lemon-ngx-trend/esm5/helpers/DOM.helpers.js

ngx-trend Angular component for Lemoncloud

import * as tslib_1 from "tslib";
import { checkForCollinearPoints, getDistanceBetween, moveTo, } from './math.helpers';
export var buildLinearPath = function (data) {
    return data.reduce(function (path, point, index) {
        // The very first instruction needs to be a "move".
        // The rest will be a "line".
        var isFirstInstruction = index === 0;
        var instruction = isFirstInstruction ? 'M' : 'L';
        return "" + path + instruction + " " + point.x + "," + point.y + "\n";
    }, '');
};
export function buildSmoothPath(data, radius) {
    var _a = tslib_1.__read(data), firstPoint = _a[0], otherPoints = _a.slice(1);
    return otherPoints.reduce(function (path, point, index) {
        var next = otherPoints[index + 1];
        var prev = otherPoints[index - 1] || firstPoint;
        var isCollinear = next && checkForCollinearPoints(prev, point, next);
        if (!next || isCollinear) {
            // The very last line in the sequence can just be a regular line.
            return path + "\nL " + point.x + "," + point.y;
        }
        var distanceFromPrev = getDistanceBetween(prev, point);
        var distanceFromNext = getDistanceBetween(next, point);
        var threshold = Math.min(distanceFromPrev, distanceFromNext);
        var isTooCloseForRadius = threshold / 2 < radius;
        var radiusForPoint = isTooCloseForRadius ? threshold / 2 : radius;
        var before = moveTo(prev, point, radiusForPoint);
        var after = moveTo(next, point, radiusForPoint);
        return [
            path,
            "L " + before.x + "," + before.y,
            "S " + point.x + "," + point.y + " " + after.x + "," + after.y,
        ].join('\n');
    }, "M " + firstPoint.x + "," + firstPoint.y);
}
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