User:Birgit Bachler/techday motion

Motion Assignment

Step1: Making the iSight Camera work in Ubuntu

# cd
# mkdir /mnt/macosx
# mount /dev/sda2 /mnt/macosx
# cp /mnt/macosx/System/Library/Extensions/
     IOUSBFamily.kext/Contents/PlugIns/AppleUSBVideoSupport.kext/
     Contents/MacOS/AppleUSBVideoSupport .
# umount /mnt/macosx


# sudo apt-get install isight-firmware-tools
# cd
# ift-extract -a ./AppleUSBVideoSupport

# /etc/init.d/hal restart

See: http://handyfloss.net/2008.07/making-isight-camera-work-in-ubuntu/

Step2: Messing around with the motion.py script

#!/usr/bin/python

import sys
from os import system
import pygame
from pygame.locals import *
from pygame.time import Clock
from time import sleep
import thread
from pygame.locals import *




def reader ():
    while True:
    	line = sys.stdin.readline()
    	if (not line): break
    	line = line.strip()
    	if line.startswith("motion"):
    		# print "read motion data:", line   
    		(x, y, w, h, numpixels) = [int(x) for x in line.split()[1:]]
    		evt = pygame.event.Event(USEREVENT, {"x" : x, "y": y, "w":w, "h":h})
    		pygame.event.post(evt)
(rx, ry, rw, rh) = (0, 0, 0, 0)
(mx, my, mw, mh) = (10, 10, 50, 50)
pygame.init()
# screen = pygame.display.set_mode((640, 480), FULLSCREEN, 32)
screen = pygame.display.set_mode((640, 480), 0, 32)
pygame.display.set_caption("motionbox")
clock = Clock()

thread.start_new_thread(reader, ())



while True:
	for event in pygame.event.get():
		if event.type==QUIT or \
		(event.type == KEYDOWN and event.key == K_ESCAPE):
			sys.exit()
		elif event.type == USEREVENT:

			# print event

			mx = event.x
			my = event.y
			mw = event.w
			mh = event.h
			# adjust mx, my (as they are a center point)
			mx -= mw/2
			my -= mh/2
        rx += 0.25*(mx-rx)
        ry += 0.25*(my-ry)
        rw += 0.25*(mw-rw)
        rh += 0.25*(mh-rh)
        #xx= mx*100
        sliderw = float(rw) / 480
        sliderh = float(rh) / 640
        c = int(sliderw * 255)
        d = int(sliderh * 255)
        screen.fill((c, 0, d))
	pygame.draw.rect(screen, (d, d, d), (rx, ry, rw, rh), 1)
	pygame.display.update()
	clock.tick(30)