89 lines
2.1 KiB
Python
89 lines
2.1 KiB
Python
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""" pg.examples.go_over_there
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This simple tech demo is showcasing the use of Vector2.move_towards()
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using multiple circles to represent Vectors. Each circle will have a
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random position and speed once the demo starts.
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Mouse Controls:
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* Use the mouse to click on a new target position
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Keyboard Controls:
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* Press R to restart the demo
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"""
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import pygame as pg
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import random
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MIN_SPEED = 0.25
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MAX_SPEED = 5
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MAX_BALLS = 1600
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SCREEN_SIZE = pg.Vector2(1000, 600)
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CIRCLE_RADIUS = 5
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pg.init()
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screen = pg.display.set_mode(SCREEN_SIZE)
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clock = pg.time.Clock()
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target_position = None
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balls = []
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class Ball:
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def __init__(self, position, speed):
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self.position = position
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self.speed = speed
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def reset():
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global balls
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global target_position
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target_position = None
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balls = []
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for x in range(MAX_BALLS):
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pos = pg.Vector2(
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random.randint(0, SCREEN_SIZE.x), random.randint(0, SCREEN_SIZE.y)
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)
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speed = random.uniform(MIN_SPEED, MAX_SPEED)
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b = Ball(pos, speed)
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balls.append(b)
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reset()
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delta_time = 0
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running = True
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while running:
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for event in pg.event.get():
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if event.type == pg.QUIT:
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running = False
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if event.type == pg.MOUSEBUTTONUP:
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target_position = pg.mouse.get_pos()
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if event.type == pg.KEYUP:
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if event.key == pg.K_ESCAPE:
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running = False
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if event.key == pg.K_r:
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reset()
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screen.fill((31, 143, 65))
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for o in balls:
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if target_position is not None:
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try:
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o.position.move_towards_ip(target_position, o.speed * delta_time)
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except AttributeError:
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raise RuntimeError(
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f"""Version {pg.__version__} doesn't have Vector.move_towards_ip function.
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Please update to >=2.1.3"""
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)
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pg.draw.circle(screen, (118, 207, 145), o.position, CIRCLE_RADIUS)
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pg.display.flip()
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delta_time = clock.tick(60)
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pg.display.set_caption(
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f"fps: {round(clock.get_fps(), 2)}, ball count: {len(balls)}"
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)
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pg.quit()
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