mirror of
https://github.com/fluencelabs/assemblyscript
synced 2025-04-25 07:02:13 +00:00
252b843c4b
* Cleans up and trims the overly large builtins file by ~1600 lines * Properly propagate inline assembler-like argument types * Use https in examples * Reformat README
137 lines
4.6 KiB
HTML
137 lines
4.6 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>Conway's Game of Life - AssemblyScript</title>
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<link rel="icon" href="https://assemblyscript.org/favicon.ico" type="image/x-icon" />
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<meta name="viewport" content="user-scalable=0" />
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<style>
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html, body { height: 100%; margin: 0; overflow: hidden; color: #111; background: #fff; font-family: sans-serif; }
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body { border-top: 2px solid #bc18d4; }
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h1 { padding: 18px 20px 20px; font-size: 12pt; margin: 0; }
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a { color: #111; text-decoration: none; }
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a:hover { color: #bc18d4; text-decoration: underline; }
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canvas { position: absolute; top: 60px; left: 20px; width: calc(100% - 40px); height: calc(100% - 80px); background: #100707; cursor: cell; user-select: none; }
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#edge { position: absolute; bottom: 40px; right: 40px; color: #fff; display: none; text-shadow: 0 1px 2px #000; -ms-user-select: none; user-select: none; }
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</style>
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</head>
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<body>
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<h1>
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<a href="https://en.wikipedia.org/wiki/Conway's_Game_of_Life">Conway's Game of Life</a> in
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<a href="http://assemblyscript.org">AssemblyScript</a>
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( <a href="https://github.com/AssemblyScript/assemblyscript/blob/master/examples/game-of-life/assembly/index.ts">source</a> )
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</h1>
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<canvas></canvas>
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<div id="edge">Might be blurry because MS Edge does not support 'image-rendering: crisp-edges' (yet) :-(</div>
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<script>"use strict";
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// Configuration
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const RGB_ALIVE = 0xD392E6;
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const RGB_DEAD = 0xA61B85;
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const BIT_ROT = 10;
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// Set up the canvas with a 2D rendering context
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var cnv = document.getElementsByTagName("canvas")[0];
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var ctx = cnv.getContext("2d");
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var bcr = cnv.getBoundingClientRect();
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// Compute the size of the universe (here: 2px per cell)
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var width = bcr.width >>> 1;
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var height = bcr.height >>> 1;
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var size = width * height;
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var byteSize = (size + size) << 2; // input & output (here: 4b per cell)
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cnv.width = width;
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cnv.height = height;
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cnv.style = `
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image-rendering: optimizeSpeed;
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image-rendering: -moz-crisp-edges;
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image-rendering: -webkit-optimize-contrast;
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image-rendering: -o-crisp-edges;
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image-rendering: optimize-contrast;
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image-rendering: crisp-edges;
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image-rendering: pixelated;
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-ms-interpolation-mode: nearest-neighbor;
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`;
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ctx.imageSmoothingEnabled = false;
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// Compute the size of and instantiate the module's memory
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var memory = new WebAssembly.Memory({ initial: ((byteSize + 0xffff) & ~0xffff) >>> 16 });
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// Fetch and instantiate the module
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fetch("build/optimized.wasm")
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.then(response => response.arrayBuffer())
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.then(buffer => WebAssembly.instantiate(buffer, {
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env: {
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memory,
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abort: function() {}
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},
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config: {
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BGR_ALIVE : rgb2bgr(RGB_ALIVE) | 1, // little endian, LSB must be set
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BGR_DEAD : rgb2bgr(RGB_DEAD) & ~1, // little endian, LSB must not be set
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BIT_ROT
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},
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Math
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}))
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.then(module => {
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var exports = module.instance.exports;
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// Initialize the module with the universe's width and height
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exports.init(width, height);
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var mem = new Uint32Array(memory.buffer);
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// Update about 30 times a second
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(function update() {
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setTimeout(update, 1000 / 30);
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mem.copyWithin(0, size, size + size); // copy output to input
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exports.step(); // perform the next step
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})();
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// Keep rendering the output at [size, 2*size]
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var imageData = ctx.createImageData(width, height);
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var argb = new Uint32Array(imageData.data.buffer);
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(function render() {
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requestAnimationFrame(render);
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argb.set(mem.subarray(size, size + size)); // copy output to image buffer
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ctx.putImageData(imageData, 0, 0); // apply image buffer
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})();
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// When clicked or dragged, fill the current row and column with random live cells
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var down = false;
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[ [cnv, "mousedown"],
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[cnv, "touchstart"]
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].forEach(eh => eh[0].addEventListener(eh[1], e => down = true));
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[ [document, "mouseup"],
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[document, "touchend"]
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].forEach(eh => eh[0].addEventListener(eh[1], e => down = false));
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[ [cnv, "mousemove"],
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[cnv, "touchmove"],
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[cnv, "mousedown"]
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].forEach(eh => eh[0].addEventListener(eh[1], e => {
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if (!down) return;
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var loc;
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if (e.touches) {
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if (e.touches.length > 1) return;
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loc = e.touches[0];
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} else {
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loc = e;
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}
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var bcr = cnv.getBoundingClientRect();
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exports.fill((loc.clientX - bcr.left) >>> 1, (loc.clientY - bcr.top) >>> 1, 0.5);
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}));
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// :-(
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if (navigator.userAgent.indexOf(" Edge/") >= 0) document.getElementById("edge").style.display = "block";
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}).catch(err => {
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alert("Failed to load WASM: " + err.message + " (ad blocker, maybe?)");
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console.log(err.stack);
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});
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// see comment in assembly/index.ts on why this is useful
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function rgb2bgr(rgb) {
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return ((rgb >>> 16) & 0xff) | (rgb & 0xff00) | (rgb & 0xff) << 16;
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}
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</script>
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</body>
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</html>
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