Pygame 拍摄地点

Question

我一直在尝试为我正在制作的游戏（基于疯狂上帝的境界）实现一项功能，您可以在点击的地方射击。为此，我一直在尝试使用毕达哥拉斯和运行的上升或三角形的梯度法则来计算 x 和 y 每次必须移动多远才能保持稳定的速度并每次都保持该速度我点击。我看到人们到处都在使用角度和 python 2 而我目前正在使用 python 3 因此使代码兼容比仅仅询问更棘手。我的代码使用类来创建障碍物和纹理。我使用数组在游戏循环中存储和创建子弹，并使用 pygames 矩形功能将它们绘制到屏幕上。请参阅下面的代码（不包括所有代码）。

import pygame, random, time
pygame.init()
shoot= []

class Projectiles(object):
    def __init__(self, pos):
        self.rect = pygame.Rect(pos[0], pos[1], 20, 20)
        shoot.append(self)

while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            quit()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_ESCAPE:
                pygame.quit()
                quit()

            if event.key == pygame.K_a:
                movement_status = pcharl
                x_change = 5
            if event.key == pygame.K_w:
                movement_status = pcharb
                y_change = 5
            if event.key == pygame.K_s:
                movement_status = pchar
                y_change = -5
            if event.key == pygame.K_d:
                movement_status = pcharr
                x_change = -5
            if event.key == pygame.K_e:
                pygame.display.toggle_fullscreen()

            if event.key == pygame.K_SPACE:
                shooting = True
                if movement_status == pcharl:
                    Projectiles((x, y))
                    direction = "left"
                    bx_change = -8
                    shooting = True
                if movement_status == pcharr:
                    Projectiles((x+30, y))
                    direction = "right"
                    bx_change = 8
                    shooting = True
                if movement_status == pcharb:
                    Projectiles((x + 30, y))
                    direction = "up"
                    by_change = -8
                    shooting = True
                if movement_status == pchar:
                    Projectiles((x + 30, y))
                    direction = "down"
                    by_change = 8
                    shooting = True
        if event.type == pygame.KEYUP:
            x_change = 0
            y_change = 0
        if event.type == pygame.MOUSEBUTTONDOWN:
            xm,ym = pygame.mouse.get_pos()
            shooting_arr = True
            if movement_status == pchar:
                Projectiles((x + 60, y))
                bullx = 560
            if movement_status == pcharb:
                Projectiles((x + 60, y))
                bullx = 560
            if movement_status == pcharr:
                Projectiles((x + 60, y))
                bullx = 560
            if movement_status == pcharl:
                Projectiles((x, y))
                bullx = 500
            for bullet in shoot:
                pygame.draw.rect(screen, (255, 100, 0), bullet.rect)
                xm = xm - bullx
                ym = ym - 500
                if xm % 2 == 0 and ym % 2 == 0:
                    xm = xm / 2
                    ym = ym / 2
                    xm = xm / ym
                    ym = ym / xm
                bx_change = xm
                by_change = ym
                print(str(xm) + " " + str(ym))
                xm = 0
                ym = 0
                shooting = True
    screen.fill((225, 50, 25))

    if shooting:
        for bullet in shoot:
            pygame.draw.rect(screen, (255, 0, 255), bullet.rect)
            bullet.rect.x += bx_change
            bullet.rect.y += by_change
            if bullet.rect.x <= 0:
                shoot.remove(bullet)
            if bullet.rect.x >= 1000:
                shoot.remove(bullet)
            if bullet.rect.y <= 0:
                shoot.remove(bullet)
            if bullet.rect.y >= 1000:
                shoot.remove(bullet)

x 和 y 等于 500 屏幕尺寸为 1000x1000

Answer 1

通过从鼠标光标位置减去玩家位置来创建矢量。然后使用该矢量通过将其添加到射弹位置来移动射弹。

这是一个简单的例子：

import pygame
import math

class Player(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.Surface((32, 32))
        self.image.fill((0, 0, 0))
        self.image.set_colorkey((0, 0, 0))
        pygame.draw.polygon(self.image, pygame.Color('dodgerblue'), ((0, 0), (16, 32), (32, 0)))
        self.org_image = self.image.copy()
        self.rect = self.image.get_rect(center=(200, 200))
        self.direction = pygame.Vector2(0, 1)

    def update(self, events, dt):
        for e in events:
            if e.type == pygame.MOUSEBUTTONDOWN:
                self.groups()[0].add(Projectile(self.rect.center, self.direction))


        self.direction = pygame.Vector2(pygame.mouse.get_pos()) - self.rect.center
        self.image = pygame.transform.rotate(self.org_image, math.degrees(math.atan2(*self.direction)))
        self.rect = self.image.get_rect(center=self.rect.center)

class Projectile(pygame.sprite.Sprite):
    def __init__(self, pos, direction):
        super().__init__()
        self.image = pygame.Surface((8, 8))
        self.image.fill((0, 0, 0))
        self.image.set_colorkey((0, 0, 0))
        pygame.draw.circle(self.image, pygame.Color('orange'), (4, 4), 4)
        self.rect = self.image.get_rect(center=pos)
        self.direction = direction.normalize()
        self.pos = pygame.Vector2(self.rect.center)

    def update(self, events, dt):
        self.pos += self.direction * dt
        self.rect.center = self.pos
        if not pygame.display.get_surface().get_rect().contains(self.rect):
            self.kill()

def main():
    pygame.init()
    screen = pygame.display.set_mode((500, 500))
    sprites = pygame.sprite.Group(Player())
    clock = pygame.time.Clock()
    dt = 0

    while True:
        events = pygame.event.get()
        for e in events:
            if e.type == pygame.QUIT:
                return
        sprites.update(events, dt)
        screen.fill((30, 30, 30))
        sprites.draw(screen)
        pygame.display.update()
        dt = clock.tick(60)

if __name__ == '__main__':
    main()

Pygame 拍摄地点

Pygame shooting to location

python

pygame

pythagorean