Brtdku

I am trying to animate two characters in my game. I want the animation to play without any key being held down. Every tutorial I have seen requires the player to press a key for an animation to play. How would you get the dolphin to be animated, but still work with the existing code I have? Currently I have the dolphin set to frame[0] so it is visible when you run it. Any help is appreciated!

Images and Sound FX download: https://mega.nz/#F!7O5zRQDK!YQhrs_zavCvdSdAMwEXEIQ

Game I am basing off of: https://www.youtube.com/watch?v=9jjy9PjbeiA&t=3s

import pygame

import random

import time

import os

os.environ['SDL_VIDEO_WINDOW_POS'] = "%d, %d" %(0, 20)

pygame.init()



SIZE = W, H = 400, 700

screen = pygame.display.set_mode(SIZE)

clock = pygame.time.Clock()



# colours

RED = (255, 0, 0)

GREEN = (0, 255, 0)

BLUE = (0, 0, 255)

BACKGROUND = (94, 194, 222)

STRIPE = (60, 160, 190)

LANELINE = (255, 255, 255)



x1 = 30

x2 = 330

lane1 = 30

lane2 = 130

lane3 = 230

lane4 = 330

y = 530

width = 40

height = 64



toggle1 = 0

toggle2 = 0



target_x1 = 30

target_x2 = 330

vel_x = 10



def drawScene():

    screen.fill(BACKGROUND)

    pygame.draw.polygon(screen, STRIPE, ((200, 700), (300, 700), (400, 600), (400, 500)))

    pygame.draw.polygon(screen, STRIPE, ((0, 700), (100, 700), (400, 400), (400, 300)))

    pygame.draw.polygon(screen, STRIPE, ((0, 500), (0, 600), (400, 200), (400, 100)))

    pygame.draw.polygon(screen, STRIPE, ((0, 300), (0, 400), (400, 0), (300, 0)))

    pygame.draw.polygon(screen, STRIPE, ((0, 100), (0, 200), (200, 0), (100, 0)))

    pygame.draw.line(screen, LANELINE, (100, 0), (100, 700), 2)

    pygame.draw.line(screen, LANELINE, (200, 0), (200, 700), 4)

    pygame.draw.line(screen, LANELINE, (300, 0), (300, 700), 2)





dolphinSheet = pygame.image.load("dolphinSheet.png").convert()

cells = 

for n in range(6):

    dolphinW, dolphinH, = (31, 74)

    rect = pygame.Rect(n * dolphinW, 0, dolphinW, dolphinH)

    image = pygame.Surface(rect.size).convert()

    image.blit(dolphinSheet, (0, 0), rect)

    alpha = image.get_at((0, 0))

    image.set_colorkey(alpha)

    cells.append(image)





playerImg = cells[0]





# main loop

run = True

while run:

    clock.tick(60)



    for event in pygame.event.get():

        if event.type == pygame.QUIT:

            run = False



        if event.type == pygame.KEYDOWN:

            if event.key == pygame.K_a:

                pygame.mixer.music.load('percussiveHit.mp3')

                pygame.mixer.music.play()

                toggle1 += 1

                if toggle1 % 2 == 1:

                    target_x1 += 100

                else:

                    target_x1 -= 100

            elif event.key == pygame.K_d:

                pygame.mixer.music.load('percussiveHit.mp3')

                pygame.mixer.music.play()

                toggle2 += 1

                if toggle2 % 2 == 1:

                    target_x2 -= 100

                else:

                    target_x2 += 100



    if x1 < target_x1:

        x1 = min(x1 + vel_x, target_x1)

    else:

        x1 = max(x1 - vel_x, target_x1)



    if x2 < target_x2:

        x2 = min(x2 + vel_x, target_x2)

    else:

        x2 = max(x2 - vel_x, target_x2)



    pygame.draw.rect(screen, RED, (x1, y, width, height))

    pygame.draw.rect(screen, RED, (x2, y, width, height))

    drawScene()

    # players

    screen.blit(playerImg, (x1 + 4, y - 5))

    screen.blit(playerImg, (x2 + 4, y - 5))

    pygame.display.update()



pygame.quit()

Update the image based on a real-time millisecond value using pygame.time.get_ticks() which returns the number of milliseconds since pygame.init().

The idea is the code remembers the time the frame was changed, and then waits until X seconds have elapsed (playerImg_show_for below), before switching to the next image in the set.

...



playerImg = cells[0]

playerImg_cell     = -1   # start at first cell

playerImg_shown_at = 0    # time when this frame (cell) was shown

playerImg_show_for = 200  # milliseconds





# main loop

run = True

while run:

    clock.tick(60)

    ms_now = pygame.time.get_ticks()  # milliseconds since start



    for event in pygame.event.get():

        if event.type == pygame.QUIT:

            run = False



    # ... handle keys, etc. removed for the sake of brevity



    pygame.draw.rect(screen, RED, (x1, y, width, height))

    pygame.draw.rect(screen, RED, (x2, y, width, height))

    drawScene()



    # players

    # If this frame of animation has been shown for long enough, then

    # switch to the next frame

    if ( ms_now - playerImg_shown_at > playerImg_show_for ):

        playerImg_cell += 1   # find the next cell, with wrap-around

        if ( playerImg_cell >= len( cells ) ):

            playerImg_cell = 0

        playerImg_shown_at = ms_now        # use new start time

        playerImg = cells[playerImg_cell]  # use new animation cell



    screen.blit(playerImg, (x1 + 4, y - 5))

    screen.blit(playerImg, (x2 + 4, y - 5))

    pygame.display.update()



pygame.quit()

Of course this would be better suited to being a PyGame sprite object, and all handled in the sprite's update() function.