function bezier(out, a, b, c, d, t) {
    var inverseFactor = 1 - t;
    var inverseFactorTimesTwo = inverseFactor * inverseFactor;
    var factorTimes2 = t * t;
    var factor1 = inverseFactorTimesTwo * inverseFactor;
    var factor2 = 3 * t * inverseFactorTimesTwo;
    var factor3 = 3 * factorTimes2 * inverseFactor;
    var factor4 = factorTimes2 * t;
    out[0] = a[0] * factor1 + b[0] * factor2 + c[0] * factor3 + d[0] * factor4;
    out[1] = a[1] * factor1 + b[1] * factor2 + c[1] * factor3 + d[1] * factor4;
    out[2] = a[2] * factor1 + b[2] * factor2 + c[2] * factor3 + d[2] * factor4;
    return out;
  }
Performs a bezier interpolation with two control points

@param {vec3} out the receiving vector
@param {ReadonlyVec3} a the first operand
@param {ReadonlyVec3} b the second operand
@param {ReadonlyVec3} c the third operand
@param {ReadonlyVec3} d the fourth operand
@param {Number} t interpolation amount, in the range [0-1], between the two inputs
@returns {vec3} out