Using fonts (Simple)

Frequently there is a need to display some text, for instance, a counter or a message.

How to do it...

Pygame has a font module that can help us to show text.

  1. Creating a font: We can create a font by specifying, the font filename, and font size as constructor parameters:
    font = pygame.font.Font('freesansbold.ttf', 32)
  2. Displaying text: Since we made an image move around the edge in the previous recipe, it would be great to display a counter and the position of the image in the center of the screen with a blue background and red letters. The following code snippet accomplishes this:
    text = "%d %d %d" % (i, pos[i][0], pos[i][1])
rendered = font.render(text, True, RED, BLUE)
screen.blit(rendered, (150, 200))

    Note

    A screenshot of the animation is shown as follows and should be on YouTube too at https://www.youtube.com/watch?v=xhjfcFhaXN0.

    How to do it...

    The code is almost the same as for the previous recipe, with the addition of code for the creation and display of fonts:

    import pygame, sys
from pygame.locals import *
import numpy

pygame.init()
clock = pygame.time.Clock()
screen = pygame.display.set_mode((400, 400))

pygame.display.set_caption('Animating Objects')
img = pygame.image.load('head.jpg')

steps = numpy.linspace(20, 360, 40).astype(int)
right = numpy.zeros((2, len(steps)))
down = numpy.zeros((2, len(steps)))
left = numpy.zeros((2, len(steps)))
up = numpy.zeros((2, len(steps)))

right[0] = steps
right[1] = 20

down[0] = 360
down[1] = steps
left[0] = steps[::-1]
left[1] = 360

up[0] = 20
up[1] = steps[::-1]

pos = numpy.concatenate((right.T, down.T, left.T, up.T))
i = 0

# create a font
font = pygame.font.Font('freesansbold.ttf', 32)
RED = (255, 0, 0)
BLUE = (0, 0, 255)

while True: 
   # Erase screen
   screen.fill((255, 255, 255))

   if i >= len(pos):
      i = 0

   screen.blit(img, pos[i])

   # displaying text in the center of the screen
   text = "%d %d %d" % (i, pos[i][0], pos[i][1])
   rendered = font.render(text, True, RED, BLUE)
   screen.blit(rendered, (150, 200))
   i += 1

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

   pygame.display.update()
   clock.tick(30)
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