pygame实现方块动画实例讲解
导入组件
首先导入需要的组件,pygame游戏组件,time是时间组件
import pygame, time, sys from pygame.locals import *
绘制窗口
这里定义了一个480*600的屏幕,设置了窗口标题,并设置了屏幕的填充颜色为白色
# 屏幕的宽高 WIDTH = 480 HEIGHT = 600 # 颜色的常量 WHITE = (255, 255, 255) surface = pygame.display.set_mode((WIDTH, HEIGHT), 0, 30) pygame.display.set_caption("矩形动画") while True: for event in pygame.event.get(): if event.type == QUIT: pygame.quit() sys.exit() surface.fill(WHITE) pygame.display.update()
绘制矩形
RED = (255, 0, 0) # 定义矩形字典变量 rect = {'rect': pygame.Rect(200, 200, 60, 46), 'color'http://www.cppcns.com: RED} --- surface.fill(WHITE) pygame.draw.rect(surface, rect['color'], rect['rect']) ---
让矩形动起来
从运动来看只有中心向四方移动的四种可能。定义四个方向的常量。
# 方向常量 UPLEFT = 'upleft' UPRIGHT = 'upright' DOWNLEFT = 'downleft' DOWNRIGHT = 'downright'
然后定义矩形的移动速度
# 矩形移动的速度 MOVESPEED = 2
给矩形设置一个初始的移动方向
# 定义矩形字典变量 rect = {'rect': pygame.Rect(200, 200, 60, 46), 'color': RED, 'direction': UPLEFT}
根据矩形的移动方向改变对应的起始位置。根据矩形不同的位置改变矩形的起始位置。
# 如果是上左,则x y 都减少 if rect['direction'] == UPLEFT: rect['rect'].left -= MOVESPEED rect['rect'].top -= MOVESPEED # 如果是上右,则x 增加 y 减少 if rect['direction'] == UPRIGHT: rect['rect'].left += MOVESPEED rect['rect'].top -= MOVESPEED # 如果是下左,则x 减少 y 增加 if rect['direction'] == DOWNLEFT: rect['rect'].left -= MOVESPEED rect['rect'].top += MOVESPEED # 如果是下右,则x y 都增加 if rect['direction'] == DOWNRIGHT: rect['rect'].left += MOVESPEED rect['rect'].top += MOVESPEED
不断的改变矩形的位置,要注意防止移出窗口,当触及到边缘,沿来的方向将矩形改变方向即可。
# 如果上溢出窗口 if rect['rect'].top <= 0: if rect['direction'] == UPLEFT: rect['direction'] = DOWNLEFT if rect['direction编程客栈'] == UPRIGHT: rect['direction'] = DOWNRIGHT # 如果下溢出窗口 if rect['rect'].bottom >= HEIGHT: if rect['direction'] == DOWNRIGHT: rect['direction'] = UPRIGHT if rect['direction'] == DOWNLEFT: rect['direction'] = UPLEFT # 如果右溢出窗口 if rect['rect'].right >= WIDTH: if rect['direction'] == DOWNRIGHT: rect['编程客栈direction'] = DOWNLEFT if rect['direction'] == UPRIGHT: rect['direction'] = UPLEFT # 如果右溢出窗口 if rect['rect'].left <= 0: if rect['direction'] == DOWNLEFT: rect['direction'] = DOWNRIGHT if r编程客栈ect['direction'] == UPLEFT: rect['direction'] = UPRIGHT
这样就实现了功能。每次循环让时间暂停一会即可。
这里附上所有代码
import pygame, time, sys from pygame.locals import * # 屏幕的宽高 WIDTH = 480 HEIGHT = 600 # 颜色的常量 WHITE = (255, 255, 255) RED = (255, 0, 0) # 方向常量 UPLEFT = 'upleft' UPRIGHT = 'upright' DOWNLEFT = 'downleft' DOWNRIGHT = 'downright' # 矩形移动的速度 MOVESPEED = 2 # 定义矩形字典变量 rect = {'rect': pygame.Rect(200, 200, 60, 46), 'color': RED, 'direction': UPLEFT} surface = pygame.display.set_mode((WIDTH, HEIGHT), 0, 30) pygame.display.set_caption("矩形动画") while True: print(rect) for event in pygame.event.get(): if event.type == QUIT: pygame.quit() sys.exit() surface.fill(WHITE) # 如果是上左,则x y 都减少 if rect['direction'] == UPLEFT: 编程客栈 rect['rect'].left -= MOVESPEED rect['rect'].top -= MOVESPEED # 如果是上右,则x 增加 y 减少 if rect['direction'] == UPRIGHT: rect['rect'].left += MOVESPEED rect['rect'].top -= MOVESPEED # 如果是下左,则x 减少 y 增加 if rect['direction'] == DOWNLEFT: rect['rect'].left -= MOVESPEED rect['rect'].top += MOVESPEED # 如果是下右,则x y 都增加 if rect['direction'] == DOWNRIGHT: rect['rect'].left += MOVESPEED rect['rect'].top += MOVESPEED # 如果上溢出窗口 if rect['rect'].top <= 0: if rect['direction'] == UPLEFT: rect['direction'] = DOWNLEFT if rect['direction'] == UPRIGHT: rect['direction'] = DOWNRIGHT # 如果下溢出窗口 if rect['rect'].bottom >= HEIGHT: if rect['direction'] == DOWNRIGHT: rect['direction'] = UPRIGHT if rect['direction'] == DOWNLEFT: rect['direction'] = UPLEFT # 如果右溢出窗口 if rect['rect'].right >= WIDTH: if rect['direction'] == DOWNRIGHT: rect['direction'] = DOWNLEFT if rect['direction'] == UPRIGHT: rect['direction'] = UPLEFT # 如果右溢出窗口 if rect['rect'].left <= 0: if rect['direction'] == DOWNLEFT: rect['direction'] = DOWNRIGHT if rect['direction'] == UPLEFT: rect['direction'] = UPRIGHT pygame.draw.rect(surface, rect['color'], rect['rect']) pygame.display.update() time.sleep(0.02)
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