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-rw-r--r--examples/solar_system/src/main.rs227
1 files changed, 97 insertions, 130 deletions
diff --git a/examples/solar_system/src/main.rs b/examples/solar_system/src/main.rs
index 4c239806..6a2de736 100644
--- a/examples/solar_system/src/main.rs
+++ b/examples/solar_system/src/main.rs
@@ -7,13 +7,14 @@
//!
//! [1]: https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Basic_animations#An_animated_solar_system
use iced::{
- canvas, executor, Application, Canvas, Color, Command, Container, Element,
- Length, Point, Settings, Size, Subscription, Vector,
+ canvas::{self, Cursor, Path, Stroke},
+ executor, time, window, Application, Canvas, Color, Command, Element,
+ Length, Point, Rectangle, Settings, Size, Subscription, Vector,
};
use std::time::Instant;
-pub fn main() {
+pub fn main() -> iced::Result {
SolarSystem::run(Settings {
antialiasing: true,
..Settings::default()
@@ -22,7 +23,6 @@ pub fn main() {
struct SolarSystem {
state: State,
- solar_system: canvas::layer::Cache<State>,
}
#[derive(Debug, Clone, Copy)]
@@ -33,12 +33,12 @@ enum Message {
impl Application for SolarSystem {
type Executor = executor::Default;
type Message = Message;
+ type Flags = ();
- fn new() -> (Self, Command<Message>) {
+ fn new(_flags: ()) -> (Self, Command<Message>) {
(
SolarSystem {
state: State::new(),
- solar_system: canvas::layer::Cache::new(),
},
Command::none(),
)
@@ -52,7 +52,6 @@ impl Application for SolarSystem {
match message {
Message::Tick(instant) => {
self.state.update(instant);
- self.solar_system.clear();
}
}
@@ -65,24 +64,20 @@ impl Application for SolarSystem {
}
fn view(&mut self) -> Element<Message> {
- let canvas = Canvas::new()
+ Canvas::new(&mut self.state)
.width(Length::Fill)
.height(Length::Fill)
- .push(self.solar_system.with(&self.state));
-
- Container::new(canvas)
- .width(Length::Fill)
- .height(Length::Fill)
- .center_x()
- .center_y()
.into()
}
}
#[derive(Debug)]
struct State {
+ space_cache: canvas::Cache,
+ system_cache: canvas::Cache,
+ cursor_position: Point,
start: Instant,
- current: Instant,
+ now: Instant,
stars: Vec<(Point, f32)>,
}
@@ -95,153 +90,125 @@ impl State {
pub fn new() -> State {
let now = Instant::now();
- let (width, height) = Settings::default().window.size;
+ let (width, height) = window::Settings::default().size;
State {
+ space_cache: Default::default(),
+ system_cache: Default::default(),
+ cursor_position: Point::ORIGIN,
start: now,
- current: now,
- stars: {
- use rand::Rng;
-
- let mut rng = rand::thread_rng();
-
- (0..100)
- .map(|_| {
- (
- Point::new(
- rng.gen_range(0.0, width as f32),
- rng.gen_range(0.0, height as f32),
- ),
- rng.gen_range(0.5, 1.0),
- )
- })
- .collect()
- },
+ now,
+ stars: Self::generate_stars(width, height),
}
}
pub fn update(&mut self, now: Instant) {
- self.current = now;
+ self.now = now;
+ self.system_cache.clear();
+ }
+
+ fn generate_stars(width: u32, height: u32) -> Vec<(Point, f32)> {
+ use rand::Rng;
+
+ let mut rng = rand::thread_rng();
+
+ (0..100)
+ .map(|_| {
+ (
+ Point::new(
+ rng.gen_range(
+ -(width as f32) / 2.0,
+ width as f32 / 2.0,
+ ),
+ rng.gen_range(
+ -(height as f32) / 2.0,
+ height as f32 / 2.0,
+ ),
+ ),
+ rng.gen_range(0.5, 1.0),
+ )
+ })
+ .collect()
}
}
-impl canvas::Drawable for State {
- fn draw(&self, frame: &mut canvas::Frame) {
- use canvas::{Fill, Path, Stroke};
+impl<Message> canvas::Program<Message> for State {
+ fn draw(
+ &self,
+ bounds: Rectangle,
+ _cursor: Cursor,
+ ) -> Vec<canvas::Geometry> {
use std::f32::consts::PI;
- let center = frame.center();
+ let background = self.space_cache.draw(bounds.size(), |frame| {
+ let space = Path::rectangle(Point::new(0.0, 0.0), frame.size());
- let space = Path::new(|path| {
- path.rectangle(Point::new(0.0, 0.0), frame.size())
- });
+ let stars = Path::new(|path| {
+ for (p, size) in &self.stars {
+ path.rectangle(*p, Size::new(*size, *size));
+ }
+ });
- let stars = Path::new(|path| {
- for (p, size) in &self.stars {
- path.rectangle(*p, Size::new(*size, *size));
- }
+ frame.fill(&space, Color::BLACK);
+
+ frame.translate(frame.center() - Point::ORIGIN);
+ frame.fill(&stars, Color::WHITE);
});
- let sun = Path::new(|path| path.circle(center, Self::SUN_RADIUS));
- let orbit = Path::new(|path| path.circle(center, Self::ORBIT_RADIUS));
-
- frame.fill(&space, Fill::Color(Color::BLACK));
- frame.fill(&stars, Fill::Color(Color::WHITE));
- frame.fill(&sun, Fill::Color(Color::from_rgb8(0xF9, 0xD7, 0x1C)));
- frame.stroke(
- &orbit,
- Stroke {
- width: 1.0,
- color: Color::from_rgba8(0, 153, 255, 0.1),
- ..Stroke::default()
- },
- );
+ let system = self.system_cache.draw(bounds.size(), |frame| {
+ let center = frame.center();
- let elapsed = self.current - self.start;
- let elapsed_seconds = elapsed.as_secs() as f32;
- let elapsed_millis = elapsed.subsec_millis() as f32;
+ let sun = Path::circle(center, Self::SUN_RADIUS);
+ let orbit = Path::circle(center, Self::ORBIT_RADIUS);
- frame.with_save(|frame| {
- frame.translate(Vector::new(center.x, center.y));
- frame.rotate(
- (2.0 * PI / 60.0) * elapsed_seconds
- + (2.0 * PI / 60_000.0) * elapsed_millis,
+ frame.fill(&sun, Color::from_rgb8(0xF9, 0xD7, 0x1C));
+ frame.stroke(
+ &orbit,
+ Stroke {
+ width: 1.0,
+ color: Color::from_rgba8(0, 153, 255, 0.1),
+ ..Stroke::default()
+ },
);
- frame.translate(Vector::new(Self::ORBIT_RADIUS, 0.0));
- let earth = Path::new(|path| {
- path.circle(Point::ORIGIN, Self::EARTH_RADIUS)
- });
+ let elapsed = self.now - self.start;
+ let rotation = (2.0 * PI / 60.0) * elapsed.as_secs() as f32
+ + (2.0 * PI / 60_000.0) * elapsed.subsec_millis() as f32;
- let shadow = Path::new(|path| {
- path.rectangle(
+ frame.with_save(|frame| {
+ frame.translate(Vector::new(center.x, center.y));
+ frame.rotate(rotation);
+ frame.translate(Vector::new(Self::ORBIT_RADIUS, 0.0));
+
+ let earth = Path::circle(Point::ORIGIN, Self::EARTH_RADIUS);
+ let shadow = Path::rectangle(
Point::new(0.0, -Self::EARTH_RADIUS),
Size::new(
Self::EARTH_RADIUS * 4.0,
Self::EARTH_RADIUS * 2.0,
),
- )
- });
+ );
- frame.fill(&earth, Fill::Color(Color::from_rgb8(0x6B, 0x93, 0xD6)));
+ frame.fill(&earth, Color::from_rgb8(0x6B, 0x93, 0xD6));
- frame.with_save(|frame| {
- frame.rotate(
- ((2.0 * PI) / 6.0) * elapsed_seconds
- + ((2.0 * PI) / 6_000.0) * elapsed_millis,
- );
- frame.translate(Vector::new(0.0, Self::MOON_DISTANCE));
+ frame.with_save(|frame| {
+ frame.rotate(rotation * 10.0);
+ frame.translate(Vector::new(0.0, Self::MOON_DISTANCE));
- let moon = Path::new(|path| {
- path.circle(Point::ORIGIN, Self::MOON_RADIUS)
+ let moon = Path::circle(Point::ORIGIN, Self::MOON_RADIUS);
+ frame.fill(&moon, Color::WHITE);
});
- frame.fill(&moon, Fill::Color(Color::WHITE));
+ frame.fill(
+ &shadow,
+ Color {
+ a: 0.7,
+ ..Color::BLACK
+ },
+ );
});
-
- frame.fill(
- &shadow,
- Fill::Color(Color {
- a: 0.7,
- ..Color::BLACK
- }),
- );
});
- }
-}
-
-mod time {
- use iced::futures;
- use std::time::Instant;
- pub fn every(duration: std::time::Duration) -> iced::Subscription<Instant> {
- iced::Subscription::from_recipe(Every(duration))
- }
-
- struct Every(std::time::Duration);
-
- impl<H, I> iced_native::subscription::Recipe<H, I> for Every
- where
- H: std::hash::Hasher,
- {
- type Output = Instant;
-
- fn hash(&self, state: &mut H) {
- use std::hash::Hash;
-
- std::any::TypeId::of::<Self>().hash(state);
- self.0.hash(state);
- }
-
- fn stream(
- self: Box<Self>,
- _input: futures::stream::BoxStream<'static, I>,
- ) -> futures::stream::BoxStream<'static, Self::Output> {
- use futures::stream::StreamExt;
-
- async_std::stream::interval(self.0)
- .map(|_| Instant::now())
- .boxed()
- }
+ vec![background, system]
}
}
generated by cgit (git 2.34.1) at 2025-05-03 14:33:26 +0000