// PreConditions:
// PostConditions: allows submersible object to change current 3D grid level to go up
public void MoveDown(Submersible R1)
{
if (R1.IsPoweredup() && (R1.getCurrentLevel() != 10))
{
R1.setCurrentLevel(R1.getCurrentLevel() + 1);
}
}
// PreConditions:
// PostConditions: allows submersible object to change current 3D grid level to go down
public void MoveUp(Submersible R1)
{
if (R1.IsPoweredup() && (R1.getCurrentLevel() != 0))
{
R1.setCurrentLevel(R1.getCurrentLevel() - 1);
}
}