CSG operations

[Mohamed El-Hamzawy]

 Does CSG operations work on openvdb::Grid<openvdb::Vec2DTree>?

I want to do some csgDifference and csgIntersection on a grid of Vec2D type as mentioned above, but I get an error saying :

terminate called after throwing an instance of 'openvdb::v7_1::TypeError'
  what():  TypeError: signedFloodFill is supported only for signed value grids
Aborted (core dumped).

Is there a way to make that work? or do I have to make my own functions?

code snippet :

template <class GridType>

void make_cube(GridType& grid, int size, const openvdb::Vec3f& c)

{

using ValueT = typename GridType::ValueType;

typename GridType::Accessor accessor = grid.getAccessor();

for (int i = c[0] - size; i <= c[0] + size; i++) {

for (int j = c[1] - size; j <= c[1] + size; j++) {

for (int k = c[2] - size; k <= c[2] + size; k++) {

openvdb::math::Coord voxel_coord = openvdb::math::Coord(i, j, k);

accessor.setValue(voxel_coord, ValueT(-2));

std::cout << i << j << k << std::endl;

}

}

}

}

openvdb::initialize();

// create three initial grids.

FloatGrid::Ptr gridA = FloatGrid::create(1);

FloatGrid::Ptr gridB = FloatGrid::create(1);

FloatGrid::Ptr current_view = tools::csgDifferenceCopy(*gridA, *gridC);

The previous code works fine for floatgrid but fails for vec2d and vec3d grids.

Basically I want to apply csg operations on the first element only for the vec2d grid if possible. What would be the smartest way to do that?