git.iko.soy/dodrio
on master help sign in
example: Add Sierpinski sieve
commit3fde219463fed8e1bda81b13669af2c11f6d7925 authorSteven Seguin <steven.seguin@gmail.com> dateFri 15 Mar 2019, 17:10 (8 years ago) parent9e2e4cb
7 files changed+389−76
compare with master
unifiedsplit
Cargo.lock+91−76 Cargo.toml+1 examples/sierpinski-triangle/Cargo.toml+29 examples/sierpinski-triangle/README.md+24 examples/sierpinski-triangle/ferris.png examples/sierpinski-triangle/index.html+69 examples/sierpinski-triangle/src/lib.rs+175
Cargo.lock+91−76
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668683"checksum log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c84ec4b527950aa83a329754b01dbe3f58361d1c5efacd1f6d68c494d08a17c6"
@@ -692,16 +707,16 @@ dependencies = [
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694709"checksum version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
695−"checksum wasm-bindgen 0.2.38 (registry+https://github.com/rust-lang/crates.io-index)" = "f7148f7446b911dd8e8d490a4fd44bf7fcd6caa21ba2fed9aef7bf34b9a974d4"
696−"checksum wasm-bindgen-backend 0.2.38 (registry+https://github.com/rust-lang/crates.io-index)" = "07b7b7e0a5c244e02469d7ad0f071dca0a01a7be217db41e4de5e05d4a1ab2ac"
697−"checksum wasm-bindgen-futures 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "ad790bdb3818ba6fba63d3a3fd65ab52ca7f601cad1c6c1feda66199b4e9f161"
698−"checksum wasm-bindgen-macro 0.2.38 (registry+https://github.com/rust-lang/crates.io-index)" = "e51818f0ab6cdef85125d2c2f1a89096370286fe229d24de89504617918d76af"
699−"checksum wasm-bindgen-macro-support 0.2.38 (registry+https://github.com/rust-lang/crates.io-index)" = "4770fd638bed46ce4669cb59aba4657e264839c24c568cc03d772849bfaed7eb"
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Cargo.toml+1
@@ -64,5 +64,6 @@ members = [
6464 "./examples/input-form",
6565 "./examples/js-component",
6666 "./examples/moire",
67+ "./examples/sierpinski-triangle",
6768 "./examples/todomvc",
6869]
examples/sierpinski-triangle/Cargo.tomlnew file+29
@@ -0,0 +1,29 @@
1+[package]
2+name = "dodrio-sierpinski"
3+version = "0.1.0"
4+authors = ["Steven Seguin <steven.seguin@gmail.com>"]
5+edition = "2018"
6+
7+[lib]
8+crate-type = ["cdylib"]
9+
10+[dependencies]
11+dodrio = { path = "../.." }
12+wasm-bindgen = "0.2.39"
13+console_error_panic_hook = "0.1.6"
14+js-sys = "0.3.16"
15+wasm-bindgen-futures = "0.3.16"
16+futures = "0.1.25"
17+
18+[dependencies.web-sys]
19+version = "0.3.16"
20+features = [
21+ "Document",
22+ "HtmlElement",
23+ "Node",
24+ "Performance",
25+ "Window",
26+]
27+
28+[dev-dependencies]
29+wasm-bindgen-test = "0.2.39"
examples/sierpinski-triangle/README.mdnew file+24
@@ -0,0 +1,24 @@
1+# Sierpinski Triangle
2+
3+A Sierpinkski triangle that constantly shrinks and grows, and whose nodes have
4+a value that increments by one every second.
5+
6+Ported from the React Fiber example [here](https://github.com/claudiopro/react-fiber-vs-stack-demo).
7+
8+## Source
9+
10+See `src/lib.rs`.
11+
12+## Build
13+
14+```
15+wasm-pack build --target no-modules
16+```
17+
18+## Serve
19+
20+Use any HTTP server, for example:
21+
22+```
23+python -m http.server
24+```
examples/sierpinski-triangle/ferris.pngnew file

Binary file not shown.

examples/sierpinski-triangle/index.htmlnew file+69
@@ -0,0 +1,69 @@
1+<!DOCTYPE html>
2+<html>
3+
4+<head>
5+ <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
6+ <title>Sierpinski Triangle</title>
7+ <style>
8+ .container {
9+ position: absolute;
10+ transform-origin: 0 0;
11+ left: 50%;
12+ top: 50%;
13+ width: 10px;
14+ height: 10px;
15+ background: #eee;
16+ }
17+
18+ .dot {
19+ position: absolute;
20+ background: #61dafb;
21+ font: normal 15px sans-serif;
22+ text-align: center;
23+ cursor: pointer;
24+ }
25+
26+ .dot:hover {
27+ background: url("ferris.png") no-repeat center center;
28+ z-index: 999;
29+ }
30+
31+ code {
32+ position: relative;
33+ font-size: 150%;
34+ }
35+ </style>
36+</head>
37+
38+<body>
39+ <code>FPS: <output id="fps">...</output></code>
40+ <div id="scene"></div>
41+
42+ <script src="pkg/dodrio_sierpinski.js"></script>
43+ <script>
44+ wasm_bindgen("pkg/dodrio_sierpinski_bg.wasm");
45+ </script>
46+
47+ <script>
48+ let lastTime = 0;
49+ let frameCount = 0;
50+ const fps = document.getElementById('fps');
51+
52+ function updateFPS(time) {
53+ frameCount++;
54+ if (lastTime + 1000.0 <= time) {
55+ fps.textContent = frameCount;
56+ lastTime = time;
57+ frameCount = 0;
58+ }
59+ }
60+
61+ requestAnimationFrame(function loop(now) {
62+ updateFPS(now);
63+ requestAnimationFrame(loop);
64+ })
65+
66+ </script>
67+</body>
68+
69+</html>
examples/sierpinski-triangle/src/lib.rsnew file+175
@@ -0,0 +1,175 @@
1+use std::cell::RefCell;
2+use std::rc::Rc;
3+
4+use dodrio::bumpalo::{self, Bump};
5+use dodrio::{Node, Render, Vdom};
6+use wasm_bindgen::prelude::*;
7+use wasm_bindgen::JsCast;
8+use web_sys::Window;
9+
10+// Triangle container defining target size
11+struct Container {
12+ size: f64,
13+}
14+
15+impl Container {
16+ // Construct a new container
17+ pub fn new() -> Container {
18+ Container { size: 25.0 }
19+ }
20+
21+ // Generate the container style to fluctuate triangle width
22+ fn container_transform<'a, 'bump>(&'a self, bump: &'bump Bump, elapsed: f64) -> &'bump str
23+ where
24+ 'a: 'bump,
25+ {
26+ let t = elapsed % 10.0;
27+ let scale = 0.45 + (if t > 5.0 { 10.0 - t } else { t }) / 40.0;
28+ let transform = bumpalo::format!(
29+ in bump,
30+ "transform: scaleX({}) scaleY(0.7) translateZ(0.1px)",
31+ scale
32+ );
33+ transform.into_bump_str()
34+ }
35+
36+ // Generate the dot's position on the grid
37+ fn dot_style<'a, 'bump>(&'a self, bump: &'bump Bump, x: f64, y: f64) -> &'bump str
38+ where
39+ 'a: 'bump,
40+ {
41+ let s = self.size * 1.3;
42+ let radius = s / 2.0;
43+ let styles = bumpalo::format!(
44+ in bump,
45+ r#"
46+ width: {}px;
47+ height: {}px;
48+ left: {}px;
49+ top: {}px;
50+ border-radius: {}px;
51+ line-height: {}px;
52+ "#,
53+ s, s, x, y, radius, s
54+ );
55+ styles.into_bump_str()
56+ }
57+
58+ // Create a dot node
59+ fn dot<'a, 'bump>(&'a self, bump: &'bump Bump, x: f64, y: f64, content: u32) -> Node<'bump>
60+ where
61+ 'a: 'bump,
62+ {
63+ use dodrio::builder::{div, text};
64+
65+ div(bump)
66+ .attr("class", "dot")
67+ .attr("style", self.dot_style(bump, x, y))
68+ .child(text(
69+ bumpalo::format!(in bump, "{}", content).into_bump_str(),
70+ ))
71+ .finish()
72+ }
73+
74+ // Create a flattened vector of dot nodes (arranged in recursive triangles)
75+ fn triangle<'a, 'bump>(
76+ &'a self,
77+ bump: &'bump Bump,
78+ x: f64,
79+ y: f64,
80+ s: f64,
81+ content: u32,
82+ ) -> Vec<Node<'bump>>
83+ where
84+ 'a: 'bump,
85+ {
86+ if s <= self.size {
87+ return vec![self.dot(bump, x, y, content)];
88+ }
89+
90+ let s = s / 2.0;
91+
92+ vec![
93+ // Top of triangle
94+ self.triangle(bump, x, y - (s / 2.0), s, content),
95+ // Bottom-left of triangle
96+ self.triangle(bump, x - s, y + (s / 2.0), s, content),
97+ // Bottom-right of triangle
98+ self.triangle(bump, x + s, y + (s / 2.0), s, content),
99+ ]
100+ .into_iter()
101+ .flatten()
102+ .collect()
103+ }
104+}
105+
106+impl Render for Container {
107+ fn render<'a, 'bump>(&'a self, bump: &'bump Bump) -> Node<'bump>
108+ where
109+ 'a: 'bump,
110+ {
111+ use dodrio::builder::div;
112+
113+ let elapsed = web_sys::window()
114+ .unwrap_throw()
115+ .performance()
116+ .unwrap_throw()
117+ .now()
118+ / 1000.0;
119+
120+ let modulus = elapsed as u32 % 10;
121+
122+ div(bump)
123+ .attr("class", "container")
124+ .attr("style", self.container_transform(bump, elapsed))
125+ .children(self.triangle(bump, 0.0, 0.0, 1000.0, modulus))
126+ .finish()
127+ }
128+}
129+
130+// Kick off a loop that keeps re-rendering on every animation frame.
131+fn animate(window: Window, vdom: Vdom) {
132+ let rc: Rc<RefCell<Option<Closure<FnMut()>>>> = Rc::new(RefCell::new(None));
133+ let rc2 = rc.clone();
134+ let window2 = window.clone();
135+ let weak = vdom.weak();
136+ let f = Closure::wrap(Box::new(move || {
137+ weak.schedule_render();
138+ window
139+ .request_animation_frame(
140+ rc.borrow()
141+ .as_ref()
142+ .unwrap_throw()
143+ .as_ref()
144+ .unchecked_ref::<js_sys::Function>(),
145+ )
146+ .unwrap_throw();
147+ }) as Box<FnMut()>);
148+ window2
149+ .request_animation_frame(f.as_ref().unchecked_ref::<js_sys::Function>())
150+ .unwrap_throw();
151+ *rc2.borrow_mut() = Some(f);
152+
153+ // Run the virtual DOM and its listeners forever.
154+ vdom.forget();
155+}
156+
157+#[wasm_bindgen(start)]
158+pub fn run() {
159+ // Set up the panic hook
160+ console_error_panic_hook::set_once();
161+
162+ // Get the scene element to render within
163+ let window = web_sys::window().unwrap();
164+ let document = window.document().unwrap();
165+ let scene = document.get_element_by_id("scene").unwrap();
166+
167+ // Construct a new Container component.
168+ let container = Container::new();
169+
170+ // Mount our container component to the scene div.
171+ let vdom = Vdom::new(&scene, container);
172+
173+ // Kick off animation loop
174+ animate(window, vdom);
175+}