Function symbolSize

src/chart/graph/circularLayoutHelper.ts:150–190

(seriesModel, graph, nodeData, r, cx, cy, count)

    },

    symbolSize(seriesModel, graph, nodeData, r, cx, cy, count) {
        let sumRadian = 0;
        _symbolRadiansHalf.length = count;

        const nodeScale = getNodeGlobalScale(seriesModel);

        graph.eachNode(function (node) {
            let symbolSize = getSymbolSize(node);

            // Normally this case will not happen, but we still add
            // some the defensive code (2px is an arbitrary value).
            isNaN(symbolSize) && (symbolSize = 2);
            symbolSize < 0 && (symbolSize = 0);

            symbolSize *= nodeScale;

            let symbolRadianHalf = Math.asin(symbolSize / 2 / r);
            // when `symbolSize / 2` is bigger than `r`.
            isNaN(symbolRadianHalf) && (symbolRadianHalf = PI / 2);
            _symbolRadiansHalf[node.dataIndex] = symbolRadianHalf;
            sumRadian += symbolRadianHalf * 2;
        });

        const halfRemainRadian = (2 * PI - sumRadian) / count / 2;

        let angle = 0;
        graph.eachNode(function (node) {
            const radianHalf = halfRemainRadian + _symbolRadiansHalf[node.dataIndex];

            angle += radianHalf;
            // init circular layout for
            // 1. layout undefined node
            // 2. not fixed node
            (!node.getLayout() || !node.getLayout().fixed)
            && node.setLayout([
                r * Math.cos(angle) + cx,
                r * Math.sin(angle) + cy
            ]);
            angle += radianHalf;
        });
    }
};

export function rotateNodeLabel(