@woosh/meep-engine/src/core/geom/vec3/v3_dot_array_array.js

Pure JavaScript game engine. Fully featured and production ready.

/**
 *
 * @param {number[]|Float32Array} a
 * @param {number} a_offset
 * @param {number[]|Float32Array} b
 * @param {number} b_offset
 * @returns {number}
 */
export function v3_dot_array_array(
    a, a_offset,
    b, b_offset
) {

    const a_x = a[a_offset];
    const a_y = a[a_offset + 1];
    const a_z = a[a_offset + 2];

    const b_x = b[b_offset];
    const b_y = b[b_offset + 1];
    const b_z = b[b_offset + 2];

    return a_x * b_x + a_y * b_y + a_z * b_z;
}