Question

我在pygame教程中有这个程序：

import sys, pygame
pygame.init()

size = width, height = 320, 240
speed = [2, 2]
black = 0, 0, 0

screen = pygame.display.set_mode(size)

ball = pygame.image.load("ball.bmp")
ballrect = ball.get_rect()

while 1:
    for event in pygame.event.get():
        if event.type == pygame.QUIT: sys.exit();
        ballrect = ballrect.move(speed)
        if ballrect.left < 0 or ballrect.right > width:
            speed[0] = -speed[0]
        if ballrect.top < 0 or ballrect.bottom > height:
            speed[1] = -speed[1] 

        screen.fill(black)
        screen.blit(ball, ballrect)
        pygame.display.flip()

这是一个简单的弹跳球。我想要的是用一个圆圈替换球（ball.gif），这个圆圈将使用pygame绘制，而不会对代码进行大的更改。我的意思是，我想改变的唯一一件事就是将球替换为圆圈，并使用与我用来设置球动画相同的代码动画该圆圈。有什么方法可以做到吗？感谢。

Answer 1

您只需要替换

screen.blit(ball, ballrect)

与

pygame.draw.circle(screen, color, ballrect.center, radius)

Pygame's draw module也允许绘制其他形状。在上面的代码中，您可以使用所需的值填充color和radius。 color是一个三元组的元组，范围为0-255。

Answer 2

我知道这已经过时了，但我很难搞清楚这一点，但我终于做到了。

{}

Answer 3

也许这就是您要找的。下载图片 from here.

import pygame
import sys

WIDTH, HEIGHT = 600,600
ROWS, COLS = 8,8
SQUARE_SIZE = WIDTH//COLS
WIDTH, HEIGHT = SQUARE_SIZE*COLS, SQUARE_SIZE*ROWS
WIN = pygame.display.set_mode((WIDTH, HEIGHT))
CLOCK = pygame.time.Clock()

class Ball:
    GRAVITY = 0.5
    def __init__(self, row, col):
        self.row = row
        self.col = col
        self.target_x = (SQUARE_SIZE*col)+SQUARE_SIZE/2
        self.target_y = (SQUARE_SIZE*row)+SQUARE_SIZE/2
        self.x = self.target_x
        self.y = 0
        self.vel = 10
        self.img = pygame.transform.scale(pygame.image.load("ball2.png"), (SQUARE_SIZE-20, SQUARE_SIZE-20))
        self.landed = False

    def draw(self):
        self.update()
        pygame.draw.circle(WIN, (0,255,0), (self.x, self.y), 15)
    
    def update(self):
        if not self.landed:
            self.vel += self.GRAVITY
            self.y += self.vel
            if self.y > self.target_y:
                self.vel = -(self.vel*0.70)
                if (abs(self.vel)<1):
                    self.landed = True
                self.y += self.vel


def draw_board(ball_list):
    WIN.fill((0,0,0))
    for row in range(ROWS):
        for col in range(row%2, COLS, 2):
            pygame.draw.rect(WIN, (255,0,0), (row*SQUARE_SIZE, col*SQUARE_SIZE, SQUARE_SIZE, SQUARE_SIZE))

def create_balls(ball_list):
    x = []
    for row in range(ROWS):
        for col in range(COLS):
            if ball_list[row][col] ==1: x.append(Ball(row, col))
    return x
    
def main():
    ball_list = [
        [0,0,0,1,0,0,0,1],
        [1,0,1,0,0,0,0,1],
        [0,0,0,1,0,1,0,0],
        [0,0,1,1,0,0,0,1],
        [1,0,0,0,0,1,0,0],
        [0,0,0,0,1,0,0,1],
        [0,1,0,0,0,1,0,0],
        [0,0,1,0,0,0,1,0],
    ]
    balls = create_balls(ball_list)

    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                sys.exit()


        draw_board(ball_list)
        for ball in balls:
            ball.draw()
        pygame.display.update()
        CLOCK.tick(60)

main()

Pygame简单的弹跳动画

3 个答案: