问题描述
所以我一直在努力使我的大炮图像可以旋转到我的鼠标所在的位置,但是我正在尝试的代码有问题。我的大炮不跟随我的鼠标,当我放置旋转代码时,我丢失了另一个精灵,我尝试了一个将在下面显示的代码,但是我尝试的代码导致了我的问题。下面还有我的大炮和我的另一个精灵。
我的代码和我尝试过的
import pygame,math
pygame.init()
# Windowing screen width and height
width = 700
height = 500
window = pygame.display.set_mode((width,height))
# Name of window
pygame.display.set_caption("Game")
# A Part of cannon rotating
def blitRotate(surf,image,pos,originPos,angle):
# calcaulate the axis aligned bounding Box of the rotated image
w,h = image.get_size()
sin_a,cos_a = math.sin(math.radians(angle)),math.cos(math.radians(angle))
min_x,min_y = min([0,sin_a*h,cos_a*w,sin_a*h + cos_a*w]),max([0,sin_a*w,-cos_a*h,sin_a*w - cos_a*h])
# calculate the translation of the pivot
pivot = pygame.math.Vector2(originPos[0],-originPos[1])
pivot_rotate = pivot.rotate(angle)
pivot_move = pivot_rotate - pivot
# calculate the upper left origin of the rotated image
origin = (pos[0] - originPos[0] + min_x - pivot_move[0],pos[1] - originPos[1] - min_y + pivot_move[1])
# get a rotated image
rotated_image = pygame.transform.rotate(image,angle)
# rotate and blit the image
surf.blit(rotated_image,origin)
#####
# Player class
class Player:
def __init__(self,x,y,width,height,color):
self.x = x
self.y = y
self.width = width
self.height = height
self.color = color
self.speed = 4
self.cannon = pygame.image.load("img/cannon.png")
self.cannon2 = pygame.image.load("img/cannon2.png")
self.cannon = pygame.transform.scale(self.cannon,(self.cannon.get_width()//2,self.cannon.get_height()//2))
self.cannon2 = pygame.transform.scale(self.cannon2,(self.cannon2.get_width()//2,self.cannon2.get_height()//2))
self.rect = pygame.Rect(x,height)
#Another part of cannon roting
self.image = self.cannon
self.rect = self.image.get_rect(center = (self.x,self.y))
self.look_at_pos = (self.x,self.y)
self.isLookingAtPlayer = False
self.look_at_pos = (x,y)
def get_rect(self):
self.rect.topleft = (self.x,self.y)
return self.rect
def draw(self):
self.rect.topleft = (self.x,self.y)
pygame.draw.rect(window,self.color,self.rect)
player_rect = self.cannon.get_rect(center = self.get_rect().center)
player_rect.centerx -= 0.4
player_rect.centery += 0
window.blit(self.cannon,player_rect)
player_rect = self.cannon2.get_rect(center = self.get_rect().center)
player_rect.centerx -= 0.7
player_rect.centery += 30
window.blit(self.cannon2,player_rect)
# Another part of cannon rotating
dx = self.look_at_pos[0] - self.rect.centerx
dy = self.look_at_pos[1] - self.rect.centery
angle = (180/math.pi) * math.atan2(-dy,dx)
gun_size = self.image.get_size()
pivot = (8,gun_size[1]//2)
blitRotate(window,self.image,self.rect.center,pivot,angle)
def lookAt( self,coordinate ):
self.look_at_pos = coordinate
# The color white
white = (255,255,255)
# The xy cords,height and color of my classes[]
playerman = Player(350,416,34,75,white)
# This is where my balloons get hit by the bullet and disappers
# redrawing window
def redrawwindow():
window.fill((0,0))
# drawing the player in window
playerman.draw()
# Frames for game
fps = 30
clock = pygame.time.Clock()
#projectile empty list
bullets = []
# main loop
run = True
while run:
clock.tick(fps)
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
# cannon rotation
mousex,mousey = pygame.mouse.get_pos()
if not playerman.isLookingAtPlayer:
playerman.lookAt((mousex,mousey))
# telling game that key means when a key get pressed
keys = pygame.key.get_pressed()
# The player moving when the key a is pressed
if keys[pygame.K_a] and playerman.x > playerman.speed:
playerman.x -= playerman.speed
# The player moving when the key a is pressed
if keys[pygame.K_d] and playerman.x < 500 - playerman.width - playerman.height:
playerman.x += playerman.speed
# Calling the redraw function
redrawwindow()
# updating game
pygame.display.update()
# quiting the game
pygame.quit()
解决方法
按照对How to rotate an image(player) to the mouse direction? 的答案中的建议进行操作。您必须考虑大炮图像的方向:
angle = (180/math.pi) * math.atan2(-dy,dx) - 90
angle = (180/math.pi) * math.atan2(-dy,dx) - 90
见How do I rotate an image around its center using PyGame?和How can you rotate an image around an off center pivot in PyGame。pos
的第二个参数 (blitRotate
) 是窗口中枢轴点的位置,第三个参数 (originPos
) 是旋转 上枢轴点的位置表面:
blitRotate(window,self.image,self.rect.center,pivot,angle)
gun_size = self.image.get_size()
pivot_abs = player_rect.centerx,player_rect.top + 10
pivot_rel = (gun_size[0] // 2,105)
blitRotate(window,pivot_abs,pivot_rel,angle)
完整的Player.draw
方法:
class Player:
# [...]
def draw(self):
self.rect.topleft = (self.x,self.y)
player_rect = self.cannon2.get_rect(center = self.get_rect().center)
player_rect.centerx -= 0
player_rect.centery -= 10
# Another part of cannon rotating
dx = self.look_at_pos[0] - self.rect.centerx
dy = self.look_at_pos[1] - self.rect.centery
angle = (180/math.pi) * math.atan2(-dy,dx) - 90
gun_size = self.image.get_size()
pivot_abs = player_rect.centerx,player_rect.top + 10
pivot_rel = (gun_size[0] // 2,105)
pygame.draw.rect(window,self.color,self.rect)
blitRotate(window,angle)
window.blit(self.cannon2,player_rect)