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39 lines
1.4 KiB
39 lines
1.4 KiB
4 months ago
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import { Band } from './band';
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import { PointOptions, BandOptions } from '../types';
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/**
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* Point 比例尺
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*
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* 一种特殊的 band scale，它的 bandWidth 恒为 0。
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*
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* 由于部分选项较为抽象，见下图描述：
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*
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* PO = Padding = PaddingInner
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* domain = ["A", "B", "C"]
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*
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* |<------------------------------------------- range ------------------------------------------->|
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* | | | | |
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* |<--step*PO-->|<--------------step------------->|<--------------step------------->|<--step*PO-->|
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* | | | | |
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* | A B C |
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* |-----------------------------------------------------------------------------------------------|
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*
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* 性能方便较 d3 快出 8 - 9 倍
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*/
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export declare class Point extends Band<PointOptions & BandOptions> {
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protected getDefaultOptions(): {
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domain: any[];
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range: number[];
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align: number;
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round: boolean;
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padding: number;
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unknown: symbol;
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paddingInner: number;
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paddingOuter: number;
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};
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constructor(options?: PointOptions);
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protected getPaddingInner(): number;
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clone(): Point;
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update(options?: PointOptions): void;
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protected getPaddingOuter(): number;
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}
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