"use client"; import React, { useCallback, useEffect, useMemo, useRef, useState, } from "react"; import { clsx, type ClassValue } from "clsx" import { twMerge } from "tailwind-merge" interface FlickeringGridProps extends React.HTMLAttributes { squareSize?: number; gridGap?: number; flickerChance?: number; color?: string; width?: number; height?: number; className?: string; maxOpacity?: number; } function cn(...inputs: ClassValue[]) { return twMerge(clsx(inputs)) } export const FlickeringGrid: React.FC = ({ squareSize = 4, gridGap = 6, flickerChance = 0.3, color = "rgb(0, 0, 0)", width, height, className, maxOpacity = 0.3, ...props }) => { const canvasRef = useRef(null); const containerRef = useRef(null); const [isInView, setIsInView] = useState(false); const [canvasSize, setCanvasSize] = useState({ width: 0, height: 0 }); const memoizedColor = useMemo(() => { const toRGBA = (color: string) => { if (typeof window === "undefined") { return `rgba(0, 0, 0,`; } const canvas = document.createElement("canvas"); canvas.width = canvas.height = 1; const ctx = canvas.getContext("2d"); if (!ctx) return "rgba(255, 0, 0,"; ctx.fillStyle = color; ctx.fillRect(0, 0, 1, 1); const [r, g, b] = Array.from(ctx.getImageData(0, 0, 1, 1).data); return `rgba(${r}, ${g}, ${b},`; }; return toRGBA(color); }, [color]); const setupCanvas = useCallback( (canvas: HTMLCanvasElement, width: number, height: number) => { const dpr = window.devicePixelRatio || 1; canvas.width = width * dpr; canvas.height = height * dpr; canvas.style.width = `${width}px`; canvas.style.height = `${height}px`; const cols = Math.floor(width / (squareSize + gridGap)); const rows = Math.floor(height / (squareSize + gridGap)); const squares = new Float32Array(cols * rows); for (let i = 0; i < squares.length; i++) { squares[i] = Math.random() * maxOpacity; } return { cols, rows, squares, dpr }; }, [squareSize, gridGap, maxOpacity], ); const updateSquares = useCallback( (squares: Float32Array, deltaTime: number) => { for (let i = 0; i < squares.length; i++) { if (Math.random() < flickerChance * deltaTime) { squares[i] = Math.random() * maxOpacity; } } }, [flickerChance, maxOpacity], ); const drawGrid = useCallback( ( ctx: CanvasRenderingContext2D, width: number, height: number, cols: number, rows: number, squares: Float32Array, dpr: number, ) => { ctx.clearRect(0, 0, width, height); ctx.fillStyle = "transparent"; ctx.fillRect(0, 0, width, height); for (let i = 0; i < cols; i++) { for (let j = 0; j < rows; j++) { const opacity = squares[i * rows + j]; ctx.fillStyle = `${memoizedColor}${opacity})`; ctx.fillRect( i * (squareSize + gridGap) * dpr, j * (squareSize + gridGap) * dpr, squareSize * dpr, squareSize * dpr, ); } } }, [memoizedColor, squareSize, gridGap], ); useEffect(() => { const canvas = canvasRef.current; const container = containerRef.current; if (!canvas || !container) return; const ctx = canvas.getContext("2d"); if (!ctx) return; let animationFrameId: number; let gridParams: ReturnType; const updateCanvasSize = () => { const newWidth = width || container.clientWidth; const newHeight = height || container.clientHeight; setCanvasSize({ width: newWidth, height: newHeight }); gridParams = setupCanvas(canvas, newWidth, newHeight); }; updateCanvasSize(); let lastTime = 0; const animate = (time: number) => { if (!isInView) return; const deltaTime = (time - lastTime) / 1000; lastTime = time; updateSquares(gridParams.squares, deltaTime); drawGrid( ctx, canvas.width, canvas.height, gridParams.cols, gridParams.rows, gridParams.squares, gridParams.dpr, ); animationFrameId = requestAnimationFrame(animate); }; const resizeObserver = new ResizeObserver(() => { updateCanvasSize(); }); resizeObserver.observe(container); const intersectionObserver = new IntersectionObserver( ([entry]) => { setIsInView(entry!.isIntersecting); }, { threshold: 0 }, ); intersectionObserver.observe(canvas); if (isInView) { animationFrameId = requestAnimationFrame(animate); } return () => { cancelAnimationFrame(animationFrameId); resizeObserver.disconnect(); intersectionObserver.disconnect(); }; }, [setupCanvas, updateSquares, drawGrid, width, height, isInView]); return (

); };

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