python - PyGame - 带阴影的文本

Question

我有一个作业，我们需要创建函数以在 python/pygame 中将文本显示到屏幕上。这部分我明白了。我不知道的是你应该创建一个创建阴影的函数。我知道如何制作阴影，但我只是不知道如何制作另一个函数来完成它，并且可以选择从预先存在的文本中进行调用。这是我到目前为止所拥有的

import pygame
import sys
pygame.init()

screenSizeX = 1080
screenSizeY = 720
screenSize = (screenSizeX,screenSizeY)
screen = pygame.display.set_mode(screenSize,0)
pygame.display.set_caption("Test Functions")

WHITE = (255,255,255)
GREEN = (0,255,0)
BLUE = (0,0,255)
RED = (255,0,0)
YELLOW = (255,255,0)
BLACK = (0,0,0)
MAGENTA = (139,0,139)

def horCenter(font, size, text, colour, y, shadow, pos):
    if shadow == True:

    fontTitle = pygame.font.SysFont(font, size)
    textTitle = fontTitle.render(text, True, colour)
    textWidth = textTitle.get_width()
    screen.blit(textTitle, (screenSizeX/2 - textWidth/2, y))

def verCenter(font, size, text, colour, x):
    fontTitle = pygame.font.SysFont(font, size)
    textTitle = fontTitle.render(text, True, colour)
    textHeight = textTitle.get_height()
    screen.blit(textTitle, (x, screenSizeY/2 - textHeight/2))

def cenCenter(font, size, text, colour):
    fontTitle = pygame.font.SysFont(font, size)
    textTitle = fontTitle.render(text, True, colour)
    textHeight = textTitle.get_height()
    textWidth = textTitle.get_width()
    screen.blit(textTitle, (screenSizeX/2 - textWidth/2, screenSizeY/2 - textHeight/2))   




pygame.display.update()

go = True
while go:
    for event in pygame.event.get():
        if event.type ==pygame.QUIT:
            go = False


    screen.fill(WHITE)
    horCenter("Comic Sans MS", 40, "Text1", MAGENTA, 100)
    verCenter("Georgia", 10, "Tex2", GREEN, 500)
    cenCenter("Impact", 50, "Text3", RED)
    verCenter("Verdana", 60, "89274", BLACK, 50)
    pygame.display.update()

pygame.quit()
sys.exit()

Answer 1

可以通过绘制文本两次来渲染阴影。第一个是偏移处文本的灰色版本，然后是原始位置的实际文本。

def dropShadowText(screen, text, size, x, y, colour=(255,255,255), drop_colour=(128,128,128), font=None):
    # how much 'shadow distance' is best?
    dropshadow_offset = 1 + (size // 15)
    text_font = pygame.font.Font(font, size)
    # make the drop-shadow
    text_bitmap = text_font.render(text, True, drop_colour)
    screen.blit(text_bitmap, (x+dropshadow_offset, y+dropshadow_offset) )
    # make the overlay text
    text_bitmap = text_font.render(text, True, colour)
    screen.blit(text_bitmap, (x, y) )

所以你可以这样调用它:

dropShadowText(screen, "Hello World", 36, 50, 50)