@fimbul-works/vec/dist/cjs/2d/reflect-2d.js

A comprehensive TypeScript vector math library providing 2D, 3D, and 4D vector operations with a focus on performance and type safety.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.reflect2D = void 0;
const dot_2d_js_1 = require("./dot-2d.js");
/**
 * Reflects the vector across a normal vector.
 * The normal vector should be normalized (unit length).
 * @param {ArrayVector2D} xy - Vector as `[x, y]` to reflect
 * @param {ArrayVector2D} normal - Normal vector to reflect across (must be normalized)
 * @returns {ArrayVector2D} The reflected vector
 */
const reflect2D = (xy, normal) => {
    const dot = (0, dot_2d_js_1.dot2D)(xy, normal);
    return [xy[0] - 2 * dot * normal[0], xy[1] - 2 * dot * normal[1]];
};
exports.reflect2D = reflect2D;