def predictions_center_on_focus_body(self, focus_body):
for i in range(len(self.future_positions)):
future_offset = Calc.subtract_vector2(Render.offset,
Render.calc_offset(focus_body.future_positions[i]))
self.future_positions[i] = Calc.subtract_vector2(self.future_positions[i],
future_offset)
