gazeplotter/dist/class/Plot/PlotAxisBreaks/PlotAxisBreaks.js

Gazeplotter is a Svelte application for visualizing eye-tracking data.

export class PlotAxisBreaks extends Array {
    constructor(numberToBreak, numberOfSteps = 10) {
        const { step, length } = PlotAxisBreaks.getSteps(numberToBreak, numberOfSteps);
        super(length);
        for (let i = 0; i < length; i++)
            this[i] = step * i;
    }
    get maxLabel() {
        return this[this.length - 1];
    }
    static getSteps(numberToBreak, numberOfSteps) {
        const step = PlotAxisBreaks.getStep(numberToBreak, numberOfSteps);
        while (step === PlotAxisBreaks.getStep(numberToBreak, numberOfSteps - 1)) {
            numberOfSteps--;
        }
        return {
            step,
            length: numberOfSteps + 1
        };
    }
    static getStep(numberToBreak, numberOfSteps) {
        let res = numberToBreak / numberOfSteps;
        const numOfDigits = (Math.log(res) * Math.LOG10E + 1 | 0) - 1;
        res = Math.ceil(res / (10 ** (numOfDigits)));
        if ((res % 2 === 1 && res % 5 > 0) && res !== 1) {
            res++;
        }
        if (res % 6 === 0 || res % 8 === 0) {
            res = 10;
        }
        return res * (10 ** (numOfDigits));
    }
}