beneth
/
wasm_game_of_life
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Update Game of life to allow changing Cell from JS

master
Benoît 2020-06-10 19:11:26 +02:00
parent 8547bdc4c2
commit 3162ac8569
13 changed files with 6151 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
README.md
View File

@ -67,3 +67,35 @@ wasm-pack publish
for logging panic messages to the developer console.
* [`wee_alloc`](https://github.com/rustwasm/wee_alloc), an allocator optimized
for small code size.
# Note for myself
Crée l'arborescence www
~~~
$ wasm-pack build
$ npm init wasm-app www
$ cd www/
$ npm install
~~~
Puis :
~~~
$ vim www/package.json
--
"dependencies": {
"wasm-game-of-life": "file:../pkg", // Add this line!
--
~~~
Puis :
~~~
$ vim www/index.js
--
import * as wasm from "wasm-game-of-life";
(…)
--
~~~

144
src/lib.rs
View File

@ -8,12 +8,146 @@ use wasm_bindgen::prelude::*;
#[global_allocator]
static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
#[wasm_bindgen]
#[wasm_bindgen] // Alert export to JS
extern {
fn alert(s: &str);
pub fn alert(s: &str);
}
#[wasm_bindgen]
pub fn greet() {
alert("Hello, wasm-game-of-life!");
// Universe is represented as a linear Array of Cells
// If we want to access row 5 column 2 we apply :
// cell_pos = 5(row) * width(universe) + 2(column)
#[wasm_bindgen] // Export to JS
#[repr(u8)] // each cell is represented as a single byte
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum Cell {
Dead = 0,
Alive = 1,
}
#[wasm_bindgen] // Export to JS
pub struct Universe {
width: u32,
height: u32,
cells: Vec<Cell>,
}
// Not exported to JS
impl Universe {
fn live_neighbor_count(&self, row: u32, column: u32) -> u8 {
let mut count = 0;
for delta_row in [self.height-1, 0, 1].iter().cloned() {
for delta_col in [self.width -1, 0, 1].iter().cloned() {
if delta_row == 0 && delta_col == 0 {
continue;
}
let neighbor_row = (row + delta_row) % self.height;
let neighbor_col = (column + delta_col) % self.width;
let idx = self.get_index(neighbor_row, neighbor_col);
count += self.cells[idx] as u8;
}
}
count
}
}
use std::fmt;
impl fmt::Display for Universe {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
for line in self.cells.as_slice().chunks(self.width as usize) {
for &cell in line {
let symbol = if cell == Cell::Dead { '◻' } else { '◼' };
write!(f, "{}", symbol)?;
}
write!(f, "\n")?;
}
Ok(())
}
}
// Exported to JS
#[wasm_bindgen]
impl Universe {
pub fn get_index(&self, row: u32, column: u32) -> usize {
(row * self.width + column) as usize
}
pub fn width(&self) -> u32 {
self.width
}
pub fn height(&self) -> u32 {
self.height
}
// Return mutable pointer to Cell
pub fn cells(&mut self) -> *mut Cell {
self.cells.as_mut_ptr()
}
// Will be called by JS
pub fn tick(&mut self) {
let mut next = self.cells.clone();
for row in 0..self.height {
for col in 0..self.width {
let idx = self.get_index(row, col);
let cell = self.cells[idx];
let live_neighbors = self.live_neighbor_count(row, col);
// BM: Match + tuple c'est cool
let next_cell = match (cell, live_neighbors) {
// Rule 1: Any live cell with fewer than two live neighbours
// dies, as if caused by underpopulation.
(Cell::Alive, x) if x < 2 => Cell::Dead,
// Rule 2: Any live cell with two or three live neighbours
// lives on to the next generation.
(Cell::Alive, 2) | (Cell::Alive, 3) => Cell::Alive,
// Rule 3: Any live cell with more than three live
// neighbours dies, as if by overpopulation.
(Cell::Alive, x) if x > 3 => Cell::Dead,
// Rule 4: Any dead cell with exactly three live neighbours
// becomes a live cell, as if by reproduction.
(Cell::Dead, 3) => Cell::Alive,
// All other cells remain in the same state.
(otherwise, _) => otherwise,
};
next[idx] = next_cell;
}
}
self.cells = next;
}
pub fn new(w: u32, h: u32) -> Universe {
let width = w;
let height = h;
let cells = (0..width * height)
.map(|i| {
if i % 2 == 0 || i % 7 == 0 {
Cell::Alive
} else {
Cell::Dead
}
})
.collect();
Universe {
width,
height,
cells,
}
}
pub fn render(&self) -> String {
self.to_string()
}
}

24
www/.bin/create-wasm-app.js 100755
View File

@ -0,0 +1,24 @@
#!/usr/bin/env node
const { spawn } = require("child_process");
const fs = require("fs");
let folderName = '.';
if (process.argv.length >= 3) {
folderName = process.argv[2];
if (!fs.existsSync(folderName)) {
fs.mkdirSync(folderName);
}
}
const clone = spawn("git", ["clone", "https://github.com/rustwasm/create-wasm-app.git", folderName]);
clone.on("close", code => {
if (code !== 0) {
console.error("cloning the template failed!")
process.exit(code);
} else {
console.log("🦀 Rust + 🕸 Wasm = ❤");
}
});

2
www/.gitignore vendored 100644
View File

@ -0,0 +1,2 @@
node_modules
dist

201
www/LICENSE-APACHE 100644
View File

@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

25
www/LICENSE-MIT 100644
View File

@ -0,0 +1,25 @@
Copyright (c) [year] [name]
Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

48
www/README.md 100644
View File

@ -0,0 +1,48 @@
<div align="center">
<h1><code>Game of Life</code></h1>
<sub>Built with 🦀🕸 by <a href="https://rustwasm.github.io/">The Rust and WebAssembly Working Group</a></sub>
</div>
## About
This template is designed for depending on NPM packages that contain
Rust-generated WebAssembly and using them to create a Website.
* Want to create an NPM package with Rust and WebAssembly? [Check out
`wasm-pack-template`.](https://github.com/rustwasm/wasm-pack-template)
* Want to make a monorepo-style Website without publishing to NPM? Check out
[`rust-webpack-template`](https://github.com/rustwasm/rust-webpack-template)
and/or
[`rust-parcel-template`](https://github.com/rustwasm/rust-parcel-template).
## 🚴 Usage
```
npm init wasm-app
```
## 🔋 Batteries Included
- `.gitignore`: ignores `node_modules`
- `LICENSE-APACHE` and `LICENSE-MIT`: most Rust projects are licensed this way, so these are included for you
- `README.md`: the file you are reading now!
- `index.html`: a bare bones html document that includes the webpack bundle
- `index.js`: example js file with a comment showing how to import and use a wasm pkg
- `package.json` and `package-lock.json`:
- pulls in devDependencies for using webpack:
- [`webpack`](https://www.npmjs.com/package/webpack)
- [`webpack-cli`](https://www.npmjs.com/package/webpack-cli)
- [`webpack-dev-server`](https://www.npmjs.com/package/webpack-dev-server)
- defines a `start` script to run `webpack-dev-server`
- `webpack.config.js`: configuration file for bundling your js with webpack
## License
Licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.

5
www/bootstrap.js 100644
View File

@ -0,0 +1,5 @@
// A dependency graph that contains any wasm must all be imported
// asynchronously. This `bootstrap.js` file does the single async import, so
// that no one else needs to worry about it again.
import("./index.js")
.catch(e => console.error("Error importing `index.js`:", e));

26
www/index.html 100644
View File

@ -0,0 +1,26 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Hello wasm-pack!</title>
<style>
body {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
}
</style>
</head>
<body>
<noscript>This page contains webassembly and javascript content, please enable javascript in your browser.</noscript>
<canvas id="game-of-life-canvas"></canvas>
<script src="./bootstrap.js"></script>
</body>
</html>

138
www/index.js 100644
View File

@ -0,0 +1,138 @@
// Import the WebAssembly memory at the top of the file.
import { memory } from "wasm-game-of-life/wasm_game_of_life_bg";
import { Universe, Cell } from "wasm-game-of-life";
let req_id;
let stop = false;
const CELL_SIZE = 60; // px
const GRID_COLOR = "#CCCCCC";
const DEAD_COLOR = "#FFFFFF";
const ALIVE_COLOR = "#3399FF";
const universe = Universe.new(5,5);
const width = universe.width();
const height = universe.height();
const canvas = document.getElementById("game-of-life-canvas");
canvas.height = (CELL_SIZE + 1) * height + 1;
canvas.width = (CELL_SIZE + 1) * width + 1;
const ctx = canvas.getContext('2d');
// The JavaScript runs in a requestAnimationFrame loop.
const renderLoop = async () => {
await new Promise(r => setTimeout(r, 200));
universe.tick();
drawCells();
if (stop == false)
req_id = requestAnimationFrame(renderLoop);
};
// Return Cell position
function getCursorPos(canvas, evt) {
const rect = canvas.getBoundingClientRect();
// Bound check: It seems that the last case can overlap
let x = Math.trunc((evt.clientX - rect.left) / CELL_SIZE);
if (x >= (width))
x = x - 1;
let y = Math.trunc((evt.clientY - rect.top) / CELL_SIZE);
if (y >= (height))
y = y - 1;
return { x,
y,
};
}
canvas.addEventListener('mouseover',
function(evt) {
console.log("Stopping Animation Frame");
stop = true;
});
canvas.addEventListener('mouseout',
function(evt) {
console.log("Starting Animation Frame");
stop = false;
start();
});
// Get Mouse position
canvas.addEventListener('click',
function(evt) {
var mousePos = getCursorPos(canvas, evt);
let cellsPtr = universe.cells();
let cells = new Uint8Array(memory.buffer, cellsPtr, width * height);
console.log("Click position : X = " + (mousePos.x) + ", Y = " + (mousePos.y));
const idx = universe.get_index(mousePos.y, mousePos.x);
if (cells[idx] === Cell.Dead)
console.log("Cell[" + idx + "] is : " + "Dead !");
else
console.log("Cell[" + idx + "] is : " + "Alive !");
// Change to inverse !
cells[idx] = (cells[idx] === Cell.Dead) ? Cell.Alive : Cell.Dead;
drawCells();
});
const drawGrid = () => {
ctx.beginPath();
ctx.strokeStyle = GRID_COLOR;
// Vertical lines.
for (let i = 0; i <= width; i++) {
ctx.moveTo(i * (CELL_SIZE + 1) + 1, 0);
ctx.lineTo(i * (CELL_SIZE + 1) + 1, (CELL_SIZE + 1) * height + 1);
}
// Horizontal lines.
for (let j = 0; j <= height; j++) {
ctx.moveTo(0, j * (CELL_SIZE + 1) + 1);
ctx.lineTo((CELL_SIZE + 1) * width + 1, j * (CELL_SIZE + 1) + 1);
}
ctx.stroke();
};
// We can directly access WebAssembly's linear memory via memory, which is defined in the raw wasm module wasm_game_of_life_bg.
// To draw the cells, we get a pointer to the universe's cells, construct a Uint8Array overlaying the cells buffer, iterate over each cell, and draw a white or black rectangle depending on whether the cell is dead or alive, respectively.
// By working with pointers and overlays, we avoid copying the cells across the boundary on every tick.
const drawCells = () => {
// Modify Plus const
const cellsPtr = universe.cells();
const cells = new Uint8Array(memory.buffer, cellsPtr, width * height);
ctx.beginPath();
for (let row = 0; row < height; row++) {
for (let col = 0; col < width; col++) {
const idx = universe.get_index(row, col);
ctx.fillStyle = (cells[idx] === Cell.Dead) ? DEAD_COLOR : ALIVE_COLOR;
ctx.fillRect(
col * (CELL_SIZE + 1) + 1, // x
row * (CELL_SIZE + 1) + 1, // y
CELL_SIZE, // Width
CELL_SIZE // Height
);
}
}
ctx.stroke();
};
function start() {
drawGrid();
drawCells();
req_id = requestAnimationFrame(renderLoop);
}
start();

5459
www/package-lock.json generated 100644
View File

File diff suppressed because it is too large Load Diff

38
www/package.json 100644
View File

@ -0,0 +1,38 @@
{
"name": "Wasm GameOfLife",
"version": "0.1.0",
"description": "Game of Life in Wasm",
"main": "index.js",
"bin": {
"create-wasm-app": ".bin/create-wasm-app.js"
},
"scripts": {
"build": "webpack --config webpack.config.js",
"start": "webpack-dev-server"
},
"repository": {
"type": "git",
"url": "git+https://github.com/rustwasm/create-wasm-app.git"
},
"keywords": [
"webassembly",
"wasm",
"rust",
"webpack"
],
"author": "Ashley Williams <ashley666ashley@gmail.com>",
"license": "(MIT OR Apache-2.0)",
"bugs": {
"url": "https://github.com/rustwasm/create-wasm-app/issues"
},
"homepage": "https://dev.beneth.fr/wasm_game_of_life",
"devDependencies": {
"webpack": "^4.29.3",
"webpack-cli": "^3.1.0",
"webpack-dev-server": "^3.1.5",
"copy-webpack-plugin": "^5.0.0"
},
"dependencies": {
"wasm-game-of-life": "file:../pkg"
}
}

14
www/webpack.config.js 100644
View File

@ -0,0 +1,14 @@
const CopyWebpackPlugin = require("copy-webpack-plugin");
const path = require('path');
module.exports = {
entry: "./bootstrap.js",
output: {
path: path.resolve(__dirname, "dist"),
filename: "bootstrap.js",
},
mode: "development",
plugins: [
new CopyWebpackPlugin(['index.html'])
],
};