@jscad/modeling/src/maths/vec3/cross.js

Constructive Solid Geometry (CSG) Library for JSCAD

/**
 * Computes the cross product of the given vectors (AxB).
 *
 * @param {vec3} out - receiving vector
 * @param {vec3} a - first operand
 * @param {vec3} b - second operand
 * @returns {vec3} out
 * @alias module:modeling/maths/vec3.cross
 */
const cross = (out, a, b) => {
  const ax = a[0]
  const ay = a[1]
  const az = a[2]
  const bx = b[0]
  const by = b[1]
  const bz = b[2]

  out[0] = ay * bz - az * by
  out[1] = az * bx - ax * bz
  out[2] = ax * by - ay * bx
  return out
}

module.exports = cross