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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| "use client"; | ||
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| import React, { RefObject, useCallback, useEffect, useRef, useState } from "react"; | ||
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| interface StarProps { | ||
| x: number; | ||
| y: number; | ||
| radius: number; | ||
| opacity: number; | ||
| twinkleSpeed: number | null; | ||
| } | ||
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|
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| interface StarBackgroundProps { | ||
| starDensity?: number; | ||
| allStarsTwinkle?: boolean; | ||
| twinkleProbability?: number; | ||
| minTwinkleSpeed?: number; | ||
| maxTwinkleSpeed?: number; | ||
| className?: string; | ||
| } | ||
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| export const StarsBackground: React.FC<StarBackgroundProps> = ({ | ||
| starDensity = 0.00015, | ||
| allStarsTwinkle = true, | ||
| twinkleProbability = 0.7, | ||
| minTwinkleSpeed = 0.5, | ||
| maxTwinkleSpeed = 1, | ||
| }) => { | ||
| const [stars, setStars] = useState<StarProps[]>([]); | ||
| const canvasRef: RefObject<HTMLCanvasElement> = useRef<HTMLCanvasElement>(null); | ||
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| const generateStars = useCallback( | ||
| (width: number, height: number): StarProps[] => { | ||
| const area = width * height; | ||
| const numStars = Math.floor(area * starDensity); | ||
| return Array.from({ length: numStars }, () => createStar(width, height)); | ||
| }, | ||
| [starDensity, allStarsTwinkle, twinkleProbability, minTwinkleSpeed, maxTwinkleSpeed], | ||
| ); | ||
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| const createStar = (width: number, height: number): StarProps => { | ||
| const shouldTwinkle = allStarsTwinkle || Math.random() < twinkleProbability; | ||
| return { | ||
| x: Math.random() * width, | ||
| y: Math.random() * height, | ||
| radius: Math.random() * 0.05 + 0.5, | ||
| opacity: Math.random() * 0.5 + 0.5, | ||
| twinkleSpeed: shouldTwinkle ? minTwinkleSpeed + Math.random() * (maxTwinkleSpeed - minTwinkleSpeed) : null, | ||
| }; | ||
| }; | ||
|
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| useEffect(() => { | ||
| const updateStars = () => { | ||
| if (canvasRef.current) { | ||
| const canvas = canvasRef.current; | ||
| const ctx = canvas.getContext("2d"); | ||
| if (!ctx) return; | ||
|
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| const { width, height } = canvas.getBoundingClientRect(); | ||
| canvas.width = width; | ||
| canvas.height = height; | ||
| setStars(generateStars(width, height)); | ||
| } | ||
| }; | ||
|
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| updateStars(); | ||
|
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| const resizeObserver = new ResizeObserver(updateStars); | ||
| const currentCanvas = canvasRef.current; // Copy the ref value to a variable | ||
| if (currentCanvas) { | ||
| resizeObserver.observe(currentCanvas); | ||
| } | ||
|
|
||
| return () => { | ||
| if (currentCanvas) { | ||
| resizeObserver.unobserve(currentCanvas); | ||
| } | ||
| }; | ||
| }, [starDensity, allStarsTwinkle, twinkleProbability, minTwinkleSpeed, maxTwinkleSpeed, generateStars]); | ||
|
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| useEffect(() => { | ||
| const canvas = canvasRef.current; | ||
| if (!canvas) return; | ||
|
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| const ctx = canvas.getContext("2d"); | ||
| if (!ctx) return; | ||
|
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| let animationFrameId: number; | ||
|
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| const render = () => { | ||
| ctx.clearRect(0, 0, canvas.width, canvas.height); | ||
| stars.forEach(star => drawStar(ctx, star)); | ||
|
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| animationFrameId = requestAnimationFrame(render); | ||
| }; | ||
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| render(); | ||
|
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| return () => { | ||
| cancelAnimationFrame(animationFrameId); | ||
| }; | ||
| }, [stars]); | ||
|
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| const drawStar = (ctx: CanvasRenderingContext2D, star: StarProps) => { | ||
| ctx.beginPath(); | ||
| ctx.arc(star.x, star.y, star.radius, 0, Math.PI * 2); | ||
| ctx.fillStyle = `rgba(255, 255, 255, ${star.opacity})`; | ||
| ctx.fill(); | ||
|
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| if (star.twinkleSpeed !== null) { | ||
| star.opacity = 0.5 + Math.abs(Math.sin((Date.now() * 0.001) / star.twinkleSpeed) * 0.5); | ||
| } | ||
| }; | ||
|
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| return <canvas ref={canvasRef} className={"min-h-full w-full absolute inset-0 !bg-black"} />; | ||
| }; |
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