class Foo{
static vector<Point> vec[3];
};

vec[0] = { {1,2}, {3,4}}; // contain two points
vec[1] = { {0, 0}};       // contain one point
vec[2] = {};              // empty

vector<Poiint> Foo::vec={Point(1,2,3), Point(4,5,6), Point(8,9,10)};

static vector<Point> vec;

Class Foo{
public:
static int bar;
static class _init{
 public _init(){// do something to bar}
} Initializer;
};

// --- in .cpp
// define 'bar' and 'Initializer'

static vector < vector<Point> > vec;

vec.push_back( {{1,2}, {3,4}} );
vec.push_back( {{0,0}} );
vec.push_back( {{4,5}} );

//
// Declared a typedef to separate the vector row and the whole matrix
// Makes it simpler to traverse each vector row later.  intVals is a
// test class with public integer elements "a" and "b".  The intVals
// class substitutes for the Point type in the OP above.
//
typedef vector<intVals> vec_t;
vector<vec_t> matrix;


int jj;
for (int i = 0; i < 3; i++)
{
   jj = 0;
   for (vec_t::iterator j = matrix[i].begin(); j != matrix[i].end(); j++)
   {
      cout << "Matrix at index: " << i << ", element: " << jj << " a = " << (*j).a;
      cout << " b = " << (*j).b << endl;
      jj++;
   }
}

vec[0] = { {1,2}, {3,4}};

Point v1[2] = {Point(1,2), Point(3,4)};
    Point v2[1] = {Point(0.0)};

vector<Point> Foo::vec[] = {vector<Point>(v1, v1+2), vector<Point>(v2, v2+1), vector<Point>()};

vector<Point> Foo::vec[] = {{Point(1,2), Point(3,4)}, {Point(0,0)}, {}};