Epilepsy_Test/oscillation.html at main · alexanderdfox/Epilepsy_Test · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Grid Bouncing Universes</title>
  <style>
	html, body {
	  margin: 0;
	  background: black;
	  overflow: hidden;
	}
	canvas {
	  display: block;
	}
  </style>
</head>
<body>
  <canvas id="universeCanvas"></canvas>

  <script>
	const canvas = document.getElementById("universeCanvas");
	const ctx = canvas.getContext("2d");

	function resizeCanvas() {
	  canvas.width = window.innerWidth;
	  canvas.height = window.innerHeight;
	}
	window.addEventListener("resize", resizeCanvas);
	resizeCanvas();

	const size = 100;
	const radius = size / 2;
	const cols = 10;
	const rows = 10;
	const nestedCircles = 20;
	const scaleFactor = 0.65;
	const universes = [];

	class Universe {
	  constructor(x, y) {
		this.x = x;
		this.y = y;
		this.vx = (Math.random() - 0.5) * 1.5;
		this.vy = (Math.random() - 0.5) * 1.5;
		this.rotation = Math.random() * 2 * Math.PI;
		this.rotationSpeed = (Math.random() - 0.5) * 0.01;
		this.phaseOffset = Math.random() * Math.PI * 2;
	  }

	  update(time) {
		this.x += this.vx;
		this.y += this.vy;
		this.rotation += this.rotationSpeed;

		// Edge bounce
		if (this.x - radius < 0 || this.x + radius > canvas.width) this.vx *= -1;
		if (this.y - radius < 0 || this.y + radius > canvas.height) this.vy *= -1;

		this.draw(time);
	  }

	  draw(time) {
		ctx.save();
		ctx.translate(this.x, this.y);
		ctx.rotate(this.rotation);

		for (let i = 0; i < nestedCircles; i++) {
		  let r = radius * Math.pow(scaleFactor, i);
		  let pulse = 1 + 0.05 * Math.sin(time / 300 + i + this.phaseOffset);
		  r *= pulse;

		  const hue = (240 + i * 7 + this.phaseOffset * 50) % 360;
		  ctx.strokeStyle = `hsl(${hue}, 80%, 60%)`;
		  ctx.lineWidth = 1;
		  ctx.beginPath();
		  ctx.arc(0, 0, r, 0, 2 * Math.PI);
		  ctx.stroke();
		}

		ctx.restore();
	  }
	}

	function initializeGrid() {
	  const startX = (canvas.width - cols * size) / 2;
	  const startY = (canvas.height - rows * size) / 2;

	  for (let row = 0; row < rows; row++) {
		for (let col = 0; col < cols; col++) {
		  const x = startX + col * size + radius;
		  const y = startY + row * size + radius;
		  universes.push(new Universe(x, y));
		}
	  }
	}

	function resolveCollisions() {
	  for (let i = 0; i < universes.length; i++) {
		for (let j = i + 1; j < universes.length; j++) {
		  const a = universes[i];
		  const b = universes[j];

		  const dx = b.x - a.x;
		  const dy = b.y - a.y;
		  const dist = Math.sqrt(dx * dx + dy * dy);
		  const minDist = size;

		  if (dist < minDist && dist > 0) {
			// Normalize
			const nx = dx / dist;
			const ny = dy / dist;

			// Relative velocity
			const dvx = b.vx - a.vx;
			const dvy = b.vy - a.vy;
			const dot = dvx * nx + dvy * ny;

			if (dot < 0) {
			  const impulse = dot;
			  a.vx += impulse * nx;
			  a.vy += impulse * ny;
			  b.vx -= impulse * nx;
			  b.vy -= impulse * ny;
			}

			// Positional separation
			const overlap = (minDist - dist) / 2;
			a.x -= nx * overlap;
			a.y -= ny * overlap;
			b.x += nx * overlap;
			b.y += ny * overlap;
		  }
		}
	  }
	}

	initializeGrid();

	function animate(time) {
	  ctx.clearRect(0, 0, canvas.width, canvas.height);
	  resolveCollisions();

	  for (const u of universes) {
		u.update(time);
	  }

	  requestAnimationFrame(animate);
	}

	requestAnimationFrame(animate);
  </script>
</body>
</html>