Function getCurvenessForEdge

src/chart/helper/multipleGraphEdgeHelper.ts:173–230

(edge, seriesModel, index, needReverse?: boolean)

 * @param index
 */
export function getCurvenessForEdge(edge, seriesModel, index, needReverse?: boolean) {
    const autoCurvenessParams = getAutoCurvenessParams(seriesModel);
    const isArrayParam = zrUtil.isArray(autoCurvenessParams);
    if (!autoCurvenessParams) {
        return null;
    }

    const edgeArray = getEdgeFromMap(edge, seriesModel);
    if (!edgeArray) {
        return null;
    }

    let edgeIndex = -1;
    for (let i = 0; i < edgeArray.length; i++) {
        if (edgeArray[i] === index) {
            edgeIndex = i;
            break;
        }
    }
    // if totalLen is Longer createCurveness
    const totalLen = getTotalLengthBetweenNodes(edge, seriesModel);
    createCurveness(seriesModel, totalLen);

    edge.lineStyle = edge.lineStyle || {};
    // if is opposite edge, must set curvenss to opposite number
    const curKey = getKeyOfEdges(edge.node1, edge.node2, seriesModel);
    const curvenessList = seriesModel.__curvenessList;
    // if pass array no need parity
    const parityCorrection = isArrayParam ? 0 : totalLen % 2 ? 0 : 1;

    if (!edgeArray.isForward) {
        // the opposite edge show outside
        const oppositeKey = getOppositeKey(curKey);
        const len = getEdgeMapLengthWithKey(oppositeKey, seriesModel);
        const resValue = curvenessList[edgeIndex + len + parityCorrection];
        // isNeedReverse, simple, force type need reverse the curveness in the junction of the forword and the opposite
        if (needReverse) {
            // set as array may make the parity handle with the len of opposite
            if (isArrayParam) {
                if (autoCurvenessParams && autoCurvenessParams[0] === 0) {
                    return (len + parityCorrection) % 2 ? resValue : -resValue;
                }
                else {
                    return ((len % 2 ? 0 : 1) + parityCorrection) % 2 ? resValue : -resValue;
                }
            }
            else {
                return (len + parityCorrection) % 2 ? resValue : -resValue;
            }
        }
        else {
            return curvenessList[edgeIndex + len + parityCorrection];
        }
    }
    else {
        return curvenessList[parityCorrection + edgeIndex];
    }
}