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f2bfbb5 d56d352 f2bfbb5 d56d352 f2bfbb5 d56d352 f2bfbb5 d56d352 f2bfbb5 d56d352 f2bfbb5 d56d352 f2bfbb5 d56d352 f2bfbb5 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | 'use client';
import { useEffect, useRef, forwardRef, useImperativeHandle } from 'react';
const ParticlesBg = forwardRef((props, ref) => {
const canvasRef = useRef(null);
const targetColorRef = useRef({ r: 56, g: 189, b: 248 });
const currentColorRef = useRef({ r: 56, g: 189, b: 248 });
const hexToRgb = (hex) => {
const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
return result ? {
r: parseInt(result[1], 16),
g: parseInt(result[2], 16),
b: parseInt(result[3], 16)
} : { r: 56, g: 189, b: 248 };
};
useImperativeHandle(ref, () => ({
setAccentColor: (hex) => {
if (hex) {
targetColorRef.current = hexToRgb(hex);
} else {
targetColorRef.current = { r: 56, g: 189, b: 248 };
}
}
}));
useEffect(() => {
const canvas = canvasRef.current;
if (!canvas) return;
const ctx = canvas.getContext('2d');
let animationFrameId;
let particles = [];
let connectionDist = 120;
const BASELINE_AREA = 1920 * 1080;
const BASELINE_PARTICLES = 70;
const BASELINE_DIAGONAL = Math.sqrt(1920 * 1920 + 1080 * 1080);
const BASELINE_CONN_DIST = 120;
const MIN_PARTICLES = 12;
const resize = () => {
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
const area = canvas.width * canvas.height;
const diagonal = Math.sqrt(canvas.width ** 2 + canvas.height ** 2);
const areaRatio = area / BASELINE_AREA;
const targetCount = Math.max(MIN_PARTICLES, Math.round(BASELINE_PARTICLES * areaRatio));
connectionDist = Math.round(BASELINE_CONN_DIST * (diagonal / BASELINE_DIAGONAL));
if (particles.length > targetCount) {
particles.length = targetCount;
} else {
while (particles.length < targetCount) {
particles.push(new Particle());
}
}
};
window.addEventListener('resize', resize);
class Particle {
constructor() {
this.x = Math.random() * canvas.width;
this.y = Math.random() * canvas.height;
this.vx = (Math.random() - 0.5) * 0.8;
this.vy = (Math.random() - 0.5) * 0.8;
this.radius = Math.random() * 2 + 1;
}
update() {
this.x += this.vx;
this.y += this.vy;
if (this.x < 0 || this.x > canvas.width) this.vx *= -1;
if (this.y < 0 || this.y > canvas.height) this.vy *= -1;
}
draw(ctx, color) {
ctx.beginPath();
ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2);
ctx.fillStyle = `rgba(${Math.floor(color.r)}, ${Math.floor(color.g)}, ${Math.floor(color.b)}, 0.5)`;
ctx.fill();
}
}
resize();
const animate = () => {
currentColorRef.current.r += (targetColorRef.current.r - currentColorRef.current.r) * 0.05;
currentColorRef.current.g += (targetColorRef.current.g - currentColorRef.current.g) * 0.05;
currentColorRef.current.b += (targetColorRef.current.b - currentColorRef.current.b) * 0.05;
ctx.clearRect(0, 0, canvas.width, canvas.height);
particles.forEach(p => {
p.update();
p.draw(ctx, currentColorRef.current);
});
for (let i = 0; i < particles.length; i++) {
for (let j = i + 1; j < particles.length; j++) {
const dx = particles[i].x - particles[j].x;
const dy = particles[i].y - particles[j].y;
const dist = Math.sqrt(dx * dx + dy * dy);
if (dist < connectionDist) {
ctx.beginPath();
ctx.moveTo(particles[i].x, particles[i].y);
ctx.lineTo(particles[j].x, particles[j].y);
ctx.strokeStyle = `rgba(${Math.floor(currentColorRef.current.r)}, ${Math.floor(currentColorRef.current.g)}, ${Math.floor(currentColorRef.current.b)}, ${(1 - dist / connectionDist) * 0.4})`;
ctx.lineWidth = 1;
ctx.stroke();
}
}
}
animationFrameId = requestAnimationFrame(animate);
};
animate();
return () => {
window.removeEventListener('resize', resize);
cancelAnimationFrame(animationFrameId);
};
}, []);
return (
<canvas
ref={canvasRef}
style={{
position: 'fixed',
top: 0,
left: 0,
width: '100vw',
height: '100vh',
zIndex: -1,
pointerEvents: 'none'
}}
/>
);
});
ParticlesBg.displayName = 'ParticlesBg';
export default ParticlesBg;
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