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Pygame窗口上的灰色条带

分类：编程问答

如何解决Pygame窗口上的灰色条带

Pygame Image of Gray Bands

我正在关注TechWithTim的A *路径查找算法教程，该教程基于Pygame。当我运行程序时，我得到了带有灰色条纹和奇怪叠加层的窗口。我确定我的代码没有错误。使用pygame时，还有其他人面对过吗？我将为解决此问题提供任何建议。谢谢。

代码：

import pygame
import math
from queue import PriorityQueue

pygame.init()

WIDTH = 800
WIN = pygame.display.set_mode((WIDTH,WIDTH))
pygame.display.set_caption("A* Path Finding Algorithm")

RED = (255,0)
GREEN = (0,255,0)
BLUE = (0,255)
YELLOW = (255,0)
WHITE = (255,255)
BLACK = (0,0)
PURPLE = (128,128)
ORANGE = (255,165,0)
GREY = (128,128,128)
TURQUOISE = (64,224,208)


class Spot:
    def __init__(self,row,col,width,total_rows):
        self.row = row
        self.col = col
        self.x = row * width
        self.y = col * width
        self.color = WHITE
        self.neighbors = []
        self.width = width
        self.total_rows = total_rows

    def get_pos(self):
        return self.row,self.col

    def is_closed(self):
        return self.color == RED

    def is_open(self):
        return self.color == GREEN

    def is_barrier(self):
        return self.color == BLACK

    def is_start(self):
        return self.colour == ORANGE

    def is_end(self):
        return self.color == TURQUOISE

    def reset(self):
        self.color == WHITE

    def make_closed(self):
        self.color = RED

    def make_open(self):
        self.color = GREEN

    def make_barrier(self):
        self.color = BLACK

    def make_start(self):
        self.color = ORANGE

    def make_end(self):
        self.color = TURQUOISE

    def make_path(self):
        self.color = PURPLE

    def draw(self,win):
        pygame.draw.rect(win,self.color,(self.x,self.y,self.width,self.width))

    def update_neighbors(self,grid):
        pass

    def __lt__(self,other):
        return False


def h(p1,p2):
    x1,y1 = p1
    x2,y2 = p2

    return abs(x1 - x2) + abs(y1 - y2)


def make_grid(rows,width):
    grid = []
    gap = width // rows

    for i in range(rows):
        grid.append([])

        for j in range(rows):
            spot = Spot(i,j,gap,rows)
            grid[i].append(spot)

    return grid


def draw_grid(win,rows,width):
    gap = width // rows

    for i in range(rows):
        pygame.draw.line(win,GREY,(0,i * gap),(width,i * gap))

        for j in range(rows):
            pygame.draw.line(win,(j * gap,0),(i * gap,width))


def draw(win,grid,width):
    win.fill(WHITE)

    for row in grid:
        for spot in row:
            spot.draw(win)

    draw_grid(win,width)
    pygame.display.update()


def get_clicked_pos(pos,width):
    gap = width // rows
    y,x = pos

    row = y // gap
    col = x // gap

    return row,col


def main(win,width):
    ROWS = 50
    grid = make_grid(ROWS,width)

    start = None
    end = None

    run = True
    started = False

    while run:

        draw(win,ROWS,width)

        for event in pygame.event.get():

            if event.type == pygame.QUIT:
                run = False

            if started:
                continue

            if pygame.mouse.get_pressed()[0]:  # LEFT
                pos = pygame.mouse.get_pos()
                row,col = get_clicked_pos(pos,width)
                spot = grid[row][col]

                if not start:
                    start = spot
                    start.make_start()

                elif not end:
                    end = spot
                    end.make_end()

                elif spot != end and spot != start:
                    spot.make_barrier()


            elif pygame.mouse.get_pressed()[2]:  # RIGHT
                pass

    pygame.quit()


main(WIN,WIDTH)

解决方法

尝试一下。这对我有用。

import pygame
import math
from queue import PriorityQueue

WIDTH = 800
WIN = pygame.display.set_mode((WIDTH,WIDTH))
pygame.display.set_caption("A* Path Finding Algorithm")

RED = (255,0)
GREEN = (0,255,0)
BLUE = (0,255)
YELLOW = (255,0)
WHITE = (255,255)
BLACK = (0,0)
PURPLE = (128,128)
ORANGE = (255,165,0)
GREY = (128,128,128)
TURQUOISE = (64,224,208)


class Spot:
    def __init__(self,row,col,width,total_rows):
        self.row = row
        self.col = col
        self.x = row * width
        self.y = col * width
        self.color = WHITE
        self.neighbors = []
        self.width = width
        self.total_rows = total_rows

    def get_pos(self):
        return self.row,self.col

    def is_closed(self):
        return self.color == RED

    def is_open(self):
        return self.color == GREEN

    def is_barrier(self):
        return self.color == BLACK

    def is_start(self):
        return self.color == ORANGE

    def is_end(self):
        return self.color == TURQUOISE

    def reset(self):
        self.color = WHITE

    def make_start(self):
        self.color = ORANGE

    def make_closed(self):
        self.color = RED

    def make_open(self):
        self.color = GREEN

    def make_barrier(self):
        self.color = BLACK

    def make_end(self):
        self.color = TURQUOISE

    def make_path(self):
        self.color = PURPLE

    def draw(self,win):
        pygame.draw.rect(
            win,self.color,(self.x,self.y,self.width,self.width))

    def update_neighbors(self,grid):
        self.neighbors = []
        # DOWN
        if self.row < self.total_rows - 1 and not grid[self.row + 1][self.col].is_barrier():
            self.neighbors.append(grid[self.row + 1][self.col])

        if self.row > 0 and not grid[self.row - 1][self.col].is_barrier():  # UP
            self.neighbors.append(grid[self.row - 1][self.col])

        # RIGHT
        if self.col < self.total_rows - 1 and not grid[self.row][self.col + 1].is_barrier():
            self.neighbors.append(grid[self.row][self.col + 1])

        if self.col > 0 and not grid[self.row][self.col - 1].is_barrier():  # LEFT
            self.neighbors.append(grid[self.row][self.col - 1])

    def __lt__(self,other):
        return False


def h(p1,p2):
    x1,y1 = p1
    x2,y2 = p2
    return abs(x1 - x2) + abs(y1 - y2)


def reconstruct_path(came_from,current,draw):
    while current in came_from:
        current = came_from[current]
        current.make_path()
        draw()


def algorithm(draw,grid,start,end):
    count = 0
    open_set = PriorityQueue()
    open_set.put((0,count,start))
    came_from = {}
    g_score = {spot: float("inf") for row in grid for spot in row}
    g_score[start] = 0
    f_score = {spot: float("inf") for row in grid for spot in row}
    f_score[start] = h(start.get_pos(),end.get_pos())

    open_set_hash = {start}

    while not open_set.empty():
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()

        current = open_set.get()[2]
        open_set_hash.remove(current)

        if current == end:
            reconstruct_path(came_from,end,draw)
            end.make_end()
            return True

        for neighbor in current.neighbors:
            temp_g_score = g_score[current] + 1

            if temp_g_score < g_score[neighbor]:
                came_from[neighbor] = current
                g_score[neighbor] = temp_g_score
                f_score[neighbor] = temp_g_score + \
                    h(neighbor.get_pos(),end.get_pos())
                if neighbor not in open_set_hash:
                    count += 1
                    open_set.put((f_score[neighbor],neighbor))
                    open_set_hash.add(neighbor)
                    neighbor.make_open()

        draw()

        if current != start:
            current.make_closed()

    return False


def make_grid(rows,width):
    grid = []
    gap = width // rows
    for i in range(rows):
        grid.append([])
        for j in range(rows):
            spot = Spot(i,j,gap,rows)
            grid[i].append(spot)

    return grid


def draw_grid(win,rows,width):
    gap = width // rows
    for i in range(rows):
        pygame.draw.line(win,GREY,(0,i * gap),(width,i * gap))
        for j in range(rows):
            pygame.draw.line(win,(j * gap,0),width))


def draw(win,width):
    win.fill(WHITE)

    for row in grid:
        for spot in row:
            spot.draw(win)

    draw_grid(win,width)
    pygame.display.update()


def get_clicked_pos(pos,width):
    gap = width // rows
    y,x = pos

    row = y // gap
    col = x // gap

    return row,col


def main(win,width):
    ROWS = 50
    grid = make_grid(ROWS,width)

    start = None
    end = None

    run = True
    while run:
        draw(win,ROWS,width)
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False

            if pygame.mouse.get_pressed()[0]:  # LEFT
                pos = pygame.mouse.get_pos()
                row,col = get_clicked_pos(pos,width)
                spot = grid[row][col]
                if not start and spot != end:
                    start = spot
                    start.make_start()

                elif not end and spot != start:
                    end = spot
                    end.make_end()

                elif spot != end and spot != start:
                    spot.make_barrier()

            elif pygame.mouse.get_pressed()[2]:  # RIGHT
                pos = pygame.mouse.get_pos()
                row,width)
                spot = grid[row][col]
                spot.reset()
                if spot == start:
                    start = None
                elif spot == end:
                    end = None

            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_SPACE and start and end:
                    for row in grid:
                        for spot in row:
                            spot.update_neighbors(grid)

                    algorithm(lambda: draw(win,width),end)

                if event.key == pygame.K_c:
                    start = None
                    end = None
                    grid = make_grid(ROWS,width)

    pygame.quit()


main(WIN,WIDTH)

查看您的代码和我的探访之间的区别 https://www.diffchecker.com/pPs9IJjc

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