You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1.5 KiB
38 lines
1.5 KiB
4 months ago
|
import { Base } from './base';
|
||
|
|
import { ContinuousOptions, Domain, Range, NiceMethod, TickMethodOptions, Transform } from '../types';
|
||
|
|
/**
|
||
|
|
* Continuous 比例尺 的输入 x 和输出 y 满足：y = a * f(x) + b
|
||
|
|
* 通过函数柯里化和复合函数可以在映射过程中去掉分支，提高性能。
|
||
|
|
* 参考：https://github.com/d3/d3-scale/blob/master/src/continuous.js
|
||
|
|
*/
|
||
|
|
export declare abstract class Continuous<O extends ContinuousOptions> extends Base<O> {
|
||
|
|
/** 实际上将 x 映射为 y 的函数 */
|
||
|
|
protected output: Transform;
|
||
|
|
/** 实际上将 y 映射为 x 的函数 */
|
||
|
|
protected input: Transform;
|
||
|
|
/**
|
||
|
|
* 根据比例尺 和 options 选择对应的 transform 和 untransform 函数
|
||
|
|
* y = a * f(x) + b
|
||
|
|
* x = a * f'(y) + b
|
||
|
|
* @returns [f(x), f'(y)]
|
||
|
|
*/
|
||
|
|
protected abstract chooseTransforms(): Transform[];
|
||
|
|
protected getDefaultOptions(): O;
|
||
|
|
/**
|
||
|
|
* y = interpolate(normalize(clamp(transform(x))))
|
||
|
|
*/
|
||
|
|
map(x: Domain<O>): any;
|
||
|
|
/**
|
||
|
|
* x = transform(clamp(interpolate(normalize(y))))
|
||
|
|
*/
|
||
|
|
invert(x: Range<O>): any;
|
||
|
|
protected nice(): void;
|
||
|
|
getTicks(): (number | Date)[];
|
||
|
|
protected getTickMethodOptions(): TickMethodOptions;
|
||
|
|
protected chooseNice(): NiceMethod<number | Date>;
|
||
|
|
protected rescale(): void;
|
||
|
|
protected chooseClamp(transform: Transform): (x: number) => number;
|
||
|
|
protected composeOutput(transform: Transform, clamp: Transform): void;
|
||
|
|
protected composeInput(transform: Transform, untransform: Transform, clamp: Transform): void;
|
||
|
|
}
|