Add basic non-adaptive zooming
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@ -109,47 +109,62 @@ class Line {
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}
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/**
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* Global constants.
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*/
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const settings = {
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dotRadius: 10,
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stepTime: 250,
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stepsPerLevel: 5,
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};
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// Unhide main element
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doAfterLoad(() => $("main").classList.remove("hidden"));
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// Application loop(s)
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doAfterLoad(() => {
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const canvas = $("#art");
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const ctx = canvas.getContext("2d");
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// State
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const lines: Line[] = [new Line(1), new Line(2)];
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// Model
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const lines: Line[] = [new Line(1), new Line(5)];
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let step = 0;
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setInterval(() => {
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const stepLine = Math.floor(step / 25);
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const stepLine = Math.floor(step / (settings.stepsPerLevel ** 2));
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const inductionLine = stepLine + 1;
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const superInductionLine = stepLine + 2;
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// Add new low-level segment
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const length = 5 ** (2 + stepLine);
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const length = settings.stepsPerLevel ** (2 + stepLine);
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// TODO: Accumulate angles
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const angle = (random_normal() - 0.5) * Math.PI * 2;
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lines[stepLine].segments.push(new LineSegment(Math.cos(angle) * length, Math.sin(angle) * length));
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// Add first-level induction line
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if ((step + 1) % 5 === 0) {
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if ((step + 1) % settings.stepsPerLevel === 0) {
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if (lines.length <= inductionLine) {
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lines[inductionLine] = new Line(inductionLine + 1);
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lines[inductionLine] = new Line(5 ** inductionLine);
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}
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lines[inductionLine].segments.push(lines[stepLine].sumSegmentsSlice(-5));
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lines[inductionLine].segments.push(lines[stepLine].sumSegmentsSlice(-settings.stepsPerLevel));
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}
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// Add second-level induction line
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if ((step + 1) % 25 === 0) {
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if ((step + 1) % (settings.stepsPerLevel ** 2) === 0) {
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if (lines.length <= superInductionLine) {
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lines[superInductionLine] = new Line(superInductionLine + 1);
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lines[superInductionLine] = new Line(5 ** superInductionLine);
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}
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lines[superInductionLine].segments.push(lines[inductionLine].sumSegmentsSlice(-5));
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lines[superInductionLine].segments.push(lines[inductionLine].sumSegmentsSlice(-settings.stepsPerLevel));
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}
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step++;
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}, 250);
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}, settings.stepTime);
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// Resize
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const resize = () => {
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@ -159,28 +174,42 @@ doAfterLoad(() => {
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window.addEventListener("resize", resize, false);
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resize();
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// Draw
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const startTime = Date.now();
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const draw = () => {
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const center = new Point(canvas.width / 2, canvas.height / 2);
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ctx.restore();
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ctx.save();
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// Background
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ctx.fillStyle = "#000000";
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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// Draw from center
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const center = new Point(canvas.width / 2, canvas.height / 2);
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ctx.translate(center.x, center.y);
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// Center dot
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ctx.beginPath();
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ctx.fillStyle = "#ffffff";
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ctx.arc(center.x - 5, center.y - 5, 10, 0, 2 * Math.PI);
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ctx.fill();
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ctx.strokeStyle = "#ffffff";
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ctx.arc(0, 0, settings.dotRadius, 0, 2 * Math.PI);
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ctx.stroke();
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// Zoom
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// TODO: Adaptive zoom
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const nowTime = Date.now();
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const factor = settings.stepsPerLevel **
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((nowTime - startTime) / (settings.stepsPerLevel ** 2 * settings.stepTime));
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ctx.scale(1 / factor, 1 / factor);
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// Lines
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ctx.strokeStyle = "#ffffff";
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for (const line of lines) {
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ctx.lineWidth = line.thickness;
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ctx.beginPath();
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ctx.moveTo(center.x, center.y);
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ctx.moveTo(0, 0);
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let lastPos = new Point(center.x, center.y);
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let lastPos = new Point(0, 0);
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for (const segment of line.segments) {
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lastPos = new Point(lastPos.x + segment.x, lastPos.y + segment.y);
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ctx.lineTo(lastPos.x, lastPos.y);
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@ -189,6 +218,7 @@ doAfterLoad(() => {
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ctx.stroke();
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}
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// Repeat
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window.requestAnimationFrame(draw);
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};
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window.requestAnimationFrame(draw);
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