Arrow Grid Follow Variable Controls

by smombartz

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Arrow Grid Interaction</title>
  <link rel="stylesheet" href="styles.css">
</head>
<body>
  <div id="controls">
    <form id="settings-form">
      <label>
        SVG Size:
        <input type="number" id="svgSize" value="20" />
      </label>
      <label>
        Grid Gap:
        <input type="number" id="gridGap" value="20" />
      </label>
      <label>
        Max Offset (degrees):
        <input type="number" id="maxOffset" value="120" />
      </label>
      <label>
        Smoothing Factor:
        <input type="number" step="0.01" id="smoothingFactor" value="0" />
      </label>
      <label>
        Rotation Speed (seconds):
        <input type="number" step="0.1" id="rotationSpeed" value="0.25" />
      </label>
      <button type="submit">Apply Settings</button>
    </form>
  </div>
  <div id="grid-container"></div>
  <script src="script.js"></script>
</body>
</html>

CSS

/* Controls section styles */
#controls {
  padding: 10px;
  background-color: #f4f4f4;
  border-bottom: 1px solid #ddd;
}

#settings-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

#settings-form label {
  display: flex;
  flex-direction: column;
  font-size: 14px;
}

#settings-form input {
  padding: 5px;
  margin-top: 5px;
  font-size: 14px;
}

#settings-form button {
  padding: 10px 15px;
  font-size: 14px;
  cursor: pointer;
}

/* Grid container styles */
#grid-container {
  display: grid;
  width: 100%;
  height: 100vh;
  gap: 10px; /* Default gap between grid items */
}

/* Grid item styles */
.grid-item {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Arrow SVG styles */
.arrow {
  transition: transform 0.25s ease; /* Smooth rotation */
}

JavaScript

// Default variables
let svgSize = 40; // Size of the SVG (in pixels)
let gridGap = 10; // Gap between grid items (in pixels)
let maxOffset = 30; // Maximum offset (in degrees) for arrows furthest from the mouse
let smoothingFactor = 0.2; // Factor to smooth out the interpolation
let rotationSpeed = 0.5; // Rotation speed (in seconds)

// Initialize the grid and controls
function initializeGrid() {
  const container = document.getElementById('grid-container');
  container.innerHTML = ''; // Clear existing grid

  container.style.gridTemplateColumns = `repeat(auto-fit, minmax(${svgSize}px, 1fr))`;
  container.style.gap = `${gridGap}px`;

  // Populate the grid with enough SVGs to fill the screen
  const totalArrows = 100;
  for (let i = 0; i < totalArrows; i++) {
    const gridItem = document.createElement('div');
    gridItem.classList.add('grid-item');
    gridItem.innerHTML = `
      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 40 40" fill="none" width="${svgSize}" height="${svgSize}" class="arrow">
        <path d="M1 20L20 1L40 20" stroke="currentColor"/>
        <line x1="20" y1="1" x2="20" y2="40" stroke="currentColor"/>
      </svg>`;
    container.appendChild(gridItem);
  }

  // Apply rotation speed to all arrows
  const arrows = document.querySelectorAll('.arrow');
  arrows.forEach((arrow) => {
    arrow.style.transition = `transform ${rotationSpeed}s ease`;
  });
}

// Track the last angle and continuous angle for robust interpolation
let continuousAngle = 0;

// Add mousemove event listener to calculate rotation angle
document.addEventListener('mousemove', (e) => {
  const { clientX, clientY } = e;
  const centerX = window.innerWidth / 2;
  const centerY = window.innerHeight / 2;

  const dx = clientX - centerX;
  const dy = clientY - centerY;
  let newBaseAngle = Math.atan2(dy, dx) * (180 / Math.PI) + 90;

  const angleDifference = newBaseAngle - (continuousAngle % 360);
  if (angleDifference > 180) {
    newBaseAngle -= 360;
  } else if...