src/coord/polar/AngleAxis.js
function () {
        var axis = this;
        var labelModel = axis.getLabelModel();

        var ordinalScale = axis.scale;
        var ordinalExtent = ordinalScale.getExtent();
        // Providing this method is for optimization:
        // avoid generating a long array by `getTicks`
        // in large category data case.
        var tickCount = ordinalScale.count();

        if (ordinalExtent[1] - ordinalExtent[0] < 1) {
            return 0;
        }

        var tickValue = ordinalExtent[0];
        var unitSpan = axis.dataToCoord(tickValue + 1) - axis.dataToCoord(tickValue);
        var unitH = Math.abs(unitSpan);

        // Not precise, just use height as text width
        // and each distance from axis line yet.
        var rect = textContain.getBoundingRect(
            tickValue, labelModel.getFont(), 'center', 'top'
        );
        var maxH = Math.max(rect.height, 7);

        var dh = maxH / unitH;
        // 0/0 is NaN, 1/0 is Infinity.
        isNaN(dh) && (dh = Infinity);
        var interval = Math.max(0, Math.floor(dh));

        var cache = inner(axis.model);
        var lastAutoInterval = cache.lastAutoInterval;
        var lastTickCount = cache.lastTickCount;

        // Use cache to keep interval stable while moving zoom window,
        // otherwise the calculated interval might jitter when the zoom
        // window size is close to the interval-changing size.
        if (lastAutoInterval != null
            && lastTickCount != null
            && Math.abs(lastAutoInterval - interval) <= 1
            && Math.abs(lastTickCount - tickCount) <= 1
            // Always choose the bigger one, otherwise the critical
            // point is not the same when zooming in or zooming out.
            && lastAutoInterval > interval
        ) {
            interval = lastAutoInterval;
        }
        // Only update cache if cache not used, otherwise the
        // changing of interval is too insensitive.
        else {
            cache.lastTickCount = tickCount;
            cache.lastAutoInterval = interval;
        }

        return interval;
    }
function () {
        var axis = this;
        var labelModel = axis.getLabelModel();

        var ordinalScale = axis.scale;
        var ordinalExtent = ordinalScale.getExtent();
        // Providing this method is for optimization:
        // avoid generating a long array by `getTicks`
        // in large category data case.
        var tickCount = ordinalScale.count();

        if (ordinalExtent[1] - ordinalExtent[0] < 1) {
            return 0;
        }

        var tickValue = ordinalExtent[0];
        var unitSpan = axis.dataToCoord(tickValue + 1) - axis.dataToCoord(tickValue);
        var unitH = Math.abs(unitSpan);

        // Not precise, just use height as text width
        // and each distance from axis line yet.
        var rect = textContain.getBoundingRect(
            tickValue, labelModel.getFont(), 'center', 'top'
        );
        var maxH = Math.max(rect.height, 7);

        var dh = maxH / unitH;
        // 0/0 is NaN, 1/0 is Infinity.
        isNaN(dh) && (dh = Infinity);
        var interval = Math.max(0, Math.floor(dh));

        var cache = inner(axis.model);
        var lastAutoInterval = cache.lastAutoInterval;
        var lastTickCount = cache.lastTickCount;

        // Use cache to keep interval stable while moving zoom window,
        // otherwise the calculated interval might jitter when the zoom
        // window size is close to the interval-changing size.
        if (lastAutoInterval != null
            && lastTickCount != null
            && Math.abs(lastAutoInterval - interval) <= 1
            && Math.abs(lastTickCount - tickCount) <= 1
            // Always choose the bigger one, otherwise the critical
            // point is not the same when zooming in or zooming out.
            && lastAutoInterval > interval
        ) {
            interval = lastAutoInterval;
        }
        // Only update cache if cache not used, otherwise the
        // changing of interval is too insensitive.
        else {
            cache.lastTickCount = tickCount;
            cache.lastAutoInterval = interval;
        }

        return interval;
    }
function ( ) { var axis = this ; var labelModel = axis . getLabelModel ( ) ; var ordinalScale = axis . scale ; var ordinalExtent = ordinalScale . getExtent ( ) ; // Providing this method is for optimization: // avoid generating a long array by `getTicks` // in large category data case. var tickCount = ordinalScale . count ( ) ; if ( ordinalExtent [ 1 ] - ordinalExtent [ 0 ] < 1 ) { return 0 ; } var tickValue = ordinalExtent [ 0 ] ; var unitSpan = axis . dataToCoord ( tickValue + 1 ) - axis . dataToCoord ( tickValue ) ; var unitH = Math . abs ( unitSpan ) ; // Not precise, just use height as text width // and each distance from axis line yet. var rect = textContain . getBoundingRect ( tickValue , labelModel . getFont ( ) , 'center' , 'top' ) ; var maxH = Math . max ( rect . height , 7 ) ; var dh = maxH / unitH ; // 0/0 is NaN, 1/0 is Infinity. isNaN ( dh ) && ( dh = Infinity ) ; var interval = Math . max ( 0 , Math . floor ( dh ) ) ; var cache = inner ( axis . model ) ; var lastAutoInterval = cache . lastAutoInterval ; var lastTickCount = cache . lastTickCount ; // Use cache to keep interval stable while moving zoom window, // otherwise the calculated interval might jitter when the zoom // window size is close to the interval-changing size. if ( lastAutoInterval != null && lastTickCount != null && Math . abs ( lastAutoInterval - interval ) <= 1 && Math . abs ( lastTickCount - tickCount ) <= 1 // Always choose the bigger one, otherwise the critical // point is not the same when zooming in or zooming out. && lastAutoInterval > interval ) { interval = lastAutoInterval ; } // Only update cache if cache not used, otherwise the // changing of interval is too insensitive. else { cache . lastTickCount = tickCount ; cache . lastAutoInterval = interval ; } return interval ; }
Only be called in category axis.
Angle axis uses text height to decide interval

@override
@return {number} Auto interval for cateogry axis tick and label
Only be called in category axis . Angle axis uses text height to decide interval