Pygame 指向鼠标的点图像 [英] Pygame point image towards mouse

问题描述

我试图让这个图像宇宙飞船"指向我在屏幕上的鼠标，事实证明这很困难，所以我希望得到任何帮助:O 另外，如果你能帮助将图像移向光标，我将不胜感激，我猜这与向它旋转非常相似..这是我的代码:

I am trying to get this image 'spaceship' to point towards my mouse on screen, proving to be quite difficult so I would appreciate any help :O Also, would appreciate it if you could help with moving an image towards the cursor, i'm guessing that would be quite similar to rotating towards it.. Heres my code:

import sys, pygame, math;
from pygame.locals import *;
spaceship = ('spaceship.png')
mouse_c = ('crosshair.png')
backg = ('background.jpg')
pygame.init()
screen = pygame.display.set_mode((800, 600))
bk = pygame.image.load(backg).convert_alpha()
mousec = pygame.image.load(mouse_c).convert_alpha()
space_ship = pygame.image.load(spaceship).convert_alpha()
clock = pygame.time.Clock()
pygame.mouse.set_visible(False)
while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == MOUSEBUTTONDOWN and event.button == 1:
            print("test1")
        elif event.type == MOUSEBUTTONDOWN and event.button == 3:
            print("test3")
    screen.blit(bk, (0, 0))
    pos = pygame.mouse.get_pos()
    screen.blit(mousec, (pos))
    screen.blit(space_ship, (400, 300)) #I need space_ship to rotate towards my cursor
    pygame.display.update()

推荐答案

这里:

import sys, pygame, math;
from pygame.locals import *;
spaceship = ('spaceship.png')
mouse_c = ('crosshair.png')
backg = ('background.jpg')
pygame.init()
screen = pygame.display.set_mode((800, 600))
bk = pygame.image.load(backg).convert_alpha()
mousec = pygame.image.load(mouse_c).convert_alpha()
space_ship = pygame.image.load(spaceship).convert_alpha()
clock = pygame.time.Clock()
pygame.mouse.set_visible(False)
while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == MOUSEBUTTONDOWN and event.button == 1:
            print("test1")
        elif event.type == MOUSEBUTTONDOWN and event.button == 3:
            print("test3")
    screen.blit(bk, (0, 0))
    pos = pygame.mouse.get_pos()
    screen.blit(mousec, (pos))
    angle = 360-math.atan2(pos[1]-300,pos[0]-400)*180/math.pi
    rotimage = pygame.transform.rotate(space_ship,angle)
    rect = rotimage.get_rect(center=(400,300))
    screen.blit(rotimage,rect) #I need space_ship to rotate towards my cursor
    pygame.display.update()

首先获取飞船和鼠标之间的角度，然后旋转图像并设置图像的中心，使图像在旋转时不会四处移动.

First get the angle between the space ship and the mouse, then rotate the image and set the center of the image so the image doesn't move around while rotating.

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