def drop_faller(gamestate) -> None:
'''drops faller one row if row is empty, faller landed if empty under new faller, else freeze faller'''
faller_cells = Helper._get_faller_cells(gamestate)
last_faller_cell = faller_cells[2]
if Helper._empty_under_cell(gamestate, last_faller_cell):
gamestate._last_faller_row += 1
for cell in faller_cells[::-1]:
gamestate._board[cell._row+1][cell._col].make_faller_cell(cell._display)
cell.make_empty_cell()
if Faller._landed(gamestate):
Faller._assert_landed_cells(gamestate)
else:
Faller._freeze_faller(gamestate)
def _landed(gamestate) -> bool:
'''returns true if faller landed'''
new_last_faller_cell = Helper._get_faller_cells(gamestate)[2]
empty_under_cell = Helper._empty_under_cell(gamestate, new_last_faller_cell)
return not empty_under_cell
