Another chapter of this videogame tutorial with pygame.
RepositoryGithub repository with the codel (001.py)
Repository
1 Move Sprite
2 collisions
3 Ai enemy 1
4 frame rate
6 Enemy AI 2
7 Images, movements
8 Bullet 1
9 AI 3, images
Now, what I do want to do is to make the enemy to stay on the border and move from a side to another firing against the player.
The code
import pygame
import random
'''
https://pythonprogramming.altervista.org
Github repository with the codel (001.py)
https://github.com/formazione/pygame_days
1 https://youtu.be/wAKLVFMb7eE Move Sprite
2 https://youtu.be/rsBJgWqsoa4 collisions
3 https://youtu.be/J3k4-tqy_kM Ai enemy 1
4 https://youtu.be/vwYu9Eel9QM frame rate
6 https://youtu.be/UaPjKtuQyfA Enemy AI 2
7 https://youtu.be/ZuEc6gncGNs Images, movements
8 https://youtu.be/wobJoDgI0LQ Bullet 1
'''
def show_fps():
''' shows the frame rate on the screen '''
fps_text = str(int(clock.get_fps())) # get the clocl'fps
# render a text surface
fps_text += f" enemy y:{enemy.y} - player y:{player.y}"
fps_surface = fps_font.render(fps_text, 1, pygame.Color("white"))
# blit the text surface on the backgroud
screen.blit(fps_surface, (0, 0))
class Screen:
def check_collision():
if player.rect.colliderect(enemy):
enemy.respawn()
def mainloop(loop):
# when press left, right...
if player.left == 1: # left
player.x -= speed
if player.right == 1: # right
player.x += speed
if player.up == 1: # up
player.y -= speed
if player.down == 1: # down
player.y += speed
# get user event (press key...)
for event in pygame.event.get():
if event.type == pygame.QUIT:
loop = 0
if event.type == pygame.KEYDOWN:
# left = 0, right = 2, up = 1, down =3
if event.key == pygame.K_LEFT:
player.left = 1
player.image = player.imagel
if event.key == pygame.K_RIGHT:
player.right = 1
player.image = player.imager
if event.key == pygame.K_UP:
player.up = 1
player.image = player.imageu
if event.key == pygame.K_DOWN:
player.down = 1
player.image = player.imaged
# when you release the key player stops
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT:
player.left = 0
if event.key == pygame.K_RIGHT:
player.right = 0
if event.key == pygame.K_UP:
player.up = 0
if event.key == pygame.K_DOWN:
player.down = 0
Screen.check_collision()
screen.fill(0)
show_fps()
player.draw()
enemy.draw()
bullet.draw()
enemy.move_ai()
pygame.display.update()
clock.tick(60)
return loop
class Color:
yellow = (0, 255, 0)
red = (255, 0, 0)
blue = (0, 0, 255)
class Sprite:
def draw(self):
self.rect[0] = self.x
self.rect[1] = self.y
screen.blit(self.image, (self.x,self.y))
class Player(Sprite):
def __init__(self, x, y):
self.left = 0
self.right = 0
self.up = 0
self.down = 0
self.x = x
self.y = y
self.image = pygame.image.load("img/player.png").convert()
self.imageu = pygame.image.load("img/player1.png").convert()
self.imager = pygame.image.load("img/player2.png").convert()
self.imaged = pygame.image.load("img/player3.png").convert()
self.imagel = pygame.image.load("img/player4.png").convert()
self.rect = self.image.get_rect()
class Bullet():
def __init__(self):
self.x = enemy.x
self.y = enemy.y
self.image = pygame.image.load("img/bullet.png").convert()
self.rect = self.image.get_rect()
def draw(self):
if enemy.x < player.x:
self.rect[0] = enemy.x + 50
if enemy.x > player.x:
self.rect[0] = enemy.x
if abs(enemy.x - player.x) < 8:
self.rect[0] = enemy.x + 24
if enemy.y > player.y:
self.rect[1] = enemy.y
if enemy.y < player.y:
self.rect[1] = enemy.y + 50
if abs(enemy.y - player.y) < 8:
self.rect[1] = enemy.y + 24
screen.blit(self.image, self.rect)
class Enemy(Sprite):
def __init__(self, x, y):
# Position is the same as enemy's position
self.x = x
self.y = y
self.image = pygame.image.load("img/enemy.png").convert()
self.rect = self.image.get_rect()
self.rect[0] = x
self.rect[1] = y
self.border = 0
def move_ai(self):
if self.border == 0:
# ESCAPE HORIZZONTALLY
if self.x < 550 and self.x > 0:
# it will escape from right if the player is more to left
if player.x < self.x:
self.x += 3
elif player.x > self.x:
self.x -= 3
else:
if random.random() > 0.5:
self.x += 3
else:
self.x -=3
# ESCAPE VERTICALLY
if self.y < 350 and self.y > 0:
if player.y < self.y:
self.y += 3
elif player.y > self.y:
self.y -= 3
if random.random() > 0.5:
self.y += 3
else:
self.y -= 3
if (-4 <= self.y <= 4) or \
(-4 <= self.x <= 4) or \
(545 <= self.x <= 555) or \
(345 <= self.y <= 355):
self.border = 1
self.respawn()
def respawn(self):
self.x = random.randrange(0, 580)
self.y = random.randrange(0, 380)
self.border = 0
pygame.init()
screen = pygame.display.set_mode((600, 400))
clock = pygame.time.Clock()
# white surface on which we show the frame rate
fps_font = pygame.font.SysFont("Arial", 20) # a font for the fps
speed = 3
# =========== MAIN LOOP ==========
player = Player(0,0)
enemy = Enemy(100,100)
bullet = Bullet()
loop = 1
while loop:
loop = Screen.mainloop(loop) # all the actions
pygame.quit()
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