How to apply multiple boundary conditions

[diehlpk]

In all the examples, it seems only one boundary condition with multiple planes is applied

  CabanaPD::RegionBoundary plane1( low_x, high_x, low_y - dy, low_y + dy,
                                         low_z, high_z );
        CabanaPD::RegionBoundary plane2( low_x, high_x, high_y - dy,
                                         high_y + dy, low_z, high_z );
        std::vector<CabanaPD::RegionBoundary> planes = { plane1, plane2 };
        auto bc =
            createBoundaryCondition( CabanaPD::ForceCrackBranchBCTag{},
                                     exec_space{}, *particles, planes, b0 );

How can I apply to boundary conditions with different b0 values?

I want to apply one boundary condition with b0 and -b0 on the top and bottom of the geometry.

auto cabana_pd = CabanaPD::createSolverFracture<device_type>(
            inputs, particles, force_model, bc, prenotch );

It seems that bc can only be one object derived from createBoundaryCondition and there is no option to provide a vector.

[streeve]

I just pushed an update for #33 - the crack branching BC does exactly that. We have plans to generalize boundary conditions in general for dynamic and/or different values for different sets of particles along the lines of what you suggest (which will clean up what I just added quite a bit).

I mostly want to make sure that what we're doing is performant: fusing each BC rather than applying each one separately is the goal.