用Python和Pygame写游戏-从入门到精通（11）鼠标控制输入

鼠标控制输入

background_image_filename = 'sushiplate.jpg'sprite_image_filename = 'fugu.png' import pygamefrom pygame.locals import *from sys import exitimport vector2from math import * pygame.init()close = Falsescreen = pygame.display.set_mode((640, 480), 0, 32) background = pygame.image.load(background_image_filename).convert()sprite = pygame.image.load(sprite_image_filename).convert_alpha() clock = pygame.time.Clock() # 让pygame完全控制鼠标pygame.mouse.set_visible(False)pygame.event.set_grab(True) sprite_pos = vector2.Vec2d(200, 150)sprite_speed = 300.sprite_rotation = 0.sprite_rotation_speed = 360. while True:     for event in pygame.event.get():        if event.type == QUIT:            pygame.quit()            exit            close = True        # 按Esc则退出游戏        if event.type == KEYDOWN:            if event.key == K_ESCAPE:                pygame.quit()                exit                close = True    if close == True:        break        pressed_keys = pygame.key.get_pressed()    # 这里获取鼠标的按键情况    pressed_mouse = pygame.mouse.get_pressed()     rotation_direction = 0.    movement_direction = 0.     # 通过移动偏移量计算转动    rotation_direction = pygame.mouse.get_rel()[0]/5.0     if pressed_keys[K_LEFT]:        rotation_direction = +1.    if pressed_keys[K_RIGHT]:        rotation_direction = -1.    # 多了一个鼠标左键按下的判断    if pressed_keys[K_UP] or pressed_mouse[0]:        movement_direction = +1.    # 多了一个鼠标右键按下的判断    if pressed_keys[K_DOWN] or pressed_mouse[2]:        movement_direction = -1.     screen.blit(background, (0,0))     rotated_sprite = pygame.transform.rotate(sprite, sprite_rotation)    w, h = rotated_sprite.get_size()    sprite_draw_pos = vector2.Vec2d(sprite_pos.x-w/2, sprite_pos.y-h/2)    screen.blit(rotated_sprite, sprite_draw_pos)     time_passed = clock.tick()    time_passed_seconds = time_passed / 1000.0     sprite_rotation += rotation_direction * sprite_rotation_speed * time_passed_seconds     heading_x = sin(sprite_rotation*pi/180.)    heading_y = cos(sprite_rotation*pi/180.)    heading = vector2.Vec2d(heading_x, heading_y)    heading *= movement_direction     sprite_pos+= heading * sprite_speed * time_passed_seconds     pygame.display.update()