How To Make Sprite Move Upwards And Downwards With Joystick In Pygame
Solution 1:
First ensure that you have a joystick, by getting the number of joysticks by pygame.joystick.get_count()
. Initialize the joystick by pygame.joystick.Joystick.init
:
joystick = Noneif pygame.joystick.get_count() > 0:
joystick = pygame.joystick.Joystick(0)
joystick.init()
Once a joystick is initialized, ist axis value can be get by pygame.joystick.Joystick.get_axis
. The value returned by this function is in range [-1, 1]. -1 for the maximum negative tilt and +1 for the maximum positive tilt.
Note, each analog stick of a gamepad or joystick has 2 axis, one for the horizontal direction and 1 for the vertical direction. Since the amount of the value returned by get_axis()
depends on the tilting of the analog stick you should multiply the speed by the value.
Further you should ignore values near 0 for the dead center, because of the inaccuracy of the hardware. This can be don by a simple check using the built in function abs(x)
e.g. abs(axisval) > 0.1
:
if joystick:
axis_x, axis_y = (joystick.get_axis(0), joystick.get_axis(1))
ifabs(axis_x) > 0.1:
player_one.speed_x = 5 * axis_x
ifabs(axis_y) > 0.1:
player_one.speed_y = 5 * axis_y
See the following simple demo app:
import pygame
pygame.init()
size = (800,600)
screen = pygame.display.set_mode(size)
clock = pygame.time.Clock()
pos = [size[0]/2, size[1]/2]
speed = 5
joystick = None
done = Falsewhilenot done:
clock.tick(60)
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = Trueelif event.type == pygame.KEYDOWN:
if event.key==pygame.K_RETURN:
done = Trueif joystick:
axis_x, axis_y = (joystick.get_axis(0), joystick.get_axis(1))
ifabs(axis_x) > 0.1:
pos[0] += speed * axis_x
ifabs(axis_y) > 0.1:
pos[1] += speed * axis_y
else:
if pygame.joystick.get_count() > 0:
joystick = pygame.joystick.Joystick(0)
joystick.init()
print("joystick initialized")
screen.fill((0, 0, 255))
pygame.draw.rect(screen, (255,255,255), (*pos, 10, 10))
pygame.display.flip()
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