Python–在 PyGame 中使用箭头键进行绘图设计
原文:https://www . geesforgeks . org/python-drawing-design-use-箭头键-in-pygame/
Pygame 是一套跨平台的 Python 模块，设计用于编写视频游戏。它包括设计用于 Python 编程语言的计算机图形和声音库。现在，这取决于开发者的想象力或必要性，他/她想使用这个工具包开发什么类型的游戏。
在本文中，我们将看到如何在 PyGame 中借助按键进行设计，即当按下键盘上的右箭头键或左箭头键时，标记水平移动，而当按下上箭头键或下箭头键时，标记垂直移动。我们可以通过在各自的坐标上做一个点(标记)来做到这一点，这可以在按键的帮助下得到改变。
Change in Co-ordinates of marker for respective keys pressed :
Left arrow key: Decrement in x co-ordinate
Right arrow key: Increment in x co-ordinate
Up arrow key: Decrement in y co-ordinate
Down arrow key: Increment in y co-ordinate
以下是实施–
# import pygame module in this program
import pygame
# activate the pygame library .
# initiate pygame and give permission
# to use pygame's functionality.
pygame.init()
# create the display surface object
# of specific dimension..e(500, 500).
win = pygame.display.set_mode((500, 500))
# set the pygame window name
pygame.display.set_caption("Moving rectangle")
# marker current co-ordinates
x = 200
y = 200
# dimensions of the marker
width = 10
height = 10
# velocity / speed of movement
vel = 10
# Indicates pygame is running
run = True
# infinite loop
while run:
# creates time delay of 10ms
pygame.time.delay(10)
# iterate over the list of Event objects
# that was returned by pygame.event.get() method.
for event in pygame.event.get():
# if event object type is QUIT
# then quitting the pygame
# and program both.
if event.type == pygame.QUIT:
# it will make exit the while loop
run = False
# stores keys pressed
keys = pygame.key.get_pressed()
# if left arrow key is pressed
if keys[pygame.K_LEFT] and x > 0:
# decrement in x co-ordinate
x -= vel
# if left arrow key is pressed
if keys[pygame.K_RIGHT] and x < 500 - width:
# increment in x co-ordinate
x += vel
# if left arrow key is pressed
if keys[pygame.K_UP] and y > 0:
# decrement in y co-ordinate
y -= vel
# if left arrow key is pressed
if keys[pygame.K_DOWN] and y < 500 - height:
# increment in y co-ordinate
y += vel
# drawing spot on screen which is rectangle here
pygame.draw.rect(win, (255, 0, 0), (x, y, width, height))
# it refreshes the window
pygame.display.update()
# closes the pygame window
pygame.quit()
输出:
[https://media.geeksforgeeks.org/wp-content/uploads/20200329025606/Design-maker-29-03-2020-02_55_22.mp4](https://media.geeksforgeeks.org/wp-content/uploads/20200329025606/Design-maker-29-03-2020-02_55_22.mp4)版权属于：月萌API www.moonapi.com，转载请注明出处
