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Pygame列表冲突

collision-detection pygame list python

crazicrafter1 · 技术社区 · 7 年前

我在python中创建了一个地图,使用pygame和一个玩家和墙:

import pygame


x = 25
y = 19

collision = [
    [0,0,0,37],#vertical
    [4,23,4,27],
    [12,18,12,25],
    [13,0,13,1],
    [13,4,13,7],
    [13,10,13,11],
    [15,13,15,18],
    [15,23,15,37],
    [19,0,19,13],
    [29,25,29,26],
    [29,29,29,37],
    [35,0,35,9],
    [35,12,35,17],
    [35,21,35,26],
    [35,29,35,37],
    [36,17,36,21],
    [44,0,44,6],
    [44,10,44,17],
    [54,0,54,17],
    [0,0,19,0],#horizontal
    [35,0,46,0],
    [52,0,54,0],
    [13,5,19,5],
    [19,6,24,6],
    [30,6,35,6],
    [0,13,10,13],
    [15,13,21,13],
    [25,13,44,13],
    [35,17,36,17],
    [44,17,54,17],
    [35,21,36,21],
    [4,23,12,23],
    [0,25,4,25],
    [19,25,36,25],
    [4,27,12,27],
    [0,37,35,37],
    [14,12,14,12],#dots
    [11,14,11,14]
]

white = (255,255,255)
black = (0,0,0)
red = (255,0,0)

pygame.init()

screen = pygame.display.set_mode((200,200))
pygame.display.set_caption('Collision')
screen.fill(white)

for list in collision:#draw map
    pygame.draw.line(screen,black,(list[0],list[1]),(list[2],list[3]),1)

pygame.draw.line(screen,red,(x,y),(x,y),1)#draw player

pygame.display.update()

while(True):
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()

        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_w:
                for list in collision:
                    #---START OF EQUATION---#
                    if(list[0]<=list[2] and not(y-1==list[1] and x>=list[0] and x<=list[2])) or (list[0]>list[2] and not(y-1==list[1] and x>=list[2] and x<=list[0])):#updated
                    #---END OF EQUATION---#
                        pygame.draw.line(screen,white,(x,y),(x,y),1)
                        y-=1
                        pygame.draw.line(screen,red,(x,y),(x,y),1)
                        break
            elif event.key == pygame.K_s:
                for list in collision:
                    if(list[0]<=list[2] and not(y+1==list[1] and x>=list[0] and x<=list[2])) or (list[0]>list[2] and not(y+1==list[1] and x>=list[2] and x<=list[0])):#updated
                        pygame.draw.line(screen,white,(x,y),(x,y),1)
                        y+=1
                        pygame.draw.line(screen,red,(x,y),(x,y),1)
                        break
            elif event.key == pygame.K_a:
                for list in collision:
                    if(list[1]<=list[3] and not(x-1==list[0] and y>=list[1] and y<=list[3])) or (list[1]>list[3] and not(x-1==list[0] and y>=list[3] and y<=list[1])):#updated
                        pygame.draw.line(screen,white,(x,y),(x,y),1)
                        x-=1
                        pygame.draw.line(screen,red,(x,y),(x,y),1)
                        break
            elif event.key == pygame.K_d:
                for list in collision:
                    if(list[1]<=list[3] and not(x+1==list[0] and y>=list[1] and y<=list[3])) or (list[1]>list[3] and not(x+1==list[0] and y>=list[3] and y<=list[1])):#updated
                        pygame.draw.line(screen,white,(x,y),(x,y),1)
                        x+=1
                        pygame.draw.line(screen,red,(x,y),(x,y),1)
                        break
            pygame.display.update()

方程式采用“更容易”的格式:

if (
    list[0]<=list[2]
    and not(

        y-1==list[1]
        and

        x>=list[0]
        and
        x<=list[2])

    )

    or

    (

    list[0]>list[2]
    and not(

        y-1==list[1]
        and

        x>=list[2]
        and
        x<=list[0]

        )

    )

向下检测到按键的地方就是im出现问题的地方。我已经多次测试过这个方法,但它总是导致错误的功能。

每次用户按w/a/s/d时,我都会让我的代码循环遍历“墙”列表,并测试如果没有墙,他们是否能够穿过该空间。假设有一堵这样的墙 here 以红点为玩家。我怎样才能防止玩家通过修改方程式向上或向左移动?

用于测试碰撞的方程式(每个方向都不同,在这种情况下是向上的):

if(list[0]<=list[2] and not(y-1==list[1] and x>=list[0] and x<=list[2])) or (list[0]>list[2] and not(y-1==list[1] and x>=list[2] and x<=list[0]))

1 回复 | 直到 7 年前

furas 7 年前

问题是因为它检查了第一面墙,它可能并没有碰撞,然后它会移动,但它并没有检查其他可以碰撞的墙。

在移动玩家之前,你必须检查所有的墙。

所有的动作几乎都是一样的-你只使用不同的 x , y 检查新位置-所以我创建了一个函数来检查它。

def check_collisions(walls, player_new_x, player_new_y):

    for x1, y1, x2, y2 in walls:
        if x1 <= player_new_x <= x2 and y1 <= player_new_y <= y2:
            print("COLLIDE")
            return True

    return False

完整代码

import pygame

# --- constants --- (UPPER_CASE_NAMES)

WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED   = (255, 0, 0)

FPS = 5

# --- functions --- (lower_case_names)

def check_collisions(walls, player_new_x, player_new_y):

    for x1, y1, x2, y2 in walls:
        if x1 <= player_new_x <= x2 and y1 <= player_new_y <= y2:
            print("COLLIDE")
            return True

    return False

# --- main ---

collision = [
    [0,0,0,37],#vertical
    [4,23,4,27],
    [12,18,12,25],
    [13,0,13,1],
    [13,4,13,7],
    [13,10,13,11],
    [15,13,15,18],
    [15,23,15,37],
    [19,0,19,13],
    [29,25,29,26],
    [29,29,29,37],
    [35,0,35,9],
    [35,12,35,17],
    [35,21,35,26],
    [35,29,35,37],
    [36,17,36,21],
    [44,0,44,6],
    [44,10,44,17],
    [54,0,54,17],
    [0,0,19,0],#horizontal
    [35,0,46,0],
    [52,0,54,0],
    [13,5,19,5],
    [19,6,24,6],
    [30,6,35,6],
    [0,13,10,13],
    [15,13,21,13],
    [25,13,44,13],
    [35,17,36,17],
    [44,17,54,17],
    [35,21,36,21],
    [4,23,12,23],
    [0,25,4,25],
    [19,25,36,25],
    [4,27,12,27],
    [0,37,35,37],
    [14,12,14,12],#dots
    [11,14,11,14]
]

x = 25
y = 19


# - init -

pygame.init()

screen = pygame.display.set_mode((200,200))
screen.fill(WHITE)

# - draws -

for item in collision:
    pygame.draw.line(screen, BLACK, item[:2], item[2:], 1)

pygame.draw.line(screen, RED, (x, y), (x, y), 1)

pygame.display.update()

# - mainloop -

clock = pygame.time.Clock()

while True:

    moved = False

    # - events -

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()

        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_w:
                new_x = x
                new_y = y - 1

                collide = check_collisions(collision, new_x, new_y)

                if not collide:
                    pygame.draw.line(screen, WHITE, (x, y), (x, y), 1)
                    x = new_x
                    y = new_y
                    pygame.draw.line(screen, RED, (x, y), (x, y), 1)

            elif event.key == pygame.K_s:
                new_x = x
                new_y = y + 1

                collide = check_collisions(collision, new_x, new_y)

                if not collide:
                    pygame.draw.line(screen, WHITE, (x, y), (x, y), 1)
                    x = new_x
                    y = new_y
                    pygame.draw.line(screen, RED, (x, y), (x, y), 1)

            elif event.key == pygame.K_a:
                new_x = x - 1
                new_y = y

                collide = check_collisions(collision, new_x, new_y)

                if not collide:
                    pygame.draw.line(screen, WHITE, (x, y), (x, y), 1)
                    x = new_x
                    y = new_y
                    pygame.draw.line(screen, RED, (x, y), (x, y), 1)

            elif event.key == pygame.K_d:
                new_x = x + 1
                new_y = y

                collide = check_collisions(collision, new_x, new_y)

                if not collide:
                    pygame.draw.line(screen, WHITE, (x, y), (x, y), 1)
                    x = new_x
                    y = new_y
                    pygame.draw.line(screen, RED, (x, y), (x, y), 1)

    pygame.display.update()
    clock.tick(FPS) # to display less frame and use less CPU

编辑: 您可以按住按键并移动的版本-无需多次按键

import pygame

# --- constants --- (UPPER_CASE_NAMES)

WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED   = (255, 0, 0)

FPS = 5

# --- functions --- (lower_case_names)

def check_collisions(walls, player_new_x, player_new_y):

    for x1, y1, x2, y2 in walls:
        if x1 <= player_new_x <= x2 and y1 <= player_new_y <= y2:
            print("COLLIDE")
            return True

    return False

# --- main ---

collision = [
    [0,0,0,37],#vertical
    [4,23,4,27],
    [12,18,12,25],
    [13,0,13,1],
    [13,4,13,7],
    [13,10,13,11],
    [15,13,15,18],
    [15,23,15,37],
    [19,0,19,13],
    [29,25,29,26],
    [29,29,29,37],
    [35,0,35,9],
    [35,12,35,17],
    [35,21,35,26],
    [35,29,35,37],
    [36,17,36,21],
    [44,0,44,6],
    [44,10,44,17],
    [54,0,54,17],
    [0,0,19,0],#horizontal
    [35,0,46,0],
    [52,0,54,0],
    [13,5,19,5],
    [19,6,24,6],
    [30,6,35,6],
    [0,13,10,13],
    [15,13,21,13],
    [25,13,44,13],
    [35,17,36,17],
    [44,17,54,17],
    [35,21,36,21],
    [4,23,12,23],
    [0,25,4,25],
    [19,25,36,25],
    [4,27,12,27],
    [0,37,35,37],
    [14,12,14,12],#dots
    [11,14,11,14]
]

x = 25
y = 19


# - init -

pygame.init()

screen = pygame.display.set_mode((200,200))
screen.fill(WHITE)

# - draws -

for item in collision:
    pygame.draw.line(screen, BLACK, item[:2], item[2:], 1)

pygame.draw.line(screen, RED, (x, y), (x, y), 1)

pygame.display.update()

# - mainloop -

clock = pygame.time.Clock()

move_x = 0
move_y = 0

while True:

    # - events -

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()

        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_w:
                move_y = -1

            elif event.key == pygame.K_s:
                move_y = 1

            elif event.key == pygame.K_a:
                move_x = -1

            elif event.key == pygame.K_d:
                move_x = 1

        elif event.type == pygame.KEYUP:
            if event.key == pygame.K_w:
                move_y = 0

            elif event.key == pygame.K_s:
                move_y = 0

            elif event.key == pygame.K_a:
                move_x = 0

            elif event.key == pygame.K_d:
                move_x = 0

    # - update -

    if move_x != 0 or move_y != 0:

        new_x = x + move_x
        new_y = y + move_y

        collide = check_collisions(collision, new_x, new_y)

        if not collide:
            pygame.draw.line(screen, WHITE, (x, y), (x, y), 1)
            x = new_x
            y = new_y
            pygame.draw.line(screen, RED, (x, y), (x, y), 1)


    pygame.display.update()
    clock.tick(FPS) # to display less frame and use less CPU