code: function mulScalar(v, k, dst) {
    dst = dst || new VecType(3);
  
    dst[0] = v[0] * k;
    dst[1] = v[1] * k;
    dst[2] = v[2] * k;
  
    return dst;
  }
docs: Mutiplies a vector by a scalar.
  @param {module:twgl/v3.Vec3} v The vector.
  @param {number} k The scalar.
  @param {module:twgl/v3.Vec3} [dst] vector to hold result. If not new one is created..
  @return {module:twgl/v3.Vec3} dst.
  @memberOf module:twgl/v3