The Eye Tribe

C++ • Re: hanging on disconnect

2016-10-12T12:05:56+02:00

Hi Ryklin,

Sorry for the delay, I've created a bug-report the developer of the C++ client to take a look at. Will post back once we've figured out what's going on.

Statistics: Posted by skataMartin — 12 Oct 2016, 12:05

C++ • Re: hanging on disconnect

2016-09-12T18:28:48+02:00

Hi everyone,

I'm following up from my earlier post. Having burned a lot of time on additional testing, I discovered that on my three systems (win7, win8.1 and Win10) the latest SDK - TheEyeTribeSDK-0.9.77-x86.exe does indeed NOT disconnect from the eye tracker properly as indicated below. I do not recommend using this SDK. Instead I reverted to EyeTribeSDK-0.9.56-x86, which works fine.

Also, very important, the latest tet-cpp-client on github dated May 18, 2016 doesn't work at all (no connection to tracker). I recommend you do not waste your time on this. I am using the Dec 10, 2014 revision (notably commented as "Fixed occational exception when disconnected from the GazeAPI..."

I will try to do some more debugging, but this is a huge time drain!!!

BTW I did compile against Boost 1_57 on Win7 with VS2013 and Boost 1_61_0 (the latest) on Win10 with VS2015 Community. I am compiling using the 32 Bit libraries (not 64).

If someone gets a chance, please write back with any supporting information!!!

Statistics: Posted by skataryklin — 12 Sep 2016, 18:28

C++ • hanging on disconnect

2016-09-12T18:36:54+02:00

Today I discovered that the eyetribe sdk version TheEyeTribeSDK-0.9.77-x86.exe is hanging on the function call m_api.disconnect()

I am runing Win10 64 Bit. Connects and streams data fine but hangs on disconnect.

Can anyone else verify?

Next I downloaded the latest tet-cpp-client from github updated on May 18th, recompiled my source and now it won't even connect to the eye tracker. This time it's failing to connect to the socket in the file gazeapi_socket.cpp in the while() on line 63 while( error && endpoint_iterator != end ) the error value returned is 10061, that's all I can make sense out of.

I am going to revert to an earlier sdk version and follow up.

If anyone has any info or can at least verify some/all of this I'd appreciate it!

BTW the server and UI work fine. I haven't tried samples written in other languages, presumably they are fine, and my USB connection is fine too -- I tested with two different eye trackers and 2 different cables on 3 different computers.

Statistics: Posted by skataryklin — 11 Sep 2016, 22:45

C++ • Re: Live Visualization of Gaze Points from Eye Tribe Eye Tra

2016-06-30T05:14:21+02:00

Hi,
Sorry for my delayed response, please send me an email (vijay.drajanna@gmail.com), I will share the code with you.
Thanks.

Statistics: Posted by skatavijayrajanna — 30 Jun 2016, 05:14

C++ • Re: Example not working

2016-06-28T00:47:26+02:00

Hi again,

I have found this in the API documentation:

"A client must send heartbeat packets to the server in order to maintain an active connection, otherwise the server does not answer".

There is no heartbeat at all in the provided example. I have added my own heartbeat but it does not work. The leds in front of the tracker switch off after a couple of seconds, which means it is not sending any data back to the server. I think the missing heartbeat could be the problem.

Any ideas? Please provide any help on this.

Regards,
Leandro

Statistics: Posted by skatalstefanazzi@uns.edu.ar — 28 Jun 2016, 00:47

C++ • Example not working

2016-06-24T13:25:20+02:00

Hi all,

I am new to EyeTribe. I wish to develop a windows app to connect with the EyeTracker. I downloaded the API and Boost, and everything is compiling well under Microsoft Visual Studio 2015. However, it is like the tracker is not working because I ask for coordinates and everything is 0. The callback on_gaze_date is never called.

One more weird thing: if I launch the shipped client before running my own app, I get some coordinates different from 0, however, numbers don't change and remain the same.

Please help me on debugging this.

Thanks in advance,

Leandro

Statistics: Posted by skatalstefanazzi@uns.edu.ar — 24 Jun 2016, 13:25

C++ • Re: Timestamp field missing. What is the meaning of (int) ti

2016-06-14T12:15:14+02:00

The 'time' field is a integer representation of when a frame was sampled in the EyeTribe Server. The 'time' is platform and architecture specific (Windows, macOS, Android) and therefore does not easily translate into a string representation. Therefore there is a dedicated field for the string representation called 'timestamp'. This is explained in the API doc.

The 'time' field increments as time passes and should be used to calculate the delta time between incoming frames.

The 'timestamp' field will be added to the C++ SDK in the next release.

Statistics: Posted by skataAnders — 14 Jun 2016, 12:15

C++ • Re: Live Visualization of Gaze Points from Eye Tribe Eye Tra

2016-06-01T17:18:47+02:00

Hi vijayrajanna!
The project code is not available at the moment. Is it possible to have access to it in another way?

Statistics: Posted by skatafilipafanzeres@hotmail.com — 01 Jun 2016, 17:18

C++ • Re: Timestamp field missing. What is the meaning of (int) ti

2016-06-01T09:48:44+02:00

I have the same question. Can someone help?

Statistics: Posted by skatagvdambros@gmail.com — 01 Jun 2016, 09:48

C++ • Re: Linking errors

2016-04-08T09:05:42+02:00

Cmake creates several build targets besides the user defined ones. The 'all', 'install', and 'zero' are such targets, and are utility targets that neither turn into executables nor libraries on their own.

As the name suggests making the GazeApiLib target yields a library, a static one. Build the install target in debug and release and link against the produced .lib in your own projects.

Statistics: Posted by skataMicky — 08 Apr 2016, 09:05

C++ • Re: Linking errors

2016-04-08T02:40:25+02:00

Micky wrote:
Make sure to follow the C++ 3rdparty build guidelines located at https://github.com/EyeTribe/tet-cpp-client#build

It is worth noting that during step 1) (Install Boost Libraries) you need to download the boost source code and run bootstrap before proceeding to step 2). Running bootstrap will build the boost libraries, which is required before cmake can locate boost.

Thanks for the reply
I realized again and again with different libraries Boost

1. Download the boost libraries and installed the "Developer Command Prompt for VS2013" ls two ways
(First bootstrap -> then \ b2.) Or
(First bootstrap-> then bjam toolset = 12.0 msvc-variant = debug, release threading = multi link = static)
the "stage" folder was created
2. Download the .zip https://github.com/EyeTribe/tet-cpp-client
* I built the project with CMake, indicating the address where the Boost libraries were created.
3. I opened the file built in VS2013 and have 3 solutions:

ALL_BUILD
- External Dependencies
- CMakeKist.txt
GazeApiLib
-external Dependencies (within several files)
-header Files
  gazeapi.h
  gazeapi_interfaces.h
  gazeapi_observable.hpp
  gazeapi_parser.hpp
  gazeapi_socket.hpp
  gazeapi_types.h
-source Files
  gazeapi.cpp
  gazeapi_parser.cpp
  gazeapi_socket.cpp

and within GazeApiLib (Source Files) create a code file name "Source" with:

**********************************************************************************
#include
#include
#include

// --- MyGaze definition
MyGaze class: public GTL :: IGazeListener
{
public:
MyGaze ();
~ MyGaze ();
private:
// IGazeListener
void on_gaze_data (GTL :: GazeData gaze_data const &);
private:
GTL :: GazeApi m_api;
};

// --- MyGaze Implementation
MyGaze :: MyGaze ()
{
// Connect to the server in push mode on the default TCP port (6555)
if (m_api.connect (true))
{
// Enable notifications GazeData
m_api.add_listener (* this);
}
}

MyGaze :: ~ MyGaze ()
{
m_api.remove_listener (* this);
m_api.disconnect ();
}

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

// Move GUI point, do hit-testing, log coordinates, etc.
}
}
********************************************************************************************
The Eye Tribe connect the USB 3.0 port, then build the project without errors. But when running I get the message

"Unable to start program"
'C: \ Users \ MaríaCecilia \ Desktop \ tet-cpp-client-master \ build \ Release \ ALL_BUILD'
The system can not find the file specified.

I do not know how to fix this error. Please help and apologize for any inconvenience caused.
Thank you.

Statistics: Posted by skatamariac.alvarezl@pucp.edu.pe — 08 Apr 2016, 02:40

C++ • Re: Linking errors

2016-04-06T09:53:47+02:00

Make sure to follow the C++ 3rdparty build guidelines located at https://github.com/EyeTribe/tet-cpp-client#build

It is worth noting that during step 1) (Install Boost Libraries) you need to download the boost source code and run bootstrap before proceeding to step 2). Running bootstrap will build the boost libraries, which is required before cmake can locate boost.

Statistics: Posted by skataMicky — 06 Apr 2016, 09:53

C++ • Re: Linking errors

2016-04-05T18:06:17+02:00

Hi Maria,

I've forwarded your message to the developer responsible for the C++ SDK, he will get back to you shortly.

Statistics: Posted by skataMartin — 05 Apr 2016, 18:06

C++ • Re: Linking errors

2016-03-31T09:46:11+02:00

Dears,

I'm developing an interface controlled with The eye tribe, i use Visual Studio 2013 C ++

I realized the following
1. Install Boost libraries(1_56_0)
2. Use CMake GUI to generate project files
3. Build the C++ SDK with Visual Studio 2013

*When i buil the C++ SDK with CMake I see BOOST_DIR Not found, but I get to create the project in Visual Studio 2013

And I add a new item in the solution "GazeApiLib" the name is "Source.cpp" when I compile get the message
"Unable to start program"

I tested with other versions of Boost (1_60_0 / 1_55_0) and I keep getting errors.

Please help me. Thank you

Statistics: Posted by skatamariac.alvarezl@pucp.edu.pe — 31 Mar 2016, 09:46

C++ • Re: calibration_start function problem

2015-12-03T14:09:57+02:00

I finally got around to look into the issue.
There's an internal network deadlock issue that stalls the thread in a send_sync call. The method never terminates because the expected reply message from the server is never received, due to the thread is stalled.
Temporarily, the problem can be fixed using async send to update the internal states that is triggered by server changed notifications.

Statistics: Posted by skataMicky — 03 Dec 2015, 14:09