我一直在做足球比赛，其中有2辆车试图将球撞成网状。有三件事使我的汽车的旋转/角度不正确，撞到了墙壁（侧面或顶部和底部），一旦开始游戏，旋转就开始向后旋转，并且当进球得分时，汽车将以任何角度继续行驶尽管重新设置了红色角度，但在进入目标之前它保持的角度。我的代码在下面，希望有人可以修复它。
import pygame
import pygame as pg
from pygame.math import Vector2
import time
pygame.font.init()
pygame.init()
WIDTH = 1150
HEIGHT = 800
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Rocket League")
clock = pygame.time.Clock()
start_ticks = pygame.time.get_ticks()
bgimg = pygame.image.load("Football_pitch.png")
REDGOAL = pg.Surface((50, 150), pg.SRCALPHA)
REDGOAL.fill((255, 0, 0))
redgoal_rect = REDGOAL.get_rect(topleft=(0, 340))
redgoal_mask = pg.mask.from_surface(REDGOAL)
BLUEGOAL = pg.Surface((50, 150), pg.SRCALPHA)
BLUEGOAL.fill((0, 0, 255))
bluegoal_rect = REDGOAL.get_rect(topleft=(1100, 340))
bluegoal_mask = pg.mask.from_surface(REDGOAL)
BLUECAR_ORIGINAL = pygame.Surface((50, 30), pygame.SRCALPHA)
pygame.draw.polygon(
BLUECAR_ORIGINAL, (0, 0, 255), [(0, 30), (50, 20), (50,10), (0, 0)])
bluecar = BLUECAR_ORIGINAL
REDCAR_ORIGINAL = pygame.Surface((50, 30), pygame.SRCALPHA)
pygame.draw.polygon(
REDCAR_ORIGINAL, (255, 0, 0), [(0, 30), (50, 20), (50, 10), (0, 0)])
redcar = REDCAR_ORIGINAL
redspeed = 5
bluespeed = 5
ball_x = 575
ball_y = 400
dx = 0
dy = 0
x = 800
y = 500
redscore = 0
bluescore = 0
BALL = pygame.Surface((30, 30), pygame.SRCALPHA)
pygame.draw.circle(BALL, [0,0,0], [15, 15], 15)
ball_pos = Vector2(ball_x, ball_y)
ballrect = BALL.get_rect(center=ball_pos)
ball_vel = Vector2(dx, dy)
ball_mask = pg.mask.from_surface(BALL)
pos_red = Vector2(x,y)
vel_red = Vector2(redspeed,0)
redrect = redcar.get_rect(center=pos_red)
redangle = 180
mask_red = pygame.mask.from_surface(redcar)
mask_ball = pygame.mask.from_surface(BALL)
ballrect = BALL.get_rect(center=ball_pos)
vel_red.rotate_ip(-180)
def redgoal():
ball_vel.x = 0
ball_vel.y = 0
ball_pos.x = 575
ball_pos.y = 400
vel_red.x = redspeed
vel_red.y = 0
pos_red.x = 800
pos_red.y = 370
redangle = 180
vel_red.rotate_ip(-180)
run = True
while run:
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
if y <0:
y = 10
if y > 450:
y = 440
if x > 480:
x = 470
if ballrect.top < 0 and ball_vel.y < 0:
ball_vel.y *= -1
elif ballrect.bottom > screen.get_height() and ball_vel.y > 0:
ball_vel.y *= -1
if ballrect.left < 0 and ball_vel.x < 0:
ball_vel.x *= -1
elif ballrect.right > screen.get_width() and ball_vel.x > 0:
ball_vel.x *= -1
if redrect.top < 0 and vel_red.y < 0:
vel_red.y *= -1
redangle == 0
elif redrect.bottom > screen.get_height() and vel_red.y > 0:
vel_red.y *= -1
redangle == 0
if redrect.left < 0 and vel_red.x < 0:
vel_red.x *= -1
redangle == 0
elif redrect.right > screen.get_width() and vel_red.x > 0:
vel_red.x *= -1
redangle == 0
keys = pygame.key.get_pressed()
if keys[pygame.K_LEFT]:
redangle += 5
vel_red.rotate_ip(-5)
redcar = pygame.transform.rotate(REDCAR_ORIGINAL, redangle)
redrect = redcar.get_rect(center=redrect.center)
mask_red = pygame.mask.from_surface(redcar)
elif keys[pygame.K_RIGHT]:
redangle -= 5
vel_red.rotate_ip(5)
redcar = pygame.transform.rotate(REDCAR_ORIGINAL, redangle)
redrect = redcar.get_rect(center=redrect.center)
mask_red = pygame.mask.from_surface(redcar)
elif keys[pygame.K_UP]:
vel_red.scale_to_length(10)
pos_red += vel_red
redrect.center = pos_red
ball_vel *= .97
ball_pos += ball_vel
ballrect.center = ball_pos
offset_red = redrect[0] - ballrect[0], redrect[1] - ballrect[1]
overlap_red = mask_ball.overlap(mask_red, offset_red)
offset = redgoal_rect[0] - ballrect[0], redgoal_rect[1] - ballrect[1]
redgoaloverlap = ball_mask.overlap(redgoal_mask, offset)
if redgoaloverlap:
redgoal()
elif overlap_red:
ball_vel = Vector2(vel_red) * 1.4
screen.blit(bgimg,(0,0))
screen.blit(BALL, ballrect)
screen.blit(redcar, redrect)
screen.blit(REDGOAL, redgoal_rect)
pygame.display.flip()
pygame.display.update()
pygame.quit()
答案 0 :(得分：2)
如果您想沿边框滑动而不是弹跳，则可以在离开屏幕时将rect的top等属性设置为边框坐标，然后设置pos_red矢量rect.center坐标。速度不会受到影响。
要更改汽车图像的初始旋转，您需要以所需的角度pg.transform.rotate redcar = pg.transform.rotate(REDCAR_ORIGINAL, redangle)。
在程序开始vel_red = Vector2(-redspeed, 0)时，vel_red向量的x分量应为负（指向左侧）。
import pygame as pg
from pygame.math import Vector2
pg.init()
screen = pg.display.set_mode((1150, 800))
clock = pg.time.Clock()
REDCAR_ORIGINAL = pg.Surface((50, 30), pg.SRCALPHA)
pg.draw.polygon(
REDCAR_ORIGINAL, (255, 0, 0), [(0, 30), (50, 20), (50, 10), (0, 0)])
redangle = 180
# Rotate the image/surface before the game starts.
redcar = pg.transform.rotate(REDCAR_ORIGINAL, redangle)
redspeed = 5
pos_red = Vector2(800, 500)
# -redspeed means the vector points to the left.
vel_red = Vector2(-redspeed, 0)
redrect = redcar.get_rect(center=pos_red)
mask_red = pg.mask.from_surface(redcar)
run = True
while run:
for event in pg.event.get():
if event.type == pg.QUIT:
run = False
elif event.type == pg.KEYDOWN:
if event.key == pg.K_r:
# Reset the car to the start position.
redangle = 180
redcar = pg.transform.rotate(REDCAR_ORIGINAL, redangle)
pos_red = Vector2(800, 500)
vel_red = Vector2(-redspeed, 0)
redrect = redcar.get_rect(center=pos_red)
mask_red = pg.mask.from_surface(redcar)
keys = pg.key.get_pressed()
if keys[pg.K_LEFT]:
redangle += 5
vel_red.rotate_ip(-5)
redcar = pg.transform.rotate(REDCAR_ORIGINAL, redangle)
redrect = redcar.get_rect(center=redrect.center)
mask_red = pg.mask.from_surface(redcar)
elif keys[pg.K_RIGHT]:
redangle -= 5
vel_red.rotate_ip(5)
redcar = pg.transform.rotate(REDCAR_ORIGINAL, redangle)
redrect = redcar.get_rect(center=redrect.center)
mask_red = pg.mask.from_surface(redcar)
elif keys[pg.K_UP]:
vel_red.scale_to_length(10)
# Move the car.
pos_red += vel_red
redrect.center = pos_red
# Slide at the borders.
if redrect.top < 0 and vel_red.y < 0:
redrect.top = 0
pos_red = Vector2(redrect.center)
elif redrect.bottom > screen.get_height() and vel_red.y > 0:
redrect.bottom = screen.get_height()
pos_red = Vector2(redrect.center)
if redrect.left < 0 and vel_red.x < 0:
redrect.left = 0
pos_red = Vector2(redrect.center)
elif redrect.right > screen.get_width() and vel_red.x > 0:
redrect.right = screen.get_width()
pos_red = Vector2(redrect.center)
# Blit everything.
screen.fill((30, 110, 30))
screen.blit(redcar, redrect)
rec = pg.Rect(800, 500, 50, 30)
rec.center = (800, 500)
pg.draw.rect(screen, (90, 20, 20), rec, 1) # Start position.
pg.display.flip()
clock.tick(60)
pg.quit()