code: function multiply(a, b, dst) {
    dst = dst || new VecType(3);
  
    dst[0] = a[0] * b[0];
    dst[1] = a[1] * b[1];
    dst[2] = a[2] * b[2];
  
    return dst;
  }
docs: Multiplies a vector by another vector (component-wise); assumes a and
  b have the same length.
  @param {module:twgl/v3.Vec3} a Operand vector.
  @param {module:twgl/v3.Vec3} b Operand vector.
  @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created..
  @return {module:twgl/v3.Vec3} The vector of products of entries of a and
  b.
  @memberOf module:twgl/v3