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authorElizabeth Alexander Hunt <me@liz.coffee>2026-07-05 12:42:44 -0700
committerElizabeth Alexander Hunt <me@liz.coffee>2026-07-05 12:42:44 -0700
commit94b912b649150b9863a62096ba4740b2cc8ad21a (patch)
tree1882236fc980fa5946d3089a2f2e4670f3a70580 /src/toys/julia
parentab0ddcaeb1fc37351d14b89100e07d3a343ba9e1 (diff)
downloadlizdotcoffee-94b912b649150b9863a62096ba4740b2cc8ad21a.tar.gz
lizdotcoffee-94b912b649150b9863a62096ba4740b2cc8ad21a.zip
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Diffstat (limited to 'src/toys/julia')
-rw-r--r--src/toys/julia/index.html51
-rw-r--r--src/toys/julia/julia.js136
2 files changed, 0 insertions, 187 deletions
diff --git a/src/toys/julia/index.html b/src/toys/julia/index.html
deleted file mode 100644
index 9d9de51..0000000
--- a/src/toys/julia/index.html
+++ /dev/null
@@ -1,51 +0,0 @@
-<!DOCTYPE html>
-
-<html>
- <head>
- <style>
- body {
- height: 100vh;
- width: 100vw;
- margin: 0;
- }
- .bottomRight {
- padding: 12px;
- position: fixed;
- bottom: 0;
- right: 0;
- background-color: rgba(255,255,255,0.5);
- border: 1px solid white;
- border-radius: 8px;
- margin-right: 6px;
- margin-bottom: 6px;
- }
- .verticalSlider
- {
- writing-mode: bt-lr; /* IE */
- -webkit-appearance: slider-vertical; /* Chromium */
- width: 8px;
- padding: 0 5px;
- }
- </style>
- </head>
- <body>
- <div id="canvasHolder">
-
- </div>
- <div class="bottomRight">
- <input orient="vertical" type="range" min="-1000" max="1000" value="0" id="imaginarySlider" class="verticalSlider">
- <input type="range" min="-1000" max="1000" value="0" id="realSlider">
- <br>
- imaginary: <input id="imag-val" size="10" type="number" step="0.001"></input>
- <button id="animate-imag" onclick="startAnim('animate-imag', 'ci')">Animate</button>
- <br>
- real: <input id="real-val" size="10" type="number" step="0.001"></input>
- <button id="animate-real" onclick="startAnim('animate-real', 'cr')">Animate</button>
- <br>
- powered by <a href="https://github.com/gpujs/gpu.js">gpu.js</a>
- </div>
-
- <script src="https://cdn.jsdelivr.net/npm/gpu.js@latest/dist/gpu-browser.min.js"></script>
- <script src="julia.js"></script>
- </body>
-</html>
diff --git a/src/toys/julia/julia.js b/src/toys/julia/julia.js
deleted file mode 100644
index 38bcd4d..0000000
--- a/src/toys/julia/julia.js
+++ /dev/null
@@ -1,136 +0,0 @@
-const MIN_ZOOM = 0.0001;
-const MAX_ZOOM = 4;
-const C_THRESHOLD = Math.sqrt(2)/2;
-const SLIDER_DIV = 2000*C_THRESHOLD;
-
-const gpu = new GPU.GPU();
-const buildRender = (width, height) => gpu.createKernel(function (maxIterations, cr, ci, centerX, centerY, zoom, colorMultipliers) {
- let zx = (this.output.x / this.output.y) * (centerX + (4 * this.thread.x / this.output.x - 2) * (zoom / 4));
- let zy = centerY + (4 * this.thread.y / this.output.y - 2) * (zoom / 4);
- let iterations = 0;
- for (let i = 0; i < maxIterations; i++) {
- const xtemp = zx * zx - zy * zy + cr;
- zy = 2 * zx * zy + ci;
- zx = xtemp;
- if (zx * zx + zy * zy > 4) {
- iterations = i;
- break;
- }
- }
- if (iterations == 0 || iterations == maxIterations) {
- this.color(0, 0, 0);
- } else {
- this.color(colorMultipliers[0] * iterations, colorMultipliers[1] * iterations, colorMultipliers[2] * iterations);
- }
-}, { output: [width, height], graphical: true });
-
-const canvasHolder = document.getElementById('canvasHolder');
-let render; // The GPU kernel built from buildRender
-let state = {
- colorMultipliers: [0.01 * Math.random() + 0.015, 0.03 * Math.random() + 0.007, 0.02 * Math.random() + 0.010],
- changes: {
- centerX: 0,
- centerY: 0,
- zoom: 3,
- cr: parseFloat(document.getElementById('realSlider').value) / SLIDER_DIV,
- ci: parseFloat(document.getElementById('imaginarySlider').value) / SLIDER_DIV,
- maxIterations: 1000,
- width: document.body.clientWidth,
- height: document.body.clientHeight,
- },
-};
-
-const doRender = (renderF, state) => {
- // gpu.js doesn't support JS objects as kernel parameters - https://github.com/gpujs/gpu.js/issues/245
- renderF(state.maxIterations, state.cr, state.ci, state.centerX, state.centerY, state.zoom, state.colorMultipliers);
-};
-
-const loop = () => {
- const stateChanges = Object.keys(state.changes);
- if (stateChanges.length > 0) {
- state = {...state, ...state.changes};
- if (state.changes.width || state.changes.height) {
- render = buildRender(state.width, state.height);
- canvasHolder.appendChild(render.canvas);
- }
- if (typeof state.changes.ci !== 'undefined') {
- document.getElementById('imag-val').value = state.ci.toFixed(4);
- document.getElementById('imaginarySlider').value = state.changes.ci * SLIDER_DIV;
- }
- if (typeof state.changes.cr !== 'undefined') {
- document.getElementById('real-val').value = state.cr.toFixed(4);
- document.getElementById('realSlider').value = state.changes.cr * SLIDER_DIV;
- }
- state.changes = {};
- doRender(render, state);
- }
-
- requestAnimationFrame(loop);
-};
-
-loop();
-
-// UI Code
-
-const startAnim = (sliderId, complexComponentName='ci') => {
- const restart = (interval) => {
- clearInterval(interval);
- document.getElementById(sliderId).innerHTML = 'Animate';
- document.getElementById(sliderId).onclick = ()=>startAnim(sliderId, complexComponentName);
- return;
- };
- const start = setInterval(() => {
- if (state[complexComponentName] >= C_THRESHOLD) {
- restart(start);
- }
-
- state.changes[complexComponentName] = state[complexComponentName] + 0.001;
- }, 1000/60);
- document.getElementById(sliderId).innerHTML = 'Stop';
- document.getElementById(sliderId).onclick = ()=>restart(start);
-};
-
-document.getElementById('imaginarySlider').oninput = function() {
- state.changes.ci = parseFloat(this.value) / SLIDER_DIV;
-};
-document.getElementById('realSlider').oninput = function() {
- state.changes.cr = parseFloat(this.value) / SLIDER_DIV;
-};
-
-document.getElementById('imag-val').addEventListener('change', function (e) {
- state.changes.ci = parseFloat(this.value);
-});
-document.getElementById('real-val').addEventListener('change', function (e) {
- state.changes.cr = parseFloat(this.value);
-});
-
-canvasHolder.addEventListener('wheel', (e) => {
- e.preventDefault();
- state.changes.zoom = Math.min(Math.max(state.zoom + e.deltaY * 0.001 * state.zoom, MIN_ZOOM), MAX_ZOOM);
-});
-
-let isDown = false;
-canvasHolder.addEventListener('mousedown', (e) => {
- e.preventDefault();
- isDown = true;
-}, true);
-
-canvasHolder.addEventListener('mouseup', (e) => {
- e.preventDefault();
- isDown = false;
-}, true);
-
-canvasHolder.addEventListener('mousemove', (e) => {
- e.preventDefault();
- if (isDown) {
- let deltaX = -e.movementX * state.zoom / document.body.clientWidth;
- let deltaY = e.movementY * state.zoom / document.body.clientHeight;
- state.changes.centerX = state.centerX + deltaX;
- state.changes.centerY = state.centerY + deltaY;
- }
-}, true);
-
-window.addEventListener('resize', () => {
- state.changes.width = document.body.clientWidth;
- state.changes.height = document.body.clientHeight;
-});
generated by cgit v1.3 (git 2.53.0) at 2026-08-13 23:33:28 +0000