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import { h } from 'preact';
import { useRef, useLayoutEffect } from 'preact/hooks';
export const Links = ({ links, ...props }) => {
const canvas = useRef(null);
useLayoutEffect(() => {
const ctx = canvas.current.getContext('2d');
ctx.lineWidth = 4;
ctx.lineCap = 'round';
ctx.lineJoin = 'round';
ctx.strokeStyle = '#696969';
ctx.fillStyle = '#696969';
ctx.shadowBlur = 2;
ctx.shadowOffsetX = 2;
ctx.shadowOffsetY = 4;
ctx.clearRect(0, 0, canvas.current.width, canvas.current.height);
for (const points of links) {
ctx.shadowColor = 'rgba(0,0,0, 0.7)';
ctx.beginPath();
ctx.moveTo(...points[1]);
for (let i = 4; i < points.length; i += 3) {
const [ax, ay] = points[i - 2];
const [bx, by] = points[i - 1];
const [x, y] = points[i];
ctx.bezierCurveTo(ax, ay, bx, by, x, y);
}
ctx.stroke();
const [lx, ly] = points[points.length - 1];
const [tx, ty] = points[0];
const [dx, dy] = [tx - lx, ty - ly];
const [hx, hy] = [dy*0.7, dx*-0.7];
ctx.shadowColor = 'transparent';
ctx.beginPath();
ctx.moveTo(lx + dx*0.8, ly + dy*0.8);
ctx.lineTo(lx - dx*0.5 + hx, ly - dy*0.5 + hy);
ctx.lineTo(lx - dx*0.5 - hx, ly - dy*0.5 - hy);
ctx.fill();
}
});
return (
<canvas {...props} ref={canvas} />
);
};
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