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#!/usr/bin/python
"""scalesgui.py
<http://abstrakraft.org/cwiid/attachment/ticket/63/scalesgui.py>
"""
import sys
try:
import pygame
except:
print "Sorry, I can't seem to import pygame for some reason."
print "Please check that the python-pygame package is installed, or get the latest version of pygame from http://www.pygame.org/"
sys.exit(1)
try:
import cwiid
except:
print "Sorry, I can't seem to import cwiid for some reason."
print "Please check that it and it's python bindings are installed, and also the balance board patch from:"
print "http://abstrakraft.org/cwiid/ticket/63"
sys.exit(1)
import os, math, random
import time as ptime
from pygame.locals import *
from ConfigParser import ConfigParser
from threading import Thread
class WeightSprite(pygame.sprite.Sprite):
"""This class describes a sprite containing the weight."""
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.weight = 0.0
self.update()
def update(self):
global screen_res, sys_font_weight_fgcolour, sys_font_weight, screen_res
if self.weight > 2:
self.text = "%.2f" % self.weight
else:
self.text = "_.__"
#print "LESS THAN 2"
#while len(self.text) < 4:
# self.text = "0" + self.text
self.image = sys_font_weight.render(self.text, True, sys_font_weight_fgcolour)
self.rect = self.image.get_rect()
self.rect.bottomright = screen_res
def quit_app():
pygame.quit()
sys.exit(0)
def calcweight( readings, calibrations ):
"""
Determine the weight of the user on the board in hundredths of a kilogram
"""
weight = 0
for sensor in ('right_top', 'right_bottom', 'left_top', 'left_bottom'):
reading = readings[sensor]
calibration = calibrations[sensor]
#if reading < calibration[0]:
# print "Warning, %s reading below lower calibration value" % sensor
if reading > calibration[2]:
print "Warning, %s reading above upper calibration value" % sensor
# 1700 appears to be the step the calibrations are against.
# 17kg per sensor is 68kg, 1/2 of the advertised Japanese weight limit.
if reading < calibration[1]:
weight += 1700 * (reading - calibration[0]) / (calibration[1] - calibration[0])
else:
weight += 1700 * (reading - calibration[1]) / (calibration[2] - calibration[1]) + 1700
return weight
def gsc(readings, pos):
global named_calibration
reading = readings[pos]
calibration = named_calibration[pos]
if reading < calibration[1]:
return 1700 * (reading - calibration[0]) / (calibration[1] - calibration[0])
else:
return 1700 * (reading - calibration[1]) / (calibration[2] - calibration[1]) + 1700
print "Please press the red 'connect' button on the balance board, inside the battery compartment."
print "Do not step on the balance board."
global wiimote
if len(sys.argv) > 1:
wiimote = cwiid.Wiimote(sys.argv[1])
else:
wiimote = cwiid.Wiimote()
wiimote.rpt_mode = cwiid.RPT_BALANCE | cwiid.RPT_BTN
wiimote.request_status()
balance_calibration = wiimote.get_balance_cal()
named_calibration = { 'right_top': balance_calibration[0],
'right_bottom': balance_calibration[1],
'left_top': balance_calibration[2],
'left_bottom': balance_calibration[3],
}
system_file = "system.ini"
if not os.path.lexists(system_file):
print "Problem: System configuration file (system.ini) doesn't exist."
sys.exit(1)
sconf = ConfigParser()
sconf.read(system_file)
xdisplay = sconf.get("display", "xdisplay")
if len(xdisplay) > 1:
# using alternate display.
print "Attempting to use device", xdisplay, "instead of the default."
os.putenv("DISPLAY", xdisplay)
pygame.init()
sys_font_weight = pygame.font.SysFont(sconf.get("font_weight", "face"), int(sconf.get("font_weight", "size")))
sys_font_weight.set_italic(False)
sys_font_weight.set_underline(False)
bgcolour = (0, 0, 0)
sys_font_weight_fgcolour = (255, 255, 255)
screen_res = (int(sconf.get("display", "width")), int(sconf.get("display", "height")))
refresh_delay = int(sconf.get("display", "refresh_delay"))
screen_options = 0
if int(sconf.get("display", "fullscreen")) >= 1 and len(xdisplay) <= 1:
screen_options = screen_options | pygame.FULLSCREEN
if int(sconf.get("display", "double_buffers")) >= 1:
screen_options = screen_options | pygame.DOUBLEBUF
if int(sconf.get("display", "hardware_surface")) >= 1:
screen_options = screen_options | pygame.HWSURFACE
if int(sconf.get("display", "opengl")) >= 1:
screen_options = screen_options | pygame.OPENGL
screen = pygame.display.set_mode(screen_res, screen_options)
pygame.display.set_caption("scales application")
weight_sprite = WeightSprite()
weight_sprite.weight = 40.33
frame = 0
while True:
for event in pygame.event.get():
if event.type == KEYDOWN:
if event.key == K_F12:
quit_app()
wiimote.request_status()
frame = frame + 1
if frame == 50:
frame = 0
weight = (calcweight(wiimote.state['balance'], named_calibration) / 100.0)
#print "%.2fkg" % weight
weight_sprite.weight = weight
readings = wiimote.state['balance']
try:
x_balance = (float(gsc(readings,'right_top')+gsc(readings,'right_bottom'))) / (float(gsc(readings,'left_top')+gsc(readings,'left_bottom')))
if x_balance > 1:
x_balance = (((float(gsc(readings,'left_top')+gsc(readings,'left_bottom'))) / (float(gsc(readings,'right_top')+gsc(readings,'right_bottom'))))*-1.)+1.
else:
x_balance = x_balance -1.
y_balance = (float(gsc(readings,'left_bottom')+gsc(readings,'right_bottom'))) / (float(gsc(readings,'left_top')+gsc(readings,'right_top')))
if y_balance > 1:
y_balance = (((float(gsc(readings,'left_top')+gsc(readings,'right_top'))) / (float(gsc(readings,'left_bottom')+gsc(readings,'right_bottom'))))*-1.)+1.
else:
y_balance = y_balance -1.
except:
x_balance = 1.
y_balance = 1.
#print "readings:",readings
screen.fill(bgcolour) # blank the screen.
# line up the lines
pygame.draw.line(screen, (0,0,255), (screen_res[0]/2,0), (screen_res[0]/2,screen_res[1]), 2)
pygame.draw.line(screen, (0,0,255), (0,screen_res[1]/2), (screen_res[0],screen_res[1]/2), 2)
weight_sprite.update()
screen.blit(weight_sprite.image, weight_sprite.rect)
xpos = (x_balance * (screen_res[0]/2)) + (screen_res[0]/2)
ypos = (y_balance * (screen_res[1]/2)) + (screen_res[1]/2)
#print "balance:", x_balance, y_balance
#print "position:", xpos,ypos
pygame.draw.circle(screen, (255,0,0), (int(xpos), int(ypos)), 5)
pygame.display.flip()
pygame.time.wait(refresh_delay)
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