How Do I Implement Snake Body Movement in a Game Using Grid-Snapped or Free Positioning Techniques?

Chain the Movement of the Snake's Body

In snake games, the snake's body segments should follow the head's path. There are two primary approaches to implementing this movement.

Snakes Snapped to a Grid:

1. Maintain a list of tuples representing the positions of the body segments in a grid.
2. When the snake moves, add the new head position to the beginning of the list and remove the tail (last item).

Snakes with Free Positioning:

1. Track the snake's head positions as it moves.
2. Compute the Euclidean distance between the last body segment and positions in the track.
3. When a position with a sufficient distance is found, add it to the body list as a new segment.

Implementing the Movement:

The following Python code incorporates these approaches into a snake game:

Grid-Snapped Snake:

snake_x, snake_y = WIDTH//2, HEIGHT//2
body = []
move_x, move_y = (1, 0)
food_x, food_y = new_food(body)

run = True
while run:
    # [...]
    body.insert(0, (snake_x, snake_y))
    snake_x = (snake_x + move_x) % WIDTH
    snake_y = (snake_y + move_y) % HEIGHT
    if body[0] == food_x and body[1] == food_y:
        food_x, food_y = new_food(body)
        body.append((snake_x, snake_y))
    # [...]

Free-Positioning Snake:

snake_x, snake_y = WIDTH//2, HEIGHT//2
track = [(WIDTH//2, HEIGHT//2)]
body = []
move_x, move_y = (1, 0)
food_x, food_y = new_food(track)

run = True
while run:
    # [...]
    track.insert(0, (snake_x, snake_y))
    snake_x = (snake_x + move_x) % WIDTH
    snake_y = (snake_y + move_y) % HEIGHT
    body = create_body(track, length, distance)
    # [...]

Conclusion:

Depending on your desired game style, you can choose the appropriate approach for connecting the snake's body segments. The provided Python code demonstrates both implementations.

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