mirror of
https://gitee.com/antv/g6.git
synced 2024-12-15 18:11:08 +08:00
32 lines
866 B
JavaScript
32 lines
866 B
JavaScript
/**
|
|
* @fileOverview 拓展二阶贝塞尔曲线
|
|
* @author huangtonger@aliyun.com
|
|
*/
|
|
const G6 = require('@antv/g6');
|
|
|
|
G6.registerEdge('quadraticCurve', {
|
|
getPath(item) {
|
|
const points = item.getPoints();
|
|
const start = points[0];
|
|
const source = item.getSource();
|
|
const target = item.getTarget();
|
|
const end = points[points.length - 1];
|
|
const q = 0.5; // 向量方向长度系数
|
|
const v1 = [ start.x + (end.x - start.x) * q, start.y + (end.y - start.y) * q ];
|
|
const v2 = [ v1[0] - start.x, v1[1] - start.y ];
|
|
const v3 = [ -v2[1], v2[0] ];
|
|
// 控制点
|
|
const cp = {
|
|
x: v3[0] + v2[0] + start.x,
|
|
y: v3[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 ]
|
|
];
|
|
}
|
|
});
|
|
|