Updated Length

BlankProjectTemplate/src/Food.py

@@ -27,8 +27,6 @@ class Food():
     #  @param location is a list that gives the location of present food
     #  @param screenSize is the size of the screen
     def redraw_food(self, x, y, location,screenSize):
-        if( abs(x - location[0]) < 15 and abs(y - location[1]) < 15):
+        if(abs(x - location[0]) < 15 and abs(y - location[1]) < 15):
             location[0] = randint(0, screenSize - self.size)
             location[1] = randint(0, screenSize - self.size)
-            return location
-

BlankProjectTemplate/src/Gameplay.py

@@ -13,12 +13,20 @@ size = 20
 
 #velocity and score
 vel = 10
-score = 0
+global a
+
+a = 0
+#defining a list to keep track of snake's head
+snake_loc = []
+
+#variable to increment snake's length, initially it would be 1
+snake_length = 1
 
 #initial x and y coordinates of the snake
 x = randint(0,screenSize - size)
 y = randint(0, screenSize - size)
 
+
 speed = 40
 
 # 0 gives (- direction)
@@ -28,15 +36,18 @@ direction = 0
 axis = 0
 
 score = 0
-location = []
+
+# parameters for initializing food on the screen
+food_location = []
 food_x = randint(0,screenSize - size)
 food_y = randint(0,screenSize - size)
-location = [food_x, food_y]
+food_location = [food_x, food_y]
 
 ##initialize snake
 snake = Snake(size, 0, 20, 0)
 food = Food(size)
 
+
 #Loop through the events as long as the game is running
 run = True 
 while run:
@@ -66,6 +77,8 @@ while run:
     else:
         x += vel*snake.direct
 
+
+    
     #Boundary conditions for snake hitting window edge
     if x < 0:
         #x = 0
@@ -80,22 +93,37 @@ while run:
         #x = 500 - size
         x = 0
 
-    #consumption of food block  
-    food.redraw_food(x, y, location, screenSize)
-
-    if(abs(x - location[0]) < 15 and abs(y - location[1]) < 15):
-        score += 1
+    if(abs(x - food_location[0]) < 15 and abs(y - food_location[1]) < 15):
+        score += 10
         print(score)
-         
+        snake_length += 5
+
+
+        
     win.fill(white)
 
+    #consumption of food block
+    food.redraw_food(x, y, food_location, screenSize)
+
+
+
+    snake_head = []
+    snake_head.append(x)
+    snake_head.append(y)
+
+    snake_loc.append(snake_head)
+    
     #Draw food item
-    food.draw_food(location)
+    food.draw_food(food_location)
+
+    
+    if (len(snake_loc)) > snake_length:
+        del snake_loc[0]
     
-    #food.update_score(x,y,location, score)
+    #food.update_score(x,y,food_location, score)
     
     #Draw snake
-    snake.draw(x,y)
+    snake.draw(snake_loc)
 
     #update display
     pygame.display.update()

BlankProjectTemplate/src/Snake.py

@@ -23,8 +23,9 @@ class Snake():
     ## @brief Draw method uses pygame to draw the snake object
     #  @param x The x-coordinate where the block should be drawn 
     #  @param y The y-coordinate where the block should be drawn
-    def draw(self,x,y):
-        pygame.draw.rect(win, red , (x,y, self.size, self.size))
+    def draw(self,snake_loc):
+        for x,y in snake_loc:
+            pygame.draw.rect(win, red , [x,y, self.size, self.size])