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36 lines
1004 B
JavaScript
36 lines
1004 B
JavaScript
/**
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* @fileOverview extend quadraticCurve
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* model configurable:
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* cpd control point distance detail {number} could be 0 ~ 1
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* @author huangtonger@aliyun.com
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*/
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const G6 = require('@antv/g6');
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const Util = G6.Util;
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G6.registerEdge('quadraticCurve', {
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getPath(item) {
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const points = item.getPoints();
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const model = item.getModel();
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const start = points[0];
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const source = item.getSource();
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const target = item.getTarget();
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const end = points[points.length - 1];
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const cpd = !Util.isNil(model.cpd) ? model.cpd : 0.5; // 向量方向长度系数
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const v1 = [ (end.x + start.x) * 0.5 - start.x, (end.y + start.y) * 0.5 - start.y ];
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const v2 = [ -v1[1] * cpd, v1[0] * cpd ];
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// 控制点
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const cp = {
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x: v1[0] + v2[0] + start.x,
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y: v1[1] + v2[1] + start.y
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};
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const sp = source.getLinkPoints(cp)[0];
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const tp = target.getLinkPoints(cp)[0];
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return [
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[ 'M', sp.x, sp.y ],
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[ 'Q', cp.x, cp.y, tp.x, tp.y ]
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];
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}
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});
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