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add fractal page from old site
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7 changed files with 417 additions and 19 deletions
303
docs/fractals/fractals.js
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303
docs/fractals/fractals.js
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'use strict'
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const gpu = new GPU();
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class FractalTree {
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constructor(id, iterations, mod) {
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this.app = document.getElementById(id);
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this.canvas = this.app.getElementsByTagName("canvas")[0];
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this.canvas.width = 512;
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this.canvas.height = 448;
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this.ctx = this.canvas.getContext("2d");
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this.iterations = iterations;
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this.mod = mod;
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this.angle = Math.PI * 0.2;
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this.update = true;
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this.palette = ["#430", "#440", "#450", "#460", "#470", "#480", "#080"];
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this.canvas.addEventListener("mousemove", this.mouseMove.bind(this));
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this.canvas.addEventListener("mousedown", this.click.bind(this));
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}
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static vector(l, angle) {
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return {
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x: Math.cos(angle) * l,
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y: Math.sin(angle) * l
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};
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}
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tree(x, y, length, i, angle) {
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if (i==0) { return; }
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let dir = FractalTree.vector(length * this.mod, angle + this.angle);
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this.ctx.beginPath();
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this.ctx.moveTo(x, y);
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this.ctx.lineWidth = i;
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this.ctx.strokeStyle = this.palette[this.iterations-i];
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this.ctx.lineTo(x + dir.x, y - dir.y);
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this.ctx.stroke();
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this.tree(x + dir.x, y - dir.y, length*this.mod, i-1, angle - this.angle);
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this.tree(x + dir.x, y - dir.y, length*this.mod, i-1, angle + this.angle);
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}
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render() {
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this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
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this.tree(256, this.canvas.height-64, 128, this.iterations, Math.PI/2 - this.angle);
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}
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mouseMove(event) {
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if (this.update) {
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let x = event.clientX - this.canvas.getBoundingClientRect().left;
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this.angle = x * Math.PI / this.canvas.width;
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this.render();
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}
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}
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click(event) {
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this.update = !this.update;
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if (this.update) {
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let x = event.clientX - this.canvas.getBoundingClientRect().left;
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this.angle = x * Math.PI / this.canvas.width;
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this.render();
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}
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}
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setIter(i) {
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this.iterations = i;
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this.render();
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}
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setMod(m) {
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this.mod = m;
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this.render();
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}
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}
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class Mandelbrot {
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constructor(id, iter=255, width=512, height=512, minX=-2, minY=-1.5, maxX=1, maxY=1.5) {
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this.app = document.getElementById(id);
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this.canvas = this.app.getElementsByTagName("canvas")[0];
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this.canvas.width = width;
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this.canvas.height = height;
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this.ctx = this.canvas.getContext("2d");
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this.renderBtn = this.app.getElementsByClassName("controlbar")[0].getElementsByTagName("button")[0];
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this.renderBtn2 = this.app.getElementsByClassName("controlbar")[0].getElementsByTagName("button")[1];
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this.init(minX, minY, maxX, maxY);
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this.defaultZoom = [minX, minY, maxX, maxY];
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this.iter = iter;
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this.palette = [16, 32, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120, 128, 136, 144, 152, 160, 168, 176, 184, 192, 200, 208, 216, 224, 232, 240, 248];
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this.canvas.addEventListener("mousedown", this.zoom.bind(this));
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}
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zoom(event) {
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//zoom function
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let zoomf = 8;
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let x = this.reScaleX(event.clientX - this.canvas.getBoundingClientRect().left);
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let y = this.reScaleY(event.clientY - this.canvas.getBoundingClientRect().top);
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let dx = (this.maxX - this.minX)/zoomf;
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let dy = (this.maxY - this.minY)/zoomf;
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this.init(x - dx, y - dy, x + dx, y + dy);
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this.render();
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}
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reset() {
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this.init(this.defaultZoom[0], this.defaultZoom[1], this.defaultZoom[2], this.defaultZoom[3]);
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this.render();
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}
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setIter(x) {
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this.iter = x;
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this.render();
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}
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init(minX, minY, maxX, maxY) {
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this.minX = minX;
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this.minY = minY;
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this.maxX = maxX;
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this.maxY = maxY;
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this.scaleX = (maxX - minX) / this.canvas.width;
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this.scaleY = (maxY - minY) / this.canvas.height;
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}
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reScaleX(x) {
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return x * this.scaleX + this.minX;
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}
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reScaleY(y) {
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return y * this.scaleY + this.minY;
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}
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point(x0, y0) {
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let x = 0, y = 0;
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let i = 0;
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let x2 = 0, y2 = 0;
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while (x2 + y2 <= 4 && i < this.iter) {
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y = 2*x*y + y0;
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x = x2 - y2 + x0;
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x2 = x*x;
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y2 = y*y;
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i++;
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}
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return i;
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}
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render() {
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let start = new Date();
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let result = this.ctx.getImageData(0,0, this.canvas.width, this.canvas.height);
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let px = 0;
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let yp;
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for (let yPos = 0; yPos < this.canvas.height; yPos++) {
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yp = this.reScaleY(yPos);
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for (let xPos = 0; xPos < this.canvas.width; xPos++) {
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let i = this.point(this.reScaleX(xPos), yp);
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if (i != this.iter) {
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let col = this.palette[Math.min(i, this.palette.length-1)]
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result.data[px] = 0;
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result.data[px+1] = col;
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result.data[px+2] = col;
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} else {
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result.data[px] = 0;
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result.data[px+1] = 0;
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result.data[px+2] = 0;
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}
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result.data[px+3] = 255;
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px += 4;
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}
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}
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this.ctx.putImageData(result, 0, 0);
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this.renderBtn.textContent = `Reset ${new Date() - start}ms`;
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}
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gpuRender() {
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let start = new Date();
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let kernel = gpu.createKernel(function(scaleX, scaleY, minX, minY, iter) {
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let x0 = this.thread.x * scaleX + minX;
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let y0 = this.thread.y * scaleY + minY;
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let x = 0, y = 0;
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let i = 0;
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let x2 = 0, y2 = 0;
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while (x2 + y2 < 4 && i < iter) {
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y = 2*x*y + y0;
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x = x2 - y2 + x0;
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x2 = x*x;
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y2 = y*y;
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i++;
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}
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if (i != iter) {
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this.color(0, i/iter, i/iter, 1);
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this.color(0, i/255, i/255, 1);//i is 0?
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this.color(this.thread.x/512, this.thread.y/512, i/255);
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} else {
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this.color(1, 0, 0, 1);
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}
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//this.color(this.thread.x/512, this.thread.y/512, i/256);
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//this.color(x0, y0, 0, 1)
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},
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{output:[512, 512], graphical:true, loopMaxIterations: this.iter});
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kernel(this.scaleX, this.scaleY, this.minX, this.minY, this.iter);
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//let kernel = gpu.createKernel(function() {this.color(0, 0, 1);}).setOutput([512, 512]).setGraphical(true);
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//kernel();
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let result = kernel.getPixels();
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this.ctx.putImageData(new ImageData(result, 512, 512), 0, 0);
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this.renderBtn.textContent = `Reset ${new Date() - start}ms`;
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}
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}
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class Multibrot extends Mandelbrot {
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constructor(id, power, iter=255, width=512, height=512, minX=-2, minY=-2, maxX=2, maxY=2) {
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super(id, iter, width, height, minX, minY, maxX, maxY);
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this.power = power;
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}
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point(x0, y0) {
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let x = 0, y = 0;
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let i = 0;
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let xtmp, xxyyn, atn;
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let n2 = this.power/2;
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while (x*x + y*y <= 4 && i < this.iter) {
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xxyyn = (x*x+y*y)**(n2);
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atn = this.power*Math.atan2(y, x);
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xtmp = xxyyn * Math.cos(atn) + x0;
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y = xxyyn * Math.sin(atn) + y0;
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x = xtmp;
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i++;
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}
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return i;
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}
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setPower(x) {
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this.power = x;
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this.render();
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}
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}
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class Julia extends Mandelbrot {
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constructor(id, iter=255, width=512, height=512, minX=-2, minY=-2, maxX=2, maxY=2) {
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super(id, iter, width, height, minX, minY, maxX, maxY);
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this.cx = this.reScaleX(width/2);
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this.cy = this.reScaleY(height/3.2);
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this.update = true;
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this.canvas.removeEventListener("mousedown", this.zoom);
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this.canvas.addEventListener("mousedown", this.click.bind(this));
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this.canvas.addEventListener("mousemove", this.mouseMove.bind(this));
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}
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click(event) {
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this.update = !this.update;
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this.mouseMove(event);
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}
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zoom() {
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return;
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}
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mouseMove(event) {
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if (this.update) {
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this.cx = this.reScaleX(event.clientX - this.canvas.getBoundingClientRect().left);
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this.cy = this.reScaleY(event.clientY - this.canvas.getBoundingClientRect().top);
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this.render();
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}
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}
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point(zx, zy) {
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let i = 0, xtmp = 0;
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let zx2 = zx*zx, zy2 = zy*zy;
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while (zx2 + zy2 < 4 && i < this.iter) {
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xtmp = zx2 - zy2;
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zy = 2*zx*zy + this.cy;
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zx = xtmp + this.cx;
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zx2 = zx*zx;
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zy2 = zy*zy;
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i++;
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}
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return i;
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}
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}
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let fractalTree = new FractalTree("fractal-tree", 12, 0.75);
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let mandelbrot = new Mandelbrot("mandelbrot");
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let multibrot = new Multibrot("multibrot", 4);
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let juliaSet = new Julia("julia-set", 64, 512, 512);
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fractalTree.render();
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mandelbrot.render();
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juliaSet.render();
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@ -22,7 +22,47 @@
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</nav>
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<main>
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<h1>Fractals</h1>
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<p>this is real content i promise</p>
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<h2>Fractal tree</h2>
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<p>This is a fractal tree.</p>
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<p>The tree splits into two parts, with an angle defined by the cursor's x positon. The number of iterations is defined by the first input field (which defaults to 12). Each branch is slightly smaller than its parent, as defined by the second input field. Click the canvas to freeze the image at any moment.</p>
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<div class="demo-render" id="fractal-tree">
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<canvas></canvas>
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<div class="controlbar">
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<input type="number" min=6 max=15 value=12 onchange="fractalTree.setIter(value)">
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<input type="number" min=0.65 max=1 step=0.025 value=0.75 onchange="fractalTree.setMod(value)">
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</div>
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</div>
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<h2>Mandelbrot</h2>
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<p>The mandelbrot set is defined as the set of complex numbers for which a specific function (<i>F<sub>c</sub>(z) = z<sup>2</sup> + c</i>) stays within distance 2 from the origin when iterated from z=0.</p>
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<div class="demo-render" id="mandelbrot">
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<canvas></canvas>
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<div class="controlbar">
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<button type="button" onclick="mandelbrot.reset()">Reset</button>
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<button type="button" onclick="mandelbrot.gpuRender()">GPU</button>
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<input type="number" min=1 max=1000 value=256 onchange="mandelbrot.setIter(value)">
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</div>
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</div>
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<h2>Multibrot set</h2>
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<p>A multibrot set is a variant of the mandelbrot set where the functions exponent can be anything. If the exponent (third input field) is 2, you get the regular mandelbrot set.</p>
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<div class="demo-render" id="multibrot">
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<canvas></canvas>
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<div class="controlbar">
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<button type="button" onclick="multibrot.reset()">Reset</button>
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<input type="number" min=1 max=1000 value=256 onchange="multibrot.setIter(value)">
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<input type="number" min=0 max=32 step=0.1 value=4 onchange="multibrot.setPower(value)">
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</div>
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</div>
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<h2>Julia set</h2>
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<p>The julia set is similar to the mandelbrot set.</p>
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<div class="demo-render" id="julia-set">
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<canvas></canvas>
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<div class="controlbar">
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<button type="button" onclick="juliaSet.reset()">Reset</button>
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<input type="number" min=8 max=1000 value=80 step=8 onchange="juliaSet.setIter(value)">
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</div>
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</div>
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<script src="/libraries/gpu-browser.min.js"></script>
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<script src="fractals.js"></script>
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</main>
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<footer>
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<p>crispypin.cc</p>
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14
docs/libraries/gpu-browser.min.js
vendored
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14
docs/libraries/gpu-browser.min.js
vendored
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File diff suppressed because one or more lines are too long
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@ -52,17 +52,22 @@ header h1 {
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footer {
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grid-column: 1 / -1;
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margin: 25px;
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margin-top: 5px;
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margin-bottom: 10px;
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text-align: center;
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}
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footer p {
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margin: 5px;
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}
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main {
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padding: 0 20px;
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grid-column: 2 / -2;
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background-color: #282828;
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}
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.render {
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.demo-render {
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margin: 20px;
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width: -webkit-min-content;
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width: -moz-min-content;
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}
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.clickable, nav li, .controlbar button, .controlbar input, .scroll-reset {
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border-radius: 4px;
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background-color: #4a4;
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}
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bottom: 20px;
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width: 40px;
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height: 40px;
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border-radius: 25%;
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background-image: url("uparrow.png");
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cursor: pointer;
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}
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.img-right {
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float: right;
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}
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/*# sourceMappingURL=style.css.map */
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@ -1,6 +1,6 @@
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{
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"version": 3,
|
||||
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|
||||
"mappings": "AAWA,AAAA,IAAI,CAAC;EACD,WAAW,EAAE,8CAA8C;EAC3D,gBAAgB,EARV,OAAO;EASb,KAAK,EANI,IAAI;EAQb,OAAO,EAAE,IAAI;EACb,kBAAkB,EAAE,kBAAkB;EAEtC,qBAAqB,EAAE,aAAa;EAEpC,MAAM,EAAE,CAAC;EACT,UAAU,EAAE,KAAK;CAEpB;;AAED,AAAA,GAAG,CAAC;EACA,WAAW,EAAE,MAAM;CAoBtB;;AArBD,AAEI,GAFD,CAEC,EAAE,CAAC;EACC,eAAe,EAAE,IAAI;EACrB,MAAM,EAAE,CAAC;EACT,OAAO,EAAE,IAAI;EACb,OAAO,EAAE,QAAQ;EACjB,QAAQ,EAAE,GAAG;EACb,qBAAqB,EAAE,sCAAsC;CAChE;;AATL,AAUI,GAVD,CAUC,EAAE,CAAC;EAEC,OAAO,EAAE,GAAG;CACf;;AAbL,AAcI,GAdD,CAcC,CAAC,CAAC;EACE,SAAS,EAAE,IAAI;EACf,KAAK,EAAE,IAAI;EACX,eAAe,EAAE,IAAI;EACrB,OAAO,EAAE,KAAK;EACd,UAAU,EAAE,MAAM;CACrB;;AAGL,AAAA,MAAM,CAAC;EACH,WAAW,EAAE,MAAM;EACnB,gBAAgB,EA9CV,OAAO;EA+Cb,OAAO,EAAE,CAAC;CAKb;;AARD,AAII,MAJE,CAIF,EAAE,CAAC;EACC,SAAS,EAAE,IAAI;EACf,MAAM,EAAE,CAAC;CACZ;;AAGL,AAAA,MAAM,CAAC;EACH,WAAW,EAAE,MAAM;EACnB,UAAU,EAAE,GAAG;EACf,aAAa,EAAE,IAAI;EACnB,UAAU,EAAE,MAAM;CAIrB;;AARD,AAKI,MALE,CAKF,CAAC,CAAC;EACE,MAAM,EAAE,GAAG;CACd;;AAGL,AAAA,IAAI,CAAC;EACD,OAAO,EAAE,MAAM;EACf,WAAW,EAAE,MAAM;EACnB,gBAAgB,EAlEL,OAAO;CAmErB;;AAED,AAAA,YAAY,CAAC;EACT,MAAM,EAAE,IAAI;EACZ,KAAK,EAAE,WAAW;EAClB,gBAAgB,EAAE,IAAI;CACzB;;AAED,AAAA,WAAW,CAAC;EACR,gBAAgB,EA7EV,OAAO;EA8Eb,OAAO,EAAE,OAAO;EAChB,MAAM,EAAE,WAAW;EACnB,OAAO,EAAE,IAAI;EAEb,eAAe,EAAE,YAAY;EAC7B,aAAa,EAAE,OAAO;EACtB,SAAS,EAAE,IAAI;CAuDlB;;AA/DD,AAUI,WAVO,CAUP,MAAM,EAVV,WAAW,CAUC,KAAK,CAAC;EAEV,OAAO,EAAE,OAAO;EAChB,MAAM,EAAE,IAAI;EACZ,MAAM,EAAE,cAAc;EACtB,MAAM,EAAE,CAAC;EACT,MAAM,EAAE,OAAO;EAEf,SAAS,EAAE,CAAC;EACZ,MAAM,EAAE,GAAG;CACd;;AApBL,AAqBI,WArBO,CAqBP,OAAO,CAAC;EACJ,kBAAkB,EAAE,IAAI;EACxB,eAAe,EAAE,IAAI;EACrB,OAAO,EAAE,IAAI;EACb,aAAa,EAAE,CAAC;EAChB,MAAM,EAAE,IAAI;EACZ,OAAO,EAAE,CAAC;EACV,MAAM,EAAE,GAAG;EACX,MAAM,EAAE,OAAO;CAwBlB;;AArDL,AA+BQ,WA/BG,CAqBP,OAAO,AAUF,sBAAsB,CAAC;EACpB,kBAAkB,EAAE,IAAI;EACxB,UAAU,EAAE,IAAI;EAChB,aAAa,EAAE,GAAG;EAClB,KAAK,EAAE,IAAI;EACX,MAAM,EAAE,IAAI;EACZ,gBAAgB,EAnHT,IAAI;EAoHX,MAAM,EAAE,CAAC;EACT,aAAa,EAAE,CAAC;EAChB,MAAM,EAAE,cAAc;CACzB;;AAzCT,AA0CQ,WA1CG,CAqBP,OAAO,AAqBF,kBAAkB,CAAC;EAChB,6CAA6C;EAC7C,eAAe,EAAE,IAAI;EACrB,KAAK,EAAE,IAAI;EACX,MAAM,EAAE,IAAI;EACZ,gBAAgB,EA7HT,IAAI;EA8HX,MAAM,EAAE,CAAC;EACT,OAAO,EAAE,CAAC;EACV,aAAa,EAAE,CAAC;EAChB,MAAM,EAAE,cAAc;CACzB;;AApDT,AAsDI,WAtDO,CAsDP,KAAK,CAAC;EACF,gBAAgB,EAnId,OAAO;EAoIT,KAAK,EAAE,IAAI;EACX,MAAM,EAAE,GAAG;EACX,WAAW,EAAE,6CAA6C;CAC7D;;AA3DL,AA4DI,WA5DO,CA4DP,YAAY,CAAC;EACT,UAAU,EAAE,GAAG;CAClB;;AAGL,AAAA,UAAU,EAxHV,GAAG,CAUC,EAAE,EA6CN,WAAW,CAUP,MAAM,EAVV,WAAW,CAUC,KAAK,EAwEjB,aAAa,CAjBF;EACP,aAAa,EAAE,GAAG;EAClB,gBAAgB,EApJR,IAAI;CAiKf;;AAfD,AAGI,UAHM,AAGL,MAAM,EA3HX,GAAG,CAUC,EAAE,AAiHD,MAAM,EApEX,WAAW,CAUP,MAAM,AA0DL,MAAM,EApEX,WAAW,CAUC,KAAK,AA0DZ,MAAM,EAcX,aAAa,AAdR,MAAM,CAAC;EACJ,gBAAgB,EApJN,IAAI;CAqJjB;;AALL,AAMI,UANM,AAML,OAAO,EA9HZ,GAAG,CAUC,EAAE,AAoHD,OAAO,EAvEZ,WAAW,CAUP,MAAM,AA6DL,OAAO,EAvEZ,WAAW,CAUC,KAAK,AA6DZ,OAAO,EAWZ,aAAa,AAXR,OAAO,CAAC;EACL,gBAAgB,EAtJL,IAAI;CAuJlB;;AARL,AASI,UATM,AASL,SAAS,EAjId,GAAG,CAUC,EAAE,AAuHD,SAAS,EA1Ed,WAAW,CAUP,MAAM,AAgEL,SAAS,EA1Ed,WAAW,CAUC,KAAK,AAgEZ,SAAS,EAQd,aAAa,AARR,SAAS,CAAC;EACP,gBAAgB,EAxJH,IAAI;EAyJjB,eAAe,EAAE,YAAY;EAC7B,KAAK,EAAE,IAAI;EACX,MAAM,EAAE,OAAO;CAClB;;AAGL,AAAA,aAAa,CAAC;EAEV,QAAQ,EAAE,KAAK;EACf,KAAK,EAAE,IAAI;EACX,MAAM,EAAE,IAAI;EACZ,KAAK,EAAE,IAAI;EACX,MAAM,EAAE,IAAI;EACZ,gBAAgB,EAAE,kBAAkB;EACpC,MAAM,EAAE,OAAO;CAClB",
|
||||
"sources": [
|
||||
"style.scss"
|
||||
],
|
||||
|
|
|
|||
|
|
@ -59,8 +59,12 @@ header {
|
|||
|
||||
footer {
|
||||
grid-column: 1 / -1;
|
||||
margin: 25px;
|
||||
margin-top: 5px;
|
||||
margin-bottom: 10px;
|
||||
text-align: center;
|
||||
p {
|
||||
margin: 5px;
|
||||
}
|
||||
}
|
||||
|
||||
main {
|
||||
|
|
@ -69,7 +73,7 @@ main {
|
|||
background-color: $main-page-bg;
|
||||
}
|
||||
|
||||
.render {
|
||||
.demo-render {
|
||||
margin: 20px;
|
||||
width: min-content;
|
||||
background-color: #000;
|
||||
|
|
@ -141,6 +145,7 @@ main {
|
|||
}
|
||||
|
||||
.clickable {
|
||||
border-radius: 4px;
|
||||
background-color: $main-item;
|
||||
&:hover {
|
||||
background-color: $main-item-hover;
|
||||
|
|
@ -163,11 +168,6 @@ main {
|
|||
bottom: 20px;
|
||||
width: 40px;
|
||||
height: 40px;
|
||||
border-radius: 25%;
|
||||
background-image: url("uparrow.png");
|
||||
cursor: pointer;
|
||||
}
|
||||
|
||||
.img-right {
|
||||
float: right;
|
||||
}
|
||||
|
|
@ -11,7 +11,47 @@
|
|||
<include header.html/>
|
||||
<main>
|
||||
<h1>Fractals</h1>
|
||||
<p>this is real content i promise</p>
|
||||
<h2>Fractal tree</h2>
|
||||
<p>This is a fractal tree.</p>
|
||||
<p>The tree splits into two parts, with an angle defined by the cursor's x positon. The number of iterations is defined by the first input field (which defaults to 12). Each branch is slightly smaller than its parent, as defined by the second input field. Click the canvas to freeze the image at any moment.</p>
|
||||
<div class="demo-render" id="fractal-tree">
|
||||
<canvas></canvas>
|
||||
<div class="controlbar">
|
||||
<input type="number" min=6 max=15 value=12 onchange="fractalTree.setIter(value)">
|
||||
<input type="number" min=0.65 max=1 step=0.025 value=0.75 onchange="fractalTree.setMod(value)">
|
||||
</div>
|
||||
</div>
|
||||
<h2>Mandelbrot</h2>
|
||||
<p>The mandelbrot set is defined as the set of complex numbers for which a specific function (<i>F<sub>c</sub>(z) = z<sup>2</sup> + c</i>) stays within distance 2 from the origin when iterated from z=0.</p>
|
||||
<div class="demo-render" id="mandelbrot">
|
||||
<canvas></canvas>
|
||||
<div class="controlbar">
|
||||
<button type="button" onclick="mandelbrot.reset()">Reset</button>
|
||||
<button type="button" onclick="mandelbrot.gpuRender()">GPU</button>
|
||||
<input type="number" min=1 max=1000 value=256 onchange="mandelbrot.setIter(value)">
|
||||
</div>
|
||||
</div>
|
||||
<h2>Multibrot set</h2>
|
||||
<p>A multibrot set is a variant of the mandelbrot set where the functions exponent can be anything. If the exponent (third input field) is 2, you get the regular mandelbrot set.</p>
|
||||
<div class="demo-render" id="multibrot">
|
||||
<canvas></canvas>
|
||||
<div class="controlbar">
|
||||
<button type="button" onclick="multibrot.reset()">Reset</button>
|
||||
<input type="number" min=1 max=1000 value=256 onchange="multibrot.setIter(value)">
|
||||
<input type="number" min=0 max=32 step=0.1 value=4 onchange="multibrot.setPower(value)">
|
||||
</div>
|
||||
</div>
|
||||
<h2>Julia set</h2>
|
||||
<p>The julia set is similar to the mandelbrot set.</p>
|
||||
<div class="demo-render" id="julia-set">
|
||||
<canvas></canvas>
|
||||
<div class="controlbar">
|
||||
<button type="button" onclick="juliaSet.reset()">Reset</button>
|
||||
<input type="number" min=8 max=1000 value=80 step=8 onchange="juliaSet.setIter(value)">
|
||||
</div>
|
||||
</div>
|
||||
<script src="/libraries/gpu-browser.min.js"></script>
|
||||
<script src="fractals.js"></script>
|
||||
</main>
|
||||
<include footer.html/>
|
||||
</body>
|
||||
|
|
|
|||
Loading…
Reference in a new issue