郎朗坤
要检测 2 个圆(分别是球)是否发生碰撞,您必须测试圆中心点之间的欧几里得距离是否小于半径之和。我建议使用pygame.math.Vector2/distance_to()进行计算。在下文中,圆 1 由圆心(x1, y1)和半径r1定义。第二个圆由(x2, y2)和r2定义:v1 = pygame.math.Vector2(x1, y1)
v2 = pygame.math.Vector2(x2, y2)
if v1.distance_to(v2) < r1 + r2:
print("hit")如果你想让圆圈弹跳,你必须像台球一样在交点的法向量处反映圆圈的运动矢量。使用 pygame.math.Vector2/reflect_ip()或reflect()计算圆的新方向。圆圈的运动由(mx1, my1)和 (mx2, my2)给出:nv = v2 - v1
m1 = pygame.math.Vector2(mx1, my1).reflect(nv)
m2 = pygame.math.Vector2(mx2, my2).reflect(nv)
mx1, my1 = m1.x, m1.y
mx2, my2 = m2.x, m2.yimport pygamepygame.init()width, height = 400, 400window = pygame.display.set_mode((width, height))clock = pygame.time.Clock()x1, y1, r1, mx1, my1 = 200, 200, 50, 2, 0.5x2, y2, r2, mx2, my2 = 300, 200, 50, -1, -1.5def move(c, v, r, m): c += v if c < r: c, v = r, -v if c > m-r: c, v = m-r, -v return c, vhit_count = 0run = Truewhile run: clock.tick(60) for event in pygame.event.get(): if event.type == pygame.QUIT: run = False x1, mx1 = move(x1, mx1, r1, width) y1, my1 = move(y1, my1, r1, height) x2, mx2 = move(x2, mx2, r2, width) y2, my2 = move(y2, my2, r2, height) v1 = pygame.math.Vector2(x1, y1) v2 = pygame.math.Vector2(x2, y2) if v1.distance_to(v2) < r1 + r2 - 2: hit_count += 1 print("hit:", hit_count) nv = v2 - v1 m1 = pygame.math.Vector2(mx1, my1).reflect(nv) m2 = pygame.math.Vector2(mx2, my2).reflect(nv) mx1, my1 = m1.x, m1.y mx2, my2 = m2.x, m2.y window.fill((127, 127, 127)) pygame.draw.circle(window, (255, 0, 0), (round(x1), round(y1)), r1, 4) pygame.draw.circle(window, (0, 0, 255), (round(x2), round(y2)), r2, 4) pygame.display.flip()