# jun hirabayashi jun@hirax.net 2009.12.02

class Accelerometer
  require 'Win32API'

  attr_accessor :x
  attr_accessor :y
  attr_accessor :temperature
  attr_accessor :presentState

  def initialize
    begin
      @sensorFunctionAPI=Win32API.new("Sensor",
        "ShockproofGetAccelerometerData", ['P'], 'V')
      @buffer=' '*17
      if @sensorFunctionAPI.Call(@buffer)
        parse(@buffer)
        @offsetX=-@latestRawAccelDataX.to_i;
        @offsetY=-@latestRawAccelDataY.to_i; 
      end
    rescue
      'We have some problem.'
      exit!
    end
  end
  
  def parse(result)
    @presentState,@latestRawAccelDataX,@latestRawAccelDataY,@latestAccelDataX,@atestAccelDataY,@temperature,@atestZeroG_X,@atestZeroG_Y=result.unpack("iSSSSCSS")
  end 

  def getAccelerometerData
     @sensorFunctionAPI.Call(@buffer)
     parse(@buffer)
     @x=@latestRawAccelDataX.to_i+@offsetX.to_i;
     @y=@latestRawAccelDataY.to_i+@offsetY.to_i;
     return [@x,@y]
  end
end

=begin
# sample
accelerometer=Accelerometer.new
10.times{ |i|
  puts accelerometer.getAccelerometerData.join(',')
  sleep 1
}
=end