如何让精灵在撞墙后停止加速？

class Wall(object): def __init__(self,wx,wy): walls.append(self) self.rect= pygame.Rect(wx,wy,30,30) def reset_wall(self): self.active = False walls=[] levels= [['WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW', 'W E W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W W', 'W W W', 'W W W', 'W W W W', 'W W W W', 'W W W W', 'W W W W', 'W WWWWWWWWWWWWWWWWWWW W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W', 'WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW', ]] x=y=0 level=random.choice(levels) for row in level: for col in row: if col=='W': Wall(x,y) if col=='E': end_rect=pygame.Rect(x,y,30,30) x += 30 y+=30 x=0

import os import pygame import time import random vec = pygame.math.Vector2 class player(pygame.sprite.Sprite): def __init__(self): super().__init__() self.image=pygame.image.load("rectmo.png").convert_alpha() self.image=pygame.transform.scale(self.image, (25,100)) self.rect = self.image.get_rect() self.rect.center = (width/2,height/2) self.pos = vec(width/2,height/2) self.vel = vec(0,0) self.acc = vec(0,0) def update(self): user_input=pygame.key.get_pressed() if user_input[pygame.K_d]: self.acc.x=player_acc if user_input[pygame.K_a]: self.acc.x=-player_acc for wall in walls: if self.rect.colliderect(wall.rect)==True: if self.acc.x > 0: self.rect.right=wall.rect.left self.vel.x=0 if self.acc.x < 0: self.rect.left=wall.rect.right self.vel.x=0 if self.acc.y > 0: self.rect.bottom=wall.rect.top self.vel.y=0 if self.pos.y < 0: self.rect.top=wall.rect.bottom self.vel.y=0 if self.rect.colliderect(wall.rect)==False: self.acc = vec(0,0.5) #adds Friction self.acc.x += self.vel.x * player_friction #applying accelerating equation self.vel += self.acc self.pos += self.vel + 0.5 * self.acc self.rect.center = self.pos class Wall(object): def __init__(self,wx,wy): walls.append(self) self.rect= pygame.Rect(wx,wy,30,30) def reset_wall(self): self.active = False os.environ['SDL_VIDEO_CENTERED'] = '1' pygame.init() pygame.display.set_caption('A Game') width = 1366 height= 768 screen=pygame.display.set_mode((width,height)) clock = pygame.time.Clock() walls=[] player_acc=0.5 player_friction=-0.05 rectmo=player() rectmo.rect.x=500 rectmo.rect.y=400 main_colour=(0,0,0) colour=main_colour wall_colour=(255,255,255) current_score=0 levels= [['WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW', 'W E W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W W', 'W W W', 'W W W', 'W W W W', 'W W W W', 'W W W W', 'W W W W', 'W WWWWWWWWWWWWWWWWWWW W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W', 'W W', 'WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW', ]] x=y=0 level=random.choice(levels) for row in level: for col in row: if col=='W': Wall(x,y) if col=='E': end_rect=pygame.Rect(x,y,30,30) x += 30 y+=30 x=0 running=True while running==True: clock.tick(60) for event in pygame.event.get(): if event.type == pygame.QUIT: running = False rectmo.update() if running==True: screen.fill(main_colour) for wall in walls: pygame.draw.rect(screen, wall_colour,wall.rect) pygame.draw.rect(screen,(255,0,0),end_rect) pygame.draw.rect(screen,colour,rectmo.rect) all_sprites_list = pygame.sprite.Group() all_sprites_list.add(rectmo) all_sprites_list.draw(screen) pygame.display.flip()

2条回答

网友

1楼 · 编辑于 2024-09-30 14:37:11

在评估碰撞之前，更改玩家的位置。如果播放器发生冲突，则必须更新self.rect，并且必须将self.pos同步到self.rect.center。对于Instance：

if self.val.x > 0:
    self.rect.right=wall.rect.left
    self.vel.x=0
    self.pos = vec(self.rect.center)

通过测试玩家是否会与墙相交（如果他位于下方1个像素处），评估玩家是否停留在地面上：

test_rect = pygame.Rect(self.rect.x, self.rect.y+1, self.rect.width, self.rect.height) 
if test_rect.colliderect(wall.rect):
   on_ground = True

根据状态设置y方向上的加速度on_ground：

if on_ground:
    self.acc.y = 0
elif self.acc.y == 0:
    self.acc.y = 0.5

方法update：

class player(pygame.sprite.Sprite):
    # [...]

    def update(self):

        user_input=pygame.key.get_pressed()

        self.acc.x = 0
        if user_input[pygame.K_d]:
            self.acc.x=player_acc
        if user_input[pygame.K_a]:
            self.acc.x=-player_acc

        self.vel.x = self.vel.x * 0.95 + self.acc.x
        self.vel.y += self.acc.y
        self.pos += self.vel
        self.rect.center = self.pos

        on_ground = False
        for wall in walls:
            if self.rect.colliderect(wall.rect)==True:
                if self.vel.x > 0:
                    self.rect.right=wall.rect.left
                    self.vel.x=0
                    self.pos = vec(self.rect.center)
                if self.vel.x < 0:
                    self.rect.left=wall.rect.right
                    self.vel.x=0
                    self.pos = vec(self.rect.center)
                if self.vel.y > 0:
                    self.rect.bottom=wall.rect.top
                    self.vel.y=0
                    self.pos = vec(self.rect.center)
                if self.vel.y < 0:
                    self.rect.top=wall.rect.bottom
                    self.vel.y=0
                    self.pos = vec(self.rect.center)

            test_rect = pygame.Rect(self.rect.x, self.rect.y+1, self.rect.width, self.rect.height) 
            if test_rect.colliderect(wall.rect):
                on_ground = True

        if on_ground:
            self.acc.y = 0
        elif self.acc.y == 0:
            self.acc.y = 0.5

网友

2楼 · 编辑于 2024-09-30 14:37:11

只要在精灵与墙碰撞时将self.vel和self.acc变量设置为vec（0，0）。应该可以了。。。希望这有帮助

为避免位置重叠：

main_loop():
    move_sprite()
    r = mySprite.rect
    if r.colliderect(myWall.rect):
        mySprite.vel, mySprite.acc = vec(0, 0), vec(0, 0)
        # Test which wall he is hitting:
        left = [r.topleft, r.midleft, r.bottomleft]
        for point in left:
            if myWall.rect.collideppoint(point):
                r.left = myWall.rect.right  # Sets the sprite outside of the wall
    pygame.display.flip()

这应该行得通。确保在测试墙碰撞之前移动精灵。否则，您可能会遇到一些小故障，精灵会进进出出墙。我只编写了测试左侧墙的代码，但您可以在pygame文档中找到所需的任何内容：

https://www.pygame.org/docs/ref/rect.html

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