@antv/g6
Version:
graph visualization frame work
37 lines (32 loc) • 1 kB
JavaScript
/**
* @fileOverview quadraticCurve
* model configurable:
* cpd - control point distance detail {number} could be 0 ~ 1
* @author huangtonger@aliyun.com
*/
const G6 = require('@antv/g6');
const Util = G6.Util;
G6.registerEdge('quadraticCurve', {
getPath(item) {
const points = item.getPoints();
const model = item.getModel();
const start = points[0];
const source = item.getSource();
const target = item.getTarget();
const end = points[points.length - 1];
const cpd = !Util.isNil(model.cpd) ? model.cpd : 0.5; // 向量方向长度系数
const v1 = [ (end.x + start.x) * 0.5 - start.x, (end.y + start.y) * 0.5 - start.y ];
const v2 = [ -v1[1] * cpd, v1[0] * cpd ];
// 控制点
const cp = {
x: v1[0] + v2[0] + start.x,
y: v1[1] + v2[1] + start.y
};
const sp = source.getLinkPoints(cp)[0];
const tp = target.getLinkPoints(cp)[0];
return [
[ 'M', sp.x, sp.y ],
[ 'Q', cp.x, cp.y, tp.x, tp.y ]
];
}
});