120 lines
3.3 KiB
Python
120 lines
3.3 KiB
Python
#!/usr/bin/env python
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""" pygame.examples.moveit
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This is the full and final example from the Pygame Tutorial,
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"How Do I Make It Move". It creates 10 objects and animates
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them on the screen.
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It also has a separate player character that can be controlled with arrow keys.
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Note it's a bit scant on error checking, but it's easy to read. :]
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Fortunately, this is python, and we needn't wrestle with a pile of
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error codes.
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"""
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import os
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import pygame as pg
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main_dir = os.path.split(os.path.abspath(__file__))[0]
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# Height and Width of screen
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WIDTH = 640
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HEIGHT = 480
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# Height and width of the sprite
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SPRITE_WIDTH = 80
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SPRITE_HEIGHT = 60
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# our game object class
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class GameObject:
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def __init__(self, image, height, speed):
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self.speed = speed
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self.image = image
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self.pos = image.get_rect().move(0, height)
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# move the object.
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def move(self, up=False, down=False, left=False, right=False):
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if right:
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self.pos.right += self.speed
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if left:
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self.pos.right -= self.speed
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if down:
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self.pos.top += self.speed
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if up:
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self.pos.top -= self.speed
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# controls the object such that it cannot leave the screen's viewpoint
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if self.pos.right > WIDTH:
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self.pos.left = 0
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if self.pos.top > HEIGHT - SPRITE_HEIGHT:
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self.pos.top = 0
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if self.pos.right < SPRITE_WIDTH:
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self.pos.right = WIDTH
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if self.pos.top < 0:
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self.pos.top = HEIGHT - SPRITE_HEIGHT
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# quick function to load an image
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def load_image(name):
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path = os.path.join(main_dir, "data", name)
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return pg.image.load(path).convert()
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# here's the full code
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def main():
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pg.init()
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clock = pg.time.Clock()
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screen = pg.display.set_mode((WIDTH, HEIGHT))
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player = load_image("player1.gif")
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entity = load_image("alien1.gif")
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background = load_image("liquid.bmp")
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# scale the background image so that it fills the window and
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# successfully overwrites the old sprite position.
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background = pg.transform.scale2x(background)
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background = pg.transform.scale2x(background)
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screen.blit(background, (0, 0))
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objects = []
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p = GameObject(player, 10, 3)
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for x in range(10):
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o = GameObject(entity, x * 40, x)
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objects.append(o)
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pg.display.set_caption("Move It!")
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# This is a simple event handler that enables player input.
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while True:
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# Get all keys currently pressed, and move when an arrow key is held.
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keys = pg.key.get_pressed()
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if keys[pg.K_UP]:
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p.move(up=True)
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if keys[pg.K_DOWN]:
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p.move(down=True)
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if keys[pg.K_LEFT]:
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p.move(left=True)
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if keys[pg.K_RIGHT]:
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p.move(right=True)
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# Draw the background
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screen.blit(background, (0, 0))
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for e in pg.event.get():
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# quit upon screen exit
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if e.type == pg.QUIT:
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return
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for o in objects:
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screen.blit(background, o.pos, o.pos)
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for o in objects:
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o.move(right=True)
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screen.blit(o.image, o.pos)
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screen.blit(p.image, p.pos)
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clock.tick(60)
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pg.display.update()
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pg.time.delay(100)
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if __name__ == "__main__":
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main()
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pg.quit()
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