The Runner

Part of the Game Rules section of Coddy's Pygame journey. Lesson 23 of 29.

This chapter builds Sky Runner, an endless runner. The runner stays near the left edge while obstacles come from the right; you jump over them for as long as you can. The sky and the ground are drawn. The runner is a sprite, as in section 3:

class Runner(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.image.load("assets/images/player.png").convert_alpha()
        self.rect = self.image.get_rect(midbottom=(100, GROUND_Y))

midbottom places the middle of the picture's bottom edge on a point. The runner's feet are at the bottom of its picture, so midbottom=(100, GROUND_Y) stands it on the ground at x 100, whatever its height.

GROUND_Y is the y of the ground's top edge, 260. Everything that stands on the ground uses it, so moving the ground later is one change.

Challenge

Easy

Write a Runner sprite class whose image is assets/images/player.png and whose rect has its midbottom at (100, GROUND_Y).
Make one, named runner, before the loop.
Blit runner.image at runner.rect after drawing the ground.

Try it yourself

import pygame

pygame.init()
screen = pygame.display.set_mode((640, 320))
pygame.display.set_caption("Sky Runner")
clock = pygame.time.Clock()

SKY = (140, 200, 240)
GROUND = (90, 160, 80)
GROUND_Y = 260

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    screen.fill(SKY)
    pygame.draw.rect(screen, GROUND, (0, GROUND_Y, 640, 60))
    pygame.display.flip()
    clock.tick(60)

pygame.quit()