Vfrdtyky

I am struggling with finding a way to make the sprite jump in pygame. when i basically run the program now the sprite goes straight to the top of the screen and i just want it to do a normal jump. the jump is in a class and is a function. I have used KEYDOWN to check when its pressed to move it downwards.

import pygame

import random

import sys





pygame.init()

screen = pygame.display.set_mode((1280, 720))

clock = pygame.time.Clock()  # A clock to limit the frame rate.

pygame.display.set_caption("this game")





class Background:

    picture = pygame.image.load("C:/images/dunes.jpg").convert()

    picture = pygame.transform.scale(picture, (1280, 720))



    def __init__(self, x, y):

        self.xpos = x

        self.ypos = y



    def draw(self):

        # Blit the picture onto the screen surface.

        # `self.picture` not just `picture`.

        screen.blit(self.picture, (self.xpos, self.ypos))





class Monster:

    picture = pygame.image.load("C:/pics/hammerhood.png").convert_alpha()

    picture = pygame.transform.scale(picture, (200, 200))



    def __init__(self, x, y):

        self.xpos = x

        self.ypos = y

    # If you want to move continuously you need to set these

    # attributes to the desired speed and then add them to

    # self.xpos and self.ypos in an update method that should

    # be called once each frame.

        self.speed_x = 0

        self.speed_y = 0



    def update(self):

        # Call this method each frame to update the positions.

        self.xpos += self.speed_x

        self.ypos += self.speed_y



    # Not necessary anymore.

    def move_left(self):

        self.xpos -= 5  # -= not = -5 (augmented assignment).



    def move_right(self):

        self.xpos += 5  # += not = +5 (augmented assignment).



    def jump(self): #vvvvvvv this is the part i do not know how to fix 





    # What do you want to do here?

    #for x in range(1, 10):

        #self.ypos -= 1  # -= not =-

        # pygame.display.show()  # There's no show method.



    #for x in range(1, 10):

        #self.ypos += 1

        # pygame.display.show()



    def draw(self):

        screen.blit(self.picture, (self.xpos, self.ypos))





class Enemy:  # Use upper camelcase names for classes.

    picture = pygame.image.load("C:/pics/dangler_fish.png").convert_alpha()

    picture = pygame.transform.scale(picture, (200, 200))



    def __init__(self, x, y):

        self.xpos = x

        self.ypos = y



    def teleport(self):

        self.xpos = random.randint(1, 1280)

        self.ypos= random.randint(1, 720)



    def draw(self):

        screen.blit(self.picture, (self.xpos, self.ypos))





# Create the instances before the while loop.

ice = Background(0, 0)  # I pass 0, 0 so that it fills the whole screen.

hammerhood = Monster(200, 500)

fish = Enemy(0, 0)



while True:

    # Handle events.

    for event in pygame.event.get():

        if event.type == pygame.QUIT:

            pygame.quit()

            sys.exit()

        # Check if the `event.type` is KEYDOWN first.

        elif event.type == pygame.KEYDOWN:

            # Then check which `event.key` was pressed.

            if event.key == pygame.K_d:

                #hammerhood.move_right()

                hammerhood.speed_x = 5

            elif event.key == pygame.K_a:

                #hammerhood.move_left()

                hammerhood.speed_x = -5

            elif event.key == pygame.K_w:

                hammerhood.jump()

        elif event.type == pygame.KEYUP:

            # Stop moving when the keys are released.

            if event.key == pygame.K_d and hammerhood.speed_x > 0:

                hammerhood.speed_x = 0

            elif event.key == pygame.K_a and hammerhood.speed_x < 0:

                hammerhood.speed_x = 0



    # Update the game.

    hammerhood.update()

    fish.teleport()



    if hammerhood.xpos == 1280 or hammerhood.xpos == 0:

        hammerhood.speed_x = 0



    # Draw everything.

    ice.draw()  # Blit the background to clear the screen.

    hammerhood.draw()

    fish.draw()

    pygame.display.flip()

    clock.tick(60)  # Limit the frame rate to 60 FPS.

Just add a GRAVITY constant and add it to the self.speed_y each frame to accelerate the player.

GRAVITY = .9  # Define this in the global scope.





# The Monster's update method.

def update(self):

    self.speed_y += GRAVITY  # Accelerate downwards.

    self.xpos += self.speed_x

    self.ypos += self.speed_y



    # Stop falling at the bottom of the screen.

    if self.ypos >= 520:

        self.ypos = 520

        self.speed_y = 0

        self.on_ground = True

Set the self.speed_y to a negative value when you start to jump:

def jump(self):

    if self.on_ground:  # This prevents air jumps.

        self.on_ground = False

        self.speed_y = -25