Object Game in Raspberry Pi using Pygame

It is easy to build falling balls in Pygame and try to use the sleep function to delay the balls.

Video in youtube:

Remote Desktop to Raspberry Pi from Windows 7

How to log in as Remote Desktop to Raspberry Pi from Windows 7 PC

In order to remote log in RaspberryPi , we have to install xrdp. Following steps can be used for install the software .

Install the xrdp software in  Raspberry Pi

sudo apt-get install xrdp

in order to know the status of xrdp , we can use the following command

/etc/init.d/xrdp status

For starting , use the below command

/etc/init.d/xrdp start

For stoping , /etc/init.d/xrdp stop

make sure your xrdp running in Raspberry Pi

In windows 7 PC, we will be getting the 'Remote Desktop Connection' from the start menu.

Enter the IP address of your raspberry pi in the computer field, and connect.

Raspberry Pi connecting with Joystick in Pygame

Programming Joystick gaming with Raspberry pi

Install joystick using the command below:

sudo apt-get install joystick

after installation you can find file js0 in the directory:

/dev/input/

sudo cat /dev/input/js0

sudo cat /dev/input/js0 | hexdump

Pygame program to read joystick buttons

joystick = pg.joystick.Joystick(0)
joystick.init()

pg.joystick.joystick(0) returns the joystick object and init() function initialize the device values.

 button1 = joystick.get_button(0) retrives the button(0)

below program includes functions to read the keyboard input and mouse inputs. 

Pygame Joystick program:

import pygame as pg
# initialize pygame
pg.init()

# use an image you have (.bmp  .jpg  .png  .gif)
image_file = "ball"
# RGB color tuple for screen background
black = (0,0,0)
# screen width and height
sw = 640
sh = 480
# create a screen
screen = pg.display.set_mode((sw, sh))
# give the screen a title
pg.display.set_caption('image follows mouse click position')
# load an image
# convert() unifies the pixel format for faster blit
image = pg.image.load(image_file).convert()
# get the rectangle the image occupies
# rec(x, y, w, h)
start_rect = image.get_rect()
image_rect = start_rect
running = True
joystick = pg.joystick.Joystick(0)
joystick.init()
while running:
    event = pg.event.poll()
    keyinput = pg.key.get_pressed()
    button3 = joystick.get_button(2)
    button1 = joystick.get_button(0)
    # exit on corner 'x' click or escape key press
    if keyinput[pg.K_ESCAPE]:
        raise SystemExit
    elif event.type == pg.QUIT:
        running = False
    elif keyinput[pg.K_LEFT]:
        image_rect.left = image_rect.left - 1
        image_rect.right = image_rect.right-1
        print "corner coordinates --> (%d, %d, %d, %d)" % \
            (image_rect.left, image_rect.top, image_rect.right,
            image_rect.bottom)

        screen.fill(black)

    elif keyinput[pg.K_RIGHT]:
        image_rect.left = image_rect.left + 1
        image_rect.right = image_rect.right+1
        screen.fill(black)
        screen.blit(image, image_rect)
        pg.display.flip()
    elif keyinput[pg.K_DOWN]:
        image_rect.top = image_rect.top + 1
        image_rect.bottom = image_rect.bottom+1
        screen.fill(black)
        screen.blit(image, image_rect)
        pg.display.flip()

    elif keyinput[pg.K_UP]:
        image_rect.top = image_rect.top - 1
        image_rect.bottom = image_rect.bottom-1
        screen.fill(black)
        screen.blit(image, image_rect)
        pg.display.flip()

    elif button3:
        print("Joystick up pressed")
        image_rect.top = image_rect.top - 1
        image_rect.bottom = image_rect.bottom-1
        screen.fill(black)
        screen.blit(image, image_rect)
        pg.display.flip()

    elif button1:
        print("Joystick down pressed")
        image_rect.top = image_rect.top + 1
        image_rect.bottom = image_rect.bottom+1
        screen.fill(black)
        screen.blit(image, image_rect)
        pg.display.flip()
 

Pygame built with Raspberry Pi & Joystick