void PrescribedGradientBCWeakDirichlet :: postInitialize()
{
    bool enforceCornerPeriodicity = false;
    int numSides = 4;
    createTractionMesh(enforceCornerPeriodicity, numSides);
}
void PrescribedGradientBCWeakPeriodic :: postInitialize()
{
	bool enforceCornerPeriodicity = true;
	int numSides = 2;
    createTractionMesh(enforceCornerPeriodicity, numSides);
}