@antv/x6
Version:
JavaScript diagramming library that uses SVG and HTML for rendering
23 lines • 1.03 kB
JavaScript
import { Path, Point } from '../../geometry';
export const loop = (sourcePoint, targetPoint, routePoints, options = {}) => {
const fix = routePoints.length === 3 ? 0 : 1;
const p1 = Point.create(routePoints[0 + fix]);
const p2 = Point.create(routePoints[2 + fix]);
const center = Point.create(routePoints[1 + fix]);
if (!Point.equals(sourcePoint, targetPoint)) {
const middle = new Point((sourcePoint.x + targetPoint.x) / 2, (sourcePoint.y + targetPoint.y) / 2);
const angle = middle.angleBetween(Point.create(sourcePoint).rotate(90, middle), center);
if (angle > 1) {
p1.rotate(180 - angle, middle);
p2.rotate(180 - angle, middle);
center.rotate(180 - angle, middle);
}
}
const pathData = `
M ${sourcePoint.x} ${sourcePoint.y}
Q ${p1.x} ${p1.y} ${center.x} ${center.y}
Q ${p2.x} ${p2.y} ${targetPoint.x} ${targetPoint.y}
`;
return options.raw ? Path.parse(pathData) : pathData;
};
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