Function getEdgeShape

src/chart/tree/TreeView.ts:685–753

(
    layoutOpt: TreeSeriesOption['layout'],
    orient: TreeSeriesOption['orient'],
    curvature: number,
    sourceLayout: TreeNodeLayout,
    targetLayout: TreeNodeLayout
)

}

function getEdgeShape(
    layoutOpt: TreeSeriesOption['layout'],
    orient: TreeSeriesOption['orient'],
    curvature: number,
    sourceLayout: TreeNodeLayout,
    targetLayout: TreeNodeLayout
) {
    let cpx1: number;
    let cpy1: number;
    let cpx2: number;
    let cpy2: number;
    let x1: number;
    let x2: number;
    let y1: number;
    let y2: number;

    if (layoutOpt === 'radial') {
        x1 = sourceLayout.rawX;
        y1 = sourceLayout.rawY;
        x2 = targetLayout.rawX;
        y2 = targetLayout.rawY;

        const radialCoor1 = radialCoordinate(x1, y1);
        const radialCoor2 = radialCoordinate(x1, y1 + (y2 - y1) * curvature);
        const radialCoor3 = radialCoordinate(x2, y2 + (y1 - y2) * curvature);
        const radialCoor4 = radialCoordinate(x2, y2);

        return {
            x1: radialCoor1.x || 0,
            y1: radialCoor1.y || 0,
            x2: radialCoor4.x || 0,
            y2: radialCoor4.y || 0,
            cpx1: radialCoor2.x || 0,
            cpy1: radialCoor2.y || 0,
            cpx2: radialCoor3.x || 0,
            cpy2: radialCoor3.y || 0
        };
    }
    else {
        x1 = sourceLayout.x;
        y1 = sourceLayout.y;
        x2 = targetLayout.x;
        y2 = targetLayout.y;

        if (orient === 'LR' || orient === 'RL') {
            cpx1 = x1 + (x2 - x1) * curvature;
            cpy1 = y1;
            cpx2 = x2 + (x1 - x2) * curvature;
            cpy2 = y2;
        }
        if (orient === 'TB' || orient === 'BT') {
            cpx1 = x1;
            cpy1 = y1 + (y2 - y1) * curvature;
            cpx2 = x2;
            cpy2 = y2 + (y1 - y2) * curvature;
        }
    }