@woosh/meep-engine/src/core/geom/3d/plane/plane3_normalize.js

Pure JavaScript game engine. Fully featured and production ready.

import { v3_length } from "../../vec3/v3_length.js";

/**
 * Normalizes plane representation.
 * Note plane normal must have a non-zero length.
 * @param {number[]} destination
 * @param {number} destination_offset
 * @param {number} x plane normal X
 * @param {number} y plane normal Y
 * @param {number} z plane normal Z
 * @param {number} w planar offset constant
 */
export function plane3_normalize(
    destination, destination_offset,
    x, y, z, w
) {
    // compute vector length
    const length = v3_length(x, y, z);

    const inverse_length = 1.0 / length;

    // apply normalization
    destination[destination_offset] = x * inverse_length;
    destination[destination_offset + 1] = y * inverse_length;
    destination[destination_offset + 2] = z * inverse_length;
    destination[destination_offset + 3] = w * inverse_length;
}