robschoen/bubbles.html at main · millxing/robschoen · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Bubble Canvas</title>
  <link rel="icon" type="image/png" href="./nano.png" />
  <link rel="preconnect" href="https://fonts.googleapis.com" />
  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
  <link
    href="https://fonts.googleapis.com/css2?family=Quicksand:wght@400;700&display=swap"
    rel="stylesheet"
  />
  <style>
    :root {
      color-scheme: light;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      width: 100vw;
      height: 100vh;
      overflow: hidden;
      background: #000000;
      font-family: "Quicksand", sans-serif;
    }

    #canvas {
      position: relative;
      width: 100%;
      height: 100%;
    }

    .bubble {
      position: absolute;
      width: 500px;
      height: 180px;
      border-radius: 999px;
      border: 2px solid #d783a9;
      background: #efacc8;
      color: #6f425b;
      text-decoration: none;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 0 16px;
      font-size: 2.6rem;
      font-weight: 600;
      line-height: 1.2;
      backdrop-filter: blur(2px);
      cursor: pointer;
      user-select: none;
    }

    .bubble:hover,
    .bubble:focus-visible {
      background: #f4b7d0;
      outline: none;
    }
  </style>
</head>
<body>
  <main id="canvas" aria-label="Animated bubble links"></main>

  <script>
    const BUBBLES = [
      {
        text: "Brookline Town Meeting Votes",
        url: "https://millxing.github.io/TM/TMMvotes.html",
      },
      {
        text: "Extra Pass Anaytics",
        url: "https://extrapass.onrender.com/",
      },
      {
        text: "Washington Street Journal",
        url: "https://millxing.github.io/BF/",
      },
    ];
    const BUBBLE_WIDTH = 500;
    const BUBBLE_HEIGHT = 180;
    const MIN_SPEED = 24; // px per second
    const MAX_SPEED = 44; // px per second

    const canvas = document.getElementById("canvas");
    const bubbles = [];
    let lastTime = 0;

    function randomInRange(min, max) {
      return Math.random() * (max - min) + min;
    }

    function clamp(value, min, max) {
      return Math.min(Math.max(value, min), max);
    }

    function overlapsAtPosition(x, y, other) {
      return (
        x < other.x + BUBBLE_WIDTH &&
        x + BUBBLE_WIDTH > other.x &&
        y < other.y + BUBBLE_HEIGHT &&
        y + BUBBLE_HEIGHT > other.y
      );
    }

    function createBubble(bubbleData) {
      const link = document.createElement("a");
      link.className = "bubble";
      link.href = bubbleData.url;
      link.target = "_blank";
      link.rel = "noopener noreferrer";
      link.textContent = bubbleData.text;
      link.setAttribute("aria-label", bubbleData.text);

      link.addEventListener("click", (event) => {
        event.preventDefault();
        window.open(bubbleData.url, "_blank", "noopener,noreferrer");
      });

      canvas.appendChild(link);

      const maxX = Math.max(0, window.innerWidth - BUBBLE_WIDTH);
      const maxY = Math.max(0, window.innerHeight - BUBBLE_HEIGHT);
      const angle = randomInRange(0, Math.PI * 2);
      const speed = randomInRange(MIN_SPEED, MAX_SPEED);
      let x = 0;
      let y = 0;
      let placed = false;

      for (let attempts = 0; attempts < 150; attempts += 1) {
        const candidateX = randomInRange(0, maxX);
        const candidateY = randomInRange(0, maxY);
        const collision = bubbles.some((bubble) =>
          overlapsAtPosition(candidateX, candidateY, bubble)
        );
        if (!collision) {
          x = candidateX;
          y = candidateY;
          placed = true;
          break;
        }
      }

      if (!placed) {
        x = randomInRange(0, maxX);
        y = randomInRange(0, maxY);
      }

      bubbles.push({
        el: link,
        x,
        y,
        vx: Math.cos(angle) * speed,
        vy: Math.sin(angle) * speed,
      });
    }

    function resolveBubbleCollisions() {
      const maxX = Math.max(0, window.innerWidth - BUBBLE_WIDTH);
      const maxY = Math.max(0, window.innerHeight - BUBBLE_HEIGHT);
      const epsilon = 0.1;

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

          const centerDx = (a.x + BUBBLE_WIDTH / 2) - (b.x + BUBBLE_WIDTH / 2);
          const centerDy = (a.y + BUBBLE_HEIGHT / 2) - (b.y + BUBBLE_HEIGHT / 2);
          const overlapX = BUBBLE_WIDTH - Math.abs(centerDx);
          const overlapY = BUBBLE_HEIGHT - Math.abs(centerDy);

          if (overlapX <= 0 || overlapY <= 0) {
            continue;
          }

          if (overlapX < overlapY) {
            const direction = centerDx === 0 ? (Math.random() < 0.5 ? -1 : 1) : Math.sign(centerDx);
            const shift = overlapX / 2 + epsilon;
            a.x += shift * direction;
            b.x -= shift * direction;
            const swap = a.vx;
            a.vx = b.vx;
            b.vx = swap;
          } else {
            const direction = centerDy === 0 ? (Math.random() < 0.5 ? -1 : 1) : Math.sign(centerDy);
            const shift = overlapY / 2 + epsilon;
            a.y += shift * direction;
            b.y -= shift * direction;
            const swap = a.vy;
            a.vy = b.vy;
            b.vy = swap;
          }

          a.x = clamp(a.x, 0, maxX);
          a.y = clamp(a.y, 0, maxY);
          b.x = clamp(b.x, 0, maxX);
          b.y = clamp(b.y, 0, maxY);
        }
      }
    }

    function updateBubbles(timestamp) {
      if (!lastTime) {
        lastTime = timestamp;
      }
      const dt = (timestamp - lastTime) / 1000;
      lastTime = timestamp;

      const maxX = Math.max(0, window.innerWidth - BUBBLE_WIDTH);
      const maxY = Math.max(0, window.innerHeight - BUBBLE_HEIGHT);

      for (const bubble of bubbles) {
        bubble.x += bubble.vx * dt;
        bubble.y += bubble.vy * dt;

        if (bubble.x <= 0) {
          bubble.x = 0;
          bubble.vx = Math.abs(bubble.vx);
        } else if (bubble.x >= maxX) {
          bubble.x = maxX;
          bubble.vx = -Math.abs(bubble.vx);
        }

        if (bubble.y <= 0) {
          bubble.y = 0;
          bubble.vy = Math.abs(bubble.vy);
        } else if (bubble.y >= maxY) {
          bubble.y = maxY;
          bubble.vy = -Math.abs(bubble.vy);
        }
      }

      // Multiple passes reduce lingering overlap on multi-bubble contacts.
      for (let pass = 0; pass < 3; pass += 1) {
        resolveBubbleCollisions();
      }

      for (const bubble of bubbles) {
        bubble.el.style.transform = `translate(${bubble.x}px, ${bubble.y}px)`;
      }

      requestAnimationFrame(updateBubbles);
    }

    function handleResize() {
      const maxX = Math.max(0, window.innerWidth - BUBBLE_WIDTH);
      const maxY = Math.max(0, window.innerHeight - BUBBLE_HEIGHT);
      for (const bubble of bubbles) {
        bubble.x = clamp(bubble.x, 0, maxX);
        bubble.y = clamp(bubble.y, 0, maxY);
      }
    }

    for (const bubbleData of BUBBLES) {
      createBubble(bubbleData);
    }

    window.addEventListener("resize", handleResize);
    requestAnimationFrame(updateBubbles);
  </script>
</body>
</html>