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@phorsfall
Created February 1, 2012 10:18
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require 'drb'
# ruby-serial was crashing Shoes so run serial code in another process using DRb to
# communicate the state of the controller.
pid = Process.fork { exec('ruby', 'controller.rb') }
Shoes.app :width => 938, :height => 768, :resizable => false do
# Start the DRb client.
DRb.start_service
@controller = DRbObject.new nil, 'druby://localhost:7777'
background 'images/background.png'
x = y = _x = _y = nil
screen_width, screen_height = 670, 477
default_pen_color = '#555'
@sketch = flow do
stroke default_pen_color
translate 138, 135
keypress do |key|
case key
when 'c'
clear
when 'q'
# Quitting the app by any other method will leave the background thread behind.
Process.kill('HUP', pid)
exit
when '1'..'9'
strokewidth key.to_i
when "\e"
strokewidth 1
stroke default_pen_color
when 'r'
stroke red
when 'b'
stroke blue
when 'g'
stroke green
when 'y'
stroke yellow
end
end
animate do
# Clear the screen if the tile switch is activated.
clear if @controller.t == 1
x = @controller.x/1024.0 * screen_width
y = @controller.y/1024.0 * screen_height
if(_x and _y and (x != _x or y != _y))
append do
line _x, _y, x, y
end
end
_x, _y = x, y
end
end
end
#!/usr/bin/env ruby -w
require 'drb'
require 'serialport'
port = '/dev/tty.usbserial-A70061Un'
baud_rate = 9600
data_bits = 8
stop_bits = 1
parity = SerialPort::NONE
sp = SerialPort.open(port, baud_rate, data_bits, stop_bits, parity)
# Simple class to represent the state of the controller.
class ControllerState
attr_accessor :x, :y, :t
end
state = ControllerState.new
DRb.start_service 'druby://:7777', state
puts DRb.uri
input = value = ''
while true do
c = sprintf("%c", sp.getc)
print c
if %w(x y t).include?(c)
state.send "#{input}=", value.to_i unless input.empty?
input = c
value = ''
else
value << c
end
end
# Never reached...
DRb.thread.join
sp.close
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