The Eye Tribe Developer Forum 2014-03-05T19:07:38+02:00 http://theeyetribe.com/forum/feed.php?f=25&t=128 2014-03-05T19:07:38+02:00 2014-03-05T19:07:38+02:00 http://theeyetribe.com/forum/viewtopic.php?t=128&p=514#p514 <![CDATA[Re: polling data issue (with source code)]]> Thanks for your swift reply Martin!
The eye tribe eye tracker is as accurate as any other eye trackers I've used before, yet with a much consumer-friendly price tag. Great work!

Statistics: Posted by skatawxz — 05 Mar 2014, 19:07

]]> 2014-03-05T18:33:15+02:00 2014-03-05T18:33:15+02:00 http://theeyetribe.com/forum/viewtopic.php?t=128&p=513#p513 <![CDATA[Re: polling data issue (with source code)]]>
Whatever, I think the CallBack function used in C plus plus for receiving data is good. You can add some variables used for gaze data return, then you received the data in your main function.

Do you think?

Statistics: Posted by skatamingxinbit@gmail.com — 05 Mar 2014, 18:33

]]> 2014-03-05T18:00:00+02:00 2014-03-05T18:00:00+02:00 http://theeyetribe.com/forum/viewtopic.php?t=128&p=510#p510 <![CDATA[Re: polling data issue (with source code)]]>
The next update for the C++ SDK will make all get-data calls to the server in blocking-mode so that it returns upon calling like it should.

Sorry for the inconvenience.

Statistics: Posted by skataMartin — 05 Mar 2014, 18:00

]]> 2014-03-05T17:41:36+02:00 2014-03-05T17:41:36+02:00 http://theeyetribe.com/forum/viewtopic.php?t=128&p=509#p509 <![CDATA[Re: polling data issue (with source code)]]> Statistics: Posted by skataMartin — 05 Mar 2014, 17:41

]]> 2014-03-05T07:20:42+02:00 2014-03-05T07:20:42+02:00 http://theeyetribe.com/forum/viewtopic.php?t=128&p=504#p504 <![CDATA[polling data issue (with source code)]]>
I'm trying to manually poll data by calling gtl::GazeApi's get_frame() method. The code below shows details. The output on the console shows that the eye tracker was successfully connect. However, the retrieved data is garbage. What did I miss?

Code:
// GazeDataCollector.h
#pragma once
#include "../include/gazeapi_interfaces.h"
#include "../include/gazeapi.h"

class GazeDataCollector : public gtl::IGazeListener
{
public:
   GazeDataCollector(void);
   ~GazeDataCollector(void);

   bool Connect();
   void Disconnect();
   bool GetFrame();

private:
   void on_gaze_data(gtl::GazeData const &gaze_data);

   gtl::GazeApi m_gApi;
   bool connected;
   gtl::GazeData data_;
};


Code:
//GazeDataCollector.cpp
#include "GazeDataCollector.h"
#include <iostream>

GazeDataCollector::GazeDataCollector(void) : connected(false)
{
   std::cout << "constructor" << std::endl;
}


GazeDataCollector::~GazeDataCollector(void)
{
   if(connected)
      Disconnect();
   std::cout << "destructor" << std::endl;
}

bool GazeDataCollector::Connect()
{
   if(m_gApi.connect() )
   {
      m_gApi.add_listener(*this);
      m_gApi.set_push(false);
      connected = true;
      return true;
   }
   return false;
}

bool GazeDataCollector::GetFrame()
{
   m_gApi.get_frame(data_);
   if(data_.state & gtl::GazeData::GD_STATE_TRACKING_GAZE)
   {
      gtl::Point2D const & smoothedCoordinates = data_.avg;
      std::cout << "data received. " << smoothedCoordinates.x << ", " << smoothedCoordinates.y << std::endl;
   }

   return false;
}

void GazeDataCollector::Disconnect()
{
   m_gApi.remove_listener(*this);
   m_gApi.disconnect();
}

void GazeDataCollector::on_gaze_data(gtl::GazeData const &gaze_data)
{
   if( gaze_data.state & gtl::GazeData::GD_STATE_TRACKING_GAZE )
    {
        gtl::Point2D const & smoothedCoordinates = gaze_data.avg;

        // Move GUI point, do hit-testing, log coordinates, etc.
      std::cout << "data received. " << smoothedCoordinates.x << ", " << smoothedCoordinates.y << std::endl;
    }
}


Code:
#include "GazeDataCollector.h"
#include <iostream>
#include "stdlib.h"

int main()
{
   GazeDataCollector gaze;

   if(gaze.Connect())
   {
      std::cout << "Connected." << std::endl;
      std::cout << "start loop" << std::endl;
      for(int i=0; i<50; i++)
      {
         gaze.GetFrame();
         _sleep(30);   // pause for 30 ms
      }
      std::cout << "end loop" << std::endl;
   }

   return 0;
}

Statistics: Posted by skatawxz — 05 Mar 2014, 07:20

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