagnosticId = DiagnosticId::from_u128(42); + const UNIQUE_DIAG_PATH: DiagnosticPath = DiagnosticPath::const_new("foo/bar"); - Diagnostic::new(UNIQUE_DIAG_ID, "example", 10) + Diagnostic::new(UNIQUE_DIAG_PATH).with_max_history_length(10) - diagnostics.add_measurement(UNIQUE_DIAG_ID, || 42); + diagnostics.add_measurement(&UNIQUE_DIAG_ID, || 42); ```
31 lines
1 KiB
Rust
31 lines
1 KiB
Rust
//! This example illustrates how to create a custom diagnostic.
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use bevy::{
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diagnostic::{
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Diagnostic, DiagnosticPath, Diagnostics, LogDiagnosticsPlugin, RegisterDiagnostic,
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},
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prelude::*,
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};
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fn main() {
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App::new()
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.add_plugins((
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DefaultPlugins,
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// The "print diagnostics" plugin is optional.
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// It just visualizes our diagnostics in the console.
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LogDiagnosticsPlugin::default(),
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))
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// Diagnostics must be initialized before measurements can be added.
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.register_diagnostic(Diagnostic::new(SYSTEM_ITERATION_COUNT).with_suffix(" iterations"))
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.add_systems(Update, my_system)
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.run();
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}
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// All diagnostics should have a unique DiagnosticPath.
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pub const SYSTEM_ITERATION_COUNT: DiagnosticPath =
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DiagnosticPath::const_new("system_iteration_count");
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fn my_system(mut diagnostics: Diagnostics) {
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// Add a measurement of 10.0 for our diagnostic each time this system runs.
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diagnostics.add_measurement(&SYSTEM_ITERATION_COUNT, || 10.0);
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}
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