ASSISTANT
To ensure that pieces in the Tetris game drop down the grid, I've reviewed the game loop in detail. I'll provide an updated version of the code with additional clarity on how the piece dropping mechanism is implemented. Let's also make sure that the drop logic and other basic game functions such as drawing, movement, and collisions work correctly.
Here's an adjusted implementation with detailed explanations:
```python
import pygame
import random
# Initialize Pygame
pygame.init()
# Screen dimensions
SCREEN_WIDTH = 300
SCREEN_HEIGHT = 600
BLOCK_SIZE = 30
# Grid dimensions
GRID_WIDTH = SCREEN_WIDTH // BLOCK_SIZE
GRID_HEIGHT = SCREEN_HEIGHT // BLOCK_SIZE
# Colors
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
RED = (255, 0, 0)
GREEN = (0, 255, 0)
BLUE = (0, 0, 255)
YELLOW = (255, 255, 0)
CYAN = (0, 255, 255)
MAGENTA = (255, 0, 255)
ORANGE = (255, 165, 0)
# Shapes and their colors
SHAPES = [
[
[[1, 1, 1, 1]],
[[1], [1], [1], [1]]
],
[
[[1, 0, 0], [1, 1, 1]],
[[1, 1], [1, 0], [1, 0]],
[[1, 1, 1], [0, 0, 1]],
[[0, 1], [0, 1], [1, 1]]
],
[
[[0, 0, 1], [1, 1, 1]],
[[1, 0], [1, 0], [1, 1]],
[[1, 1, 1], [1, 0, 0]],
[[1, 1], [0, 1], [0, 1]]
],
[
[[1, 1], [1, 1]]
],
[
[[0, 1, 1], [1, 1, 0]],
[[1, 0], [1, 1], [0, 1]]
],
[
[[1, 1, 1], [0, 1, 0]],
[[0, 1], [1, 1], [0, 1]],
[[0, 1, 0], [1, 1, 1]],
[[1, 0], [1, 1], [1, 0]]
],
[
[[1, 1, 0], [0, 1, 1]],
[[0, 1], [1, 1], [1, 0]]
]
]
SHAPE_COLORS = [CYAN, BLUE, ORANGE, YELLOW, GREEN, MAGENTA, RED]
# Function to create grid
def create_grid(locked_positions={}):
grid = [[BLACK for _ in range(GRID_WIDTH)] for _ in range(GRID_HEIGHT)]
for (x, y) in locked_positions:
grid[y][x] = locked_positions[(x, y)]
return grid
# Function to draw gridlines
def draw_gridlines(screen):
for y in range(GRID_HEIGHT):
for x in range(GRID_WIDTH):
pygame.draw.rect(screen, WHITE, (x * BLOCK_SIZE, y * BLOCK_SIZE, BLOCK_SIZE, BLOCK_SIZE), 1)
# Class to represent each shape
class Shape:
def __init__(self, x, y, shape):
self.x = x
self.y = y
self.shape = shape
self.color = random.choice(SHAPE_COLORS)
self.rotation = 0
def get_formatted_shape(self):
return self.shape[self.rotation % len(self.shape)]
def convert_shape_format(shape):
positions = []
format_shape = shape.get_formatted_shape()
for y, line in enumerate(format_shape):
for x, value in enumerate(line):
if value:
positions.append((shape.x + x, shape.y + y))
return positions
def valid_space(shape, grid):
accepted_positions = [[(x, y) for x in range(GRID_WIDTH) if grid[y][x] == BLACK] for y in range(GRID_HEIGHT)]
accepted_positions = [x for sublist in accepted_positions for x in sublist]
formatted_shape = convert_shape_format(shape)
for pos in formatted_shape:
if pos not in accepted_positions:
if pos[1] >= 0: # Ignore positions above the grid
return False
return True
def check_lost(positions):
for pos in positions:
_, y = pos
if y < 1:
return True
return False
def get_shape():
return Shape(5, 0, random.choice(SHAPES))
def draw_window(screen, grid):
screen.fill(BLACK)
for y in range(GRID_HEIGHT):
for x in range(GRID_WIDTH):
pygame.draw.rect(screen, grid[y][x], (x * BLOCK_SIZE, y * BLOCK_SIZE, BLOCK_SIZE, BLOCK_SIZE), 0)
draw_gridlines(screen)
pygame.display.update()
def clear_rows(grid, locked_positions):
increment = 0
for i in range(len(grid) - 1, -1, -1):
row = grid[i]
if BLACK not in row: # This means the row is completely filled
increment += 1
# Remove the row
ind = i
for j in range(len(row)):
try:
del locked_positions[(j, i)]
except ValueError:
pass
# Shift every row down
if increment > 0:
# Move rows down by the number of cleared rows
for key in sorted(list(locked_positions), key=lambda position: position[1])[::-1]:
x, y = key
if y < ind:
new_key = (x, y + increment)
locked_positions[new_key] = locked_positions.pop(key)
return increment
def main():
screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pygame.display.set_caption('Tetris')
locked_positions = {}
grid = create_grid(locked_positions)
clock = pygame.time.Clock()
fall_speed = 0.5
current_piece = get_shape()
next_piece = get_shape()
change_piece = False
running = True
while running:
grid = create_grid(locked_positions)
# Create drop mechanism
fall_time = 0
while fall_time <= 500: # 500ms between each drop, can be set to fall_speed
fall_time += clock.tick() # Add time since last tick
if fall_time > 500: # Time to drop the piece
fall_time = 0
current_piece.y += 1
if not valid_space(current_piece, grid) and current_piece.y > 0:
current_piece.y -= 1
change_piece = True
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
current_piece.x -= 1
if not valid_space(current_piece, grid):
current_piece.x += 1
if event.key == pygame.K_RIGHT:
current_piece.x += 1
if not valid_space(current_piece, grid):
current_piece.x -= 1
if event.key == pygame.K_DOWN:
# Attempt to drop the piece faster
current_piece.y += 1
if not valid_space(current_piece, grid):
current_piece.y -= 1
if event.key == pygame.K_UP:
current_piece.rotation = (current_piece.rotation + 1) % len(current_piece.shape)
if not valid_space(current_piece, grid):
current_piece.rotation = (current_piece.rotation - 1) % len(current_piece.shape)
shape_pos = convert_shape_format(current_piece)
# Draw the current piece on the screen
for i in range(len(shape_pos)):
x, y = shape_pos[i]
if y > -1: # Not above the screen
grid[y][x] = current_piece.color
if change_piece:
for pos in shape_pos:
p = (pos[0], pos[1])
locked_positions[p] = current_piece.color
current_piece = next_piece
next_piece = get_shape()
change_piece = False
# Clear rows
clear_rows(grid, locked_positions)
# Check for game over
if check_lost(locked_positions):
running = False
draw_window(screen, grid)
pygame.quit()
if __name__ == "__main__":
main()
```
### Key Adjustments:
1. **Piece Dropping Logic:** The game loop now properly integrates a dropping timer (`fall_time`) that accumulates over time until it surpasses a defined amount (`500 ms` here) at which point the current piece will drop by one row. This is simulated as `fall_speed`.
2. **Event Handling:** Key events are processed allowing the player to move pieces left, right, rotate, and increase the drop speed by manually holding down the down arrow key.
3. **Piece Locking and Replacement:** Once a piece cannot move down any further, it becomes locked and a new piece is spawned, clearing full rows if necessary.
4. **Game Over Check:** After each new piece is created, the system checks if it can be placed. If not, the game recognizes this as a game over condition.
Feel free to modify the `fall_speed` or the timing logic to adjust the game difficulty and responsiveness.