Now that we have snacks, let’s make them worth points.
When Myrtle moves into a cell, we’ll need to be able to check if there is food in a cell or not.
Add the following to World.py:
# World.py
def cell_contains_food(self, cell):
##
if cell == self.food_position:
return True
##
return False
Then add a check for food in the existing function for checking if a cell is empty or not.
Add the following to World.py:
# World.py
def cell_is_empty(self, cell):
##
if self.cell_contains_portal(cell):
return False
if self.cell_contains_obstacle(cell):
return False
+ if self.cell_contains_food(cell):
+ return False
##
return True
Then we’ll use this to check if Myrtle has landed in a cell with food.
Add the following to MoveObject.py:
# MoveObject.py
def move_forward(self):
##
direction = self.heading()
if direction == 90.0: # facing up
new_pos = self.get_up_position()
if direction == 0.0: # facing right
new_pos = self.get_right_position()
if direction == 270.0: # facing down
new_pos = self.get_down_position()
if direction == 180.0: # facing left
new_pos = self.get_left_position()
if self.game.current_world.cell_is_empty(new_pos):
self.current_position = new_pos
self.forward(CELL_WIDTH)
if self.allowed_through_portal:
if self.game.current_world.cell_contains_portal(new_pos):
self.current_position = new_pos
self.forward(CELL_WIDTH)
self.enter_portal()
+ if self.game.current_world.cell_contains_food(new_pos):
+ self.current_position = new_pos
+ self.forward(CELL_WIDTH)
+ self.eat_food()
if self.is_collision():
self.game.score = self.game.score - 5
self.game.update_score()
self.game.myrtle.goto_start_position()
##
pass
If she did land in a cell with food, then we’ll add 5 points.
Add the following to MoveObject.py:
# MoveObject.py
def eat_food(self):
##
self.game.score = self.game.score + 5
self.game.update_score()
self.game.current_world.food.hideturtle()
##
pass
Try moving Myrtle to the food, the score should go up by 5.