To add particles in a game is very important to make the game more attractive. So, here is some code to do it. This code has been optimezed for great performances. I will make it even faster in a next post.
#!/usr/bin/python3.4
import pygame, sys, random
from pygame.locals import *
pygame.init()
clock = pygame.time.Clock()
pygame.display.set_caption('Fireworks')
screen = pygame.display.set_mode((1376, 900),0,32)
# [loc, velocity, timer]
particles = []
pygame.mouse.set_visible(False)
# ======================================= FPS ====
font = pygame.font.SysFont("Arial", 20)
def show_fps():
"shows the frame rate on the screen"
# global clock
fr = str(int(clock.get_fps()))
frt = font.render(fr, 1, pygame.Color("coral"))
screen.blit(frt, (0, 0))
def particles_gen(pnum):
for i in range(pnum):
mx, my = pygame.mouse.get_pos()
particles.append([[mx, my], [random.randint(0, 42) / 6 - 3.5, random.randint(0, 42) / 6 - 3.5], random.randint(4, 6)])
return particles
def randrange():
a, b, c = (random.randrange(0,255), random.randrange(0,255), random.randrange(0,255))
return a, b, c
def move_particles(particles):
for particle in particles:
particle[0][0] += particle[1][0]
particle[0][1] += particle[1][1]
particle[2] -= 0.035
particle[1][1] += 0.15
# this conditions to remove unseen particles optimize the velocity
conditions = particle[0][0] < 0 or particle[0][0] > 1376 or particle[0][1] > 900 or particle[0][1] < 0
particles.remove(particle) if (particle[2] == 1 or conditions) else pygame.draw.circle(screen, randrange(), [int(particle[0][0]), int(particle[0][1])], int(particle[2]))
while True:
screen.fill((0,0,0))
particles = particles_gen(pnum=5)
move_particles(particles)
show_fps()
# ========= FPS ============
# Buttons ------------------- #
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
if event.type == KEYDOWN:
if event.key == K_ESCAPE:
pygame.quit()
sys.exit()
pygame.display.flip()
clock.tick(60)
Twitter: @pythonprogrammi - python_pygame
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