Great that you are sharing and collaborating. I’ll add some helping instructions regarding the API changes.
Here is the code, currently written for EyeX Engine 0.8.3:
https://github.com/gigertron/EyeTracker
To update the MinimalGazeDataStream.cpp to latest EyeX Engine API, here are the steps:
1) Change type of hContext from TX_HANDLE to TX_CONTEXTHANDLE
2) On txInitializeSystem, add a fourth NULL parameter
3) On txReleaseContext, remove the last two parameters
4) Rename txCommitSnapshot to txCommitSnapshotAsync
5) Replace OnSnapshotCommitted with this snippet:
void TX_CALLCONVENTION OnSnapshotCommitted(TX_CONSTHANDLE hAsyncData, TX_USERPARAM param)
{
// check the result code using an assertion.
// this will catch validation errors and runtime errors in debug builds. in release builds it won't do anything.
TX_RESULT result = TX_RESULT_UNKNOWN;
txGetAsyncDataResultCode(hAsyncData, &result);
assert(result == TX_RESULT_OK || result == TX_RESULT_CANCELLED);
}6) Change the first part of HandleEvent (before the if statements) to:
void TX_CALLCONVENTION HandleEvent(TX_CONSTHANDLE hObject, TX_USERPARAM userParam)
{
TX_HANDLE hEvent = TX_EMPTY_HANDLE;
TX_HANDLE hBehavior = TX_EMPTY_HANDLE;
txGetAsyncDataContent(hObject, &hEvent);7) Change the last line of HandleEvent to
txReleaseObject(&hEvent);