int nx = 2;
int ny = 4;
for(int i=-nx;i<=nx;i++)
for(int j=-ny;j<=ny;j++)
objects.add(new ModelInstance(new Vect3(i*15+(j%2)*7,0,(j+4)*-15),model));
//objects.add(new Plane(new Vect3(0,0,0),new Vect3(0,1,0),0xFFFFFFFF));
tree = Octree.buildTree(new Vect3(0,0,0),objects);
}