當(dāng)大圓圈接觸小圓圈時(shí)，我希望它接觸的小圓圈從屏幕上消失。然而，我不知道你到底是如何刪除 pygame 中的單個(gè)繪圖的。我該如何解決這個(gè)問題？pygame有內(nèi)置這個(gè)功能嗎？from pygame import *import random as rdimport math as minit()screen = display.set_mode((800, 600))p_1_x = 200p_1_y = 200p_1_change_x = 0p_1_change_y = 0def p_1(x, y): player_1 = draw.circle(screen, (0, 0, 0), (x, y), 15)def pick_up(x, y, xx, yy): distance = m.sqrt(m.pow(xx - x, 2) + m.pow(yy - y, 2)) if distance < 19: # I think the code to delete should go here passdots = []locations = []for i in range(5): x = rd.randint(100, 700) y = rd.randint(100, 500) locations.append((x, y))while True: screen.fill((255, 255, 255)) for events in event.get(): if events.type == QUIT: quit() if events.type == KEYDOWN: if events.key == K_RIGHT: p_1_change_x = 1 if events.key == K_LEFT: p_1_change_x = -1 if events.key == K_UP: p_1_change_y += 1 if events.key == K_DOWN: p_1_change_y -= 1 if events.type == KEYUP: if events.key == K_RIGHT or K_LEFT or K_UP or K_DOWN: p_1_change_x = 0 p_1_change_y = 0 p_1_x += p_1_change_x p_1_y -= p_1_change_y for i, locate in enumerate(locations): dot = draw.circle(screen, (0, 0, 0), locate, 5) dots.append(dot) for l in enumerate(locate): pick_up(p_1_x, p_1_y, locate[0], locate[1]) p_1(p_1_x, p_1_y) display.update()
2 回答
拉風(fēng)的咖菲貓
TA貢獻(xiàn)1995條經(jīng)驗(yàn) 獲得超2個(gè)贊
你的代碼是如此混亂且難以維護(hù)，首先我為球和點(diǎn)制作了 2 個(gè)類。我通過 檢測(cè)碰撞pygame.Rect.colliderect，首先我制作 2 個(gè)矩形，然后檢查碰撞，如下所示：
def pick_up(ball, dot):
ball_rect = Rect( ball.x - ball.SIZE , ball.y - ball.SIZE , ball.SIZE*2, ball.SIZE*2)
dot_rect = Rect( dot.x - dot.SIZE , dot.y - dot.SIZE , dot.SIZE*2, dot.SIZE*2)
if ball_rect.colliderect(dot_rect):
return True
return False
如果檢測(cè)到碰撞，我將其從循環(huán)中的點(diǎn)數(shù)組中刪除while：
for dot in dots:
if pick_up(ball, dot): # if dot in range ball
dots.remove(dot)
dot.draw()
這是完整的來源：
from pygame import *
import random as rd
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
NUMBER_OF_DOTS = 5
class Ball():
SIZE = 15
def __init__(self, x, y):
self.x = x
self.y = y
def draw(self):
draw.circle(screen, (0, 0, 0), (self.x, self.y), Ball.SIZE)
def move(self, vx, vy):
self.x += vx
self.y += vy
class Dot():
SIZE = 5
def __init__(self, x, y):
self.x = x
self.y = y
def draw(self):
draw.circle(screen, (0, 0, 0), (self.x, self.y), Dot.SIZE)
def pick_up(ball, dot):
ball_rect = Rect( ball.x - ball.SIZE , ball.y - ball.SIZE , ball.SIZE*2, ball.SIZE*2)
dot_rect = Rect( dot.x - dot.SIZE , dot.y - dot.SIZE , dot.SIZE*2, dot.SIZE*2)
if ball_rect.colliderect(dot_rect):
return True
return False
init()
screen = display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
dots = []
ball = Ball(200,200)
# generate dots
for i in range(NUMBER_OF_DOTS):
x = rd.randint(100, 700)
y = rd.randint(100, 500)
dots.append(Dot(x,y))
# the main game loop
while True:
screen.fill((255, 255, 255))
keys=key.get_pressed()
for events in event.get():
keys=key.get_pressed()
if events.type == QUIT:
quit()
if keys[K_RIGHT]:
ball.move(+1,0)
if keys[K_LEFT]:
ball.move(-1,0)
if keys[K_UP]:
ball.move(0,-1)
if keys[K_DOWN]:
ball.move(0,+1)
for dot in dots:
dot.draw()
if pick_up(ball, dot):
dots.remove(dot)
ball.draw()
display.update()
time.delay(1) # Speed down
更新1：
PyGame 矩形碰撞 http://www.pygame.org/docs/ref/rect.html#pygame.Rect.colliderect
更新2：
我在 github 上做了一個(gè) repo 并做了一些更改，
點(diǎn)是彩色的，新點(diǎn)的顏色是隨機(jī)的，每當(dāng)吃掉一個(gè)點(diǎn)時(shí)，球就會(huì)變大。
小怪獸愛吃肉
TA貢獻(xiàn)1852條經(jīng)驗(yàn) 獲得超1個(gè)贊
代碼應(yīng)該將其從locations列表中刪除，以便將來不會(huì)重新繪制。你每一幀都清除屏幕，所以清除+不重畫就是“刪除”。
假設(shè)您修改pick_up()為僅返回 True 或 False：
def pick_up(x, y, xx, yy):
result = False
distance = m.sqrt(m.pow(xx - x, 2) + m.pow(yy - y, 2))
if distance < 19:
result = True # It was picked
return result
然后，當(dāng)您迭代locations列表繪圖并檢查是否被拾取時(shí)，保存所拾取圓的索引，然后在locations第二步中將它們從列表中刪除。使用兩步形式意味著如果您在迭代列表時(shí)從列表中刪除項(xiàng)目，則不必?fù)?dān)心意外跳過項(xiàng)目。
p_1_x += p_1_change_x
p_1_y -= p_1_change_y
picked_up = [] # empty list to hold "picked" items
for i, locate in enumerate(locations):
dot = draw.circle(screen, (0, 0, 0), locate, 5)
dots.append(dot)
for l in enumerate(locate):
if ( pick_up(p_1_x, p_1_y, locate[0], locate[1]) ):
picked_up.append( i ) # save the index of anything "picked"
# remove any picked-up circles from the list
for index in sorted( picked_up, reverse=True ): # start with the highest index first
print( "Removing circle from location[%d]" % ( index ) ) # DEBUG
del( locations[ index ] )
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