add fps printer system to diagnostics mod

examples/instancing.rs

@@ -1,6 +1,5 @@
 use bevy::prelude::*;
 use rand::{random, rngs::StdRng, Rng, SeedableRng};
-use std::collections::VecDeque;
 
 struct Person;
 
@@ -25,7 +24,7 @@ fn main() {
         .add_system(build_wander_system())
         .add_system(build_navigate_system())
         .add_system(build_move_system())
-        .add_system(build_print_status_system())
+        .add_system(bevy::diagnostics::build_fps_printer_system())
         .run();
 }
 
@@ -141,37 +140,6 @@ fn build_move_system() -> Box<dyn Schedulable> {
         })
 }
 
-fn build_print_status_system() -> Box<dyn Schedulable> {
-    let mut elapsed = 0.0;
-    let mut frame_time_total = 0.0;
-    let mut frame_time_count = 0;
-    let frame_time_max = 10;
-    let mut frame_time_values = VecDeque::new();
-    SystemBuilder::new("PrintStatus")
-        .read_resource::<Time>()
-        .with_query(<(Read<Person>,)>::query())
-        .build(move |_, world, time, person_query| {
-            elapsed += time.delta_seconds;
-            frame_time_values.push_front(time.delta_seconds);
-            frame_time_total += time.delta_seconds;
-            frame_time_count += 1;
-            if frame_time_count > frame_time_max {
-                frame_time_count = frame_time_max;
-                frame_time_total -= frame_time_values.pop_back().unwrap();
-            }
-            if elapsed > 1.0 {
-                if frame_time_count > 0 && frame_time_total > 0.0 {
-                    println!(
-                        "fps: {}",
-                        1.0 / (frame_time_total / frame_time_count as f32)
-                    )
-                }
-                println!("peeps: {}", person_query.iter(world).count());
-                elapsed = 0.0;
-            }
-        })
-}
-
 fn create_person(world: &mut World, mesh_handle: Handle<Mesh>, translation: Translation) {
     world.insert(
         (),

examples/spawner.rs

@@ -1,12 +1,11 @@
 use bevy::prelude::*;
 use rand::{rngs::StdRng, Rng, SeedableRng};
-use std::collections::VecDeque;
 
 fn main() {
     AppBuilder::new()
         .add_defaults()
         .add_system(build_move_system())
-        .add_system(build_print_status_system())
+        .add_system(bevy::diagnostics::build_fps_printer_system())
         .setup_world(setup)
         .run();
 }
@@ -27,35 +26,6 @@ fn build_move_system() -> Box<dyn Schedulable> {
         })
 }
 
-fn build_print_status_system() -> Box<dyn Schedulable> {
-    let mut elapsed = 0.0;
-    let mut frame_time_total = 0.0;
-    let mut frame_time_count = 0;
-    let frame_time_max = 10;
-    let mut frame_time_values = VecDeque::new();
-    SystemBuilder::new("PrintStatus")
-        .read_resource::<Time>()
-        .build(move |_, _world, time, _queries| {
-            elapsed += time.delta_seconds;
-            frame_time_values.push_front(time.delta_seconds);
-            frame_time_total += time.delta_seconds;
-            frame_time_count += 1;
-            if frame_time_count > frame_time_max {
-                frame_time_count = frame_time_max;
-                frame_time_total -= frame_time_values.pop_back().unwrap();
-            }
-            if elapsed > 1.0 {
-                if frame_time_count > 0 && frame_time_total > 0.0 {
-                    println!(
-                        "fps: {}",
-                        1.0 / (frame_time_total / frame_time_count as f32)
-                    )
-                }
-                elapsed = 0.0;
-            }
-        })
-}
-
 fn setup(world: &mut World, resources: &mut Resources) {
     let mut mesh_storage = resources.get_mut::<AssetStorage<Mesh>>().unwrap();
     let cube_handle = mesh_storage.add(Mesh::load(MeshType::Cube));

src/diagnostics/mod.rs

@@ -0,0 +1,32 @@
+use crate::{core::Time, prelude::SystemBuilder};
+use legion::prelude::Schedulable;
+use std::collections::VecDeque;
+
+pub fn build_fps_printer_system() -> Box<dyn Schedulable> {
+    let mut elapsed = 0.0;
+    let mut frame_time_total = 0.0;
+    let mut frame_time_count = 0;
+    let frame_time_max = 10;
+    let mut frame_time_values = VecDeque::new();
+    SystemBuilder::new("FpsPrinter")
+        .read_resource::<Time>()
+        .build(move |_, _world, time, _queries| {
+            elapsed += time.delta_seconds;
+            frame_time_values.push_front(time.delta_seconds);
+            frame_time_total += time.delta_seconds;
+            frame_time_count += 1;
+            if frame_time_count > frame_time_max {
+                frame_time_count = frame_time_max;
+                frame_time_total -= frame_time_values.pop_back().unwrap();
+            }
+            if elapsed > 1.0 {
+                if frame_time_count > 0 && frame_time_total > 0.0 {
+                    println!(
+                        "fps: {}",
+                        1.0 / (frame_time_total / frame_time_count as f32)
+                    )
+                }
+                elapsed = 0.0;
+            }
+        })
+}

src/lib.rs

@@ -8,6 +8,7 @@ pub mod prelude;
 pub mod render;
 pub mod serialization;
 pub mod ui;
+pub mod diagnostics;
 
 pub use bevy_transform as transform;
 pub use glam as math;

src/ui/anchors.rs

@@ -1,3 +1,4 @@
+#[derive(Debug, Clone)]
 pub struct Anchors {
     pub left: f32,
     pub right: f32,

src/ui/margins.rs

@@ -1,3 +1,4 @@
+#[derive(Debug, Clone)]
 pub struct Margins {
     pub left: f32,
     pub right: f32,

src/ui/node.rs

@@ -5,11 +5,13 @@ use crate::{
     ui::{Anchors, Margins},
 };
 
+#[derive(Debug, Clone)]
 enum GrowDirection {
     Negative,
     Positive,
 }
 
+#[derive(Debug, Clone)]
 pub struct Node {
     pub position: Vec2,
     pub global_position: Vec2,