@liammartens/svg-path-properties/lib/linear.js

Calculate the length for an SVG path, to use it with node or a Canvas element

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.LinearPosition = void 0;
class LinearPosition {
    constructor(x0, x1, y0, y1) {
        this.getTotalLength = () => {
            return Math.sqrt(Math.pow(this.x0 - this.x1, 2) + Math.pow(this.y0 - this.y1, 2));
        };
        this.getPointAtLength = (pos) => {
            let fraction = pos /
                Math.sqrt(Math.pow(this.x0 - this.x1, 2) + Math.pow(this.y0 - this.y1, 2));
            fraction = Number.isNaN(fraction) ? 1 : fraction;
            const newDeltaX = (this.x1 - this.x0) * fraction;
            const newDeltaY = (this.y1 - this.y0) * fraction;
            return { x: this.x0 + newDeltaX, y: this.y0 + newDeltaY };
        };
        this.getTangentAtLength = (_) => {
            const module = Math.sqrt((this.x1 - this.x0) * (this.x1 - this.x0) +
                (this.y1 - this.y0) * (this.y1 - this.y0));
            return {
                x: (this.x1 - this.x0) / module,
                y: (this.y1 - this.y0) / module,
            };
        };
        this.getPropertiesAtLength = (pos) => {
            const point = this.getPointAtLength(pos);
            const tangent = this.getTangentAtLength(pos);
            return { x: point.x, y: point.y, tangentX: tangent.x, tangentY: tangent.y };
        };
        this.x0 = x0;
        this.x1 = x1;
        this.y0 = y0;
        this.y1 = y1;
    }
}
exports.LinearPosition = LinearPosition;