现在我的玩家角色可以向右或向左移动。我已经为我的播放器设置了重力，正如预期的那样，它从屏幕上掉了出来。我已经阅读了许多有关如何使精灵跳跃的文档。然而，他们都用平台来解释它，作为精灵可以降落和移动的基础。为此，他们加载平台图像或使用pygame创建一些图像。但在编写大量代码之前，我已经为我的游戏绘制了一个背景，其中包括地面。所以我不希望为我的游戏创建新的平台(目前(。有没有办法让我的精灵在不使用平台的情况下在我的程序中跳跃？我的想法是将"平台"设置为y轴上的某条线。但是我该怎么做呢？我对任何想法都持开放态度。事先谢谢。我的代码分为 3 个文件：main.py、settings.py 和 Sprite1.py。以下是 main.py：
import pygame
import os
import sys
import time
from pygame import mixer
from Sprite1 import *
from settings import *
'''
Setup
'''
pygame.init()
clock = pygame.time.Clock()
pygame.mixer.music.load('.\sounds\Fairy.mp3')
pygame.mixer.music.play(-1, 0.0)
all_sprites = pygame.sprite.Group()
player = Player(all_sprites)
player.rect.x = 50
player.rect.y = 500
showStartScreen(surface)
'''
Main loop
'''
main = True
while main == True:
background = pygame.image.load(os.path.join('images', 'Bg.png'))
surface.blit(background, (0,0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
main = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT or event.key == ord('a'):
player.control(-steps,0)
if event.key == pygame.K_RIGHT or event.key == ord('d'):
player.control(steps,0)
if event.key == pygame.K_SPACE:
player.jump()
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == ord('a'):
player.control(steps,0)
if event.key == pygame.K_RIGHT or event.key == ord('d'):
player.control(-steps,0)
if event.key == pygame.K_SPACE:
player.jump_cut()
dt = clock.tick(60) / 1000
all_sprites.update(dt)
player.update(dt)
all_sprites.draw(surface) #refresh player position
pygame.display.flip()
以下是 settings.py：
import pygame
width = 960
height = 720
fps = 40 # frame rate
pygame.display.set_caption('B.S.G.')
surface = pygame.display.set_mode((width, height))
PLAYER_ACC = 0.5
PLAYER_FRICTION = -0.12
PLAYER_GRAV = 0.8
PLAYER_JUMP = 20
PLAYER_LAYER = 2
PLATFORM_LAYER = 1
RED = (255, 0, 0)
steps = 10 # how fast to move
这是 Sprite1.py：
import pygame
import sys
import os
import time
from pygame import mixer
from pygame.locals import *
from settings import *
vec = pygame.math.Vector2
def showStartScreen(surface):
show = True
while (show == True):
background = pygame.image.load(os.path.join('images', 'Starting_scr.png'))
# rect = surface.get_rect()
surface.blit(background, (0,0))
pygame.display.flip()
for event in pygame.event.get():
if event.type == pygame.MOUSEBUTTONDOWN:
show = False
class Player(pygame.sprite.Sprite):
def __init__(self, all_sprites):
self._layer = PLAYER_LAYER
#self.groups = game.all_sprites
pygame.sprite.Sprite.__init__(self)
#self.game = game
self.movex = 0
self.movey = 0
self.frame = 0
self.health = 10
self.jumping = False
self.images = []
self.imagesleft = []
self.imagesright = []
self.direction = "right"
self.alpha = (0,0,0)
self.ani = 4 # animation cycles
self.all_sprites = all_sprites
self.add(self.all_sprites)
self.bullet_timer = .1
self.pos = vec(40, height - 100)
self.vel = vec(0, 0)
self.acc = vec(0, 0)
for i in range(1,5):
img = pygame.image.load(os.path.join('images','hero' + str(i) + '.png')).convert()
img.convert_alpha()
img.set_colorkey(self.alpha)
self.imagesright.append(img)
self.image = self.imagesright[0]
self.rect = self.image.get_rect()
for i in range(1,5):
img = pygame.image.load(os.path.join('images','hero' + str(i) + '.png')).convert()
img = pygame.transform.flip(img, True, False)
img.convert_alpha()
img.set_colorkey(self.alpha)
self.imagesleft.append(img)
self.image = self.imagesleft[0]
self.rect = self.image.get_rect()
def control(self,x,y):
'''
control player movement
'''
self.movex += x
self.movey -= y
def jump_cut(self):
if self.jumping:
if self.vel.y < -3:
#self.rect.y += 100
self.vel.y = -3
#self.jumping = False
print(self.vel.y)
def jump(self):
# jump only if standing on a platform
#self.rect.y += 20
#hits = pygame.sprite.spritecollide(self, self.game.platforms, False)
#self.rect.y -= 100
if self.rect.y == 500 and not self.jumping:
#self.game.jump_sound.play()
self.jumping = True
self.vel.y = -PLAYER_JUMP
print(self.rect.y)
def update(self, dt):
'''
Update sprite position
'''
self.rect.x = self.rect.x + self.movex
self.rect.y = self.rect.y + self.movey
self.acc = vec(0, PLAYER_GRAV)
# apply friction
self.acc.x += self.vel.x * PLAYER_FRICTION
keys = pygame.key.get_pressed()
if keys[pygame.K_LEFT]:
self.acc.x = -PLAYER_ACC
if keys[pygame.K_RIGHT]:
self.acc.x = PLAYER_ACC
# equations of motion
self.vel += self.acc
if abs(self.vel.x) < 0.1:
self.vel.x = 0
self.pos += self.vel + 0.5 * self.acc
# wrap around the sides of the screen
if self.pos.x > width + self.rect.width / 2:
self.pos.x = 0 - self.rect.width / 2
if self.pos.x < 0 - self.rect.width / 2:
self.pos.x = width + self.rect.width / 2
self.rect.midbottom = self.pos
# moving left
if self.movex < 0:
self.frame += 1
if self.frame > 3*self.ani:
self.frame = 0
self.image = self.imagesleft[self.frame//self.ani]
self.direction = "left"
# moving right
if self.movex > 0:
self.frame += 1
if self.frame > 3*self.ani:
self.frame = 0
self.image = self.imagesright[self.frame//self.ani]
self.direction = "right"
keys = pygame.key.get_pressed()
if keys[pygame.K_SPACE]:
self.bullet_timer -= dt # Subtract the time since the last tick.
if self.bullet_timer <= 0:
self.bullet_timer = 100 # Bullet ready.
if keys: # Left mouse button.
# Create a new bullet instance and add it to the groups.
if self.direction == "right":
Bullet([self.rect.x + self.image.get_width(), self.rect.y + self.image.get_height()/2], self.direction, self.all_sprites)
else:
Bullet([self.rect.x, self.rect.y + self.image.get_height()/2], self.direction, self.all_sprites)
self.bullet_timer = .1 # Reset the timer.
class Bullet(pygame.sprite.Sprite):
IMAGE = None
FLIPPED_IMAGE = None
def __init__(self, pos, direction, *sprite_groups):
super().__init__(*sprite_groups)
if not Bullet.IMAGE:
Bullet.IMAGE = pygame.image.load(os.path.join('images','fireball.png'))
Bullet.FLIPPED_IMAGE = pygame.transform.flip(Bullet.IMAGE, True, False)
if direction == "right":
self.vel = pygame.math.Vector2(750, 0)
self.image = Bullet.IMAGE
else:
self.vel = pygame.math.Vector2(-750, 0)
self.image = Bullet.FLIPPED_IMAGE
self.pos = pygame.math.Vector2(pos)
self.rect = self.image.get_rect(center=pos)
def update(self, dt):
# Add the velocity to the position vector to move the sprite
self.pos += self.vel * dt
self.rect.center = self.pos # Update the rect pos.
if not pygame.display.get_surface().get_rect().colliderect(self.rect):
self.kill()
我最终找到了一种方法，让它按照我希望的方式工作！ 我首先将这些变量写入我的 settings.py：
isJump = False
jumpCount = 10
我在 KEYDOWN 和 KEYUP 之后将这部分代码添加到我的 main.py 主循环中：
keys = pygame.key.get_pressed()
if not(isJump):
if keys[pygame.K_UP]:
isJump = True
else:
if jumpCount >= -10:
player.rect.y -= (jumpCount * abs(jumpCount)) * 1
jumpCount -= 2
else:
jumpCount = 10
isJump = False
我在这个网站上学到了所有这些：https://techwithtim.net/tutorials/game-development-with-python/pygame-tutorial/jumping/