This is example 14. This example demonstrates the following:
-
Processing validation results on validation procedure completion
This example is based on example 6. It
extends the onModeChange() event handler function to print validation results.
Source code
Source file: example14.c
onModeChange()
In the onModeChange() event handler function we dump validation results on
completion of the validation procedure.
static int onModeChange(EyeVec* eyevec, int64_t eventtime,
const EyeVecModeChangeEventData* modedata, void* cldata)
{
(void)eyevec;
ClientData* clientdata = (ClientData*)cldata;
if (clientdata == NULL) return 0;
clientdata->trackermode = modedata->newmode;
if (clientdata->showmodechanges) {
printf("onModeChange:\n");
printf(" eventtime: %" PRId64 "\n",
eventtime);
printf(" oldmode: %s\n",
eyevec_tracker_mode_string(modedata->oldmode));
printf(" newmode: %s\n",
eyevec_tracker_mode_string(modedata->newmode));
printf(" exitstatus: %s\n",
eyevec_exit_status_string(modedata->exitstatus));
// printf(" deviceerror: %d\n",
// modedata->deviceerror);
}
EyeVecResult err;
int status;
switch (modedata->oldmode) { (1)
case EYEVEC_TRACKER_MODE_OFF:
case EYEVEC_TRACKER_MODE_IDLE:
case EYEVEC_TRACKER_MODE_SETUP:
case EYEVEC_TRACKER_MODE_SETUP_TEST:
case EYEVEC_TRACKER_MODE_SETUP_EVALUATION:
case EYEVEC_TRACKER_MODE_SETUP_BASELINE:
case EYEVEC_TRACKER_MODE_SETUP_CALIBRATION:
break;
case EYEVEC_TRACKER_MODE_SETUP_VALIDATION: (1)
if (clientdata->showprocresults < 1) break;
if (modedata->exitstatus != EYEVEC_EXIT_STATUS_OK) break; (2)
err = eyevec_get_validation_status(eyevec, &status); (3)
if (err)
printError("eyevec_get_validation_status()", err);
else {
printf("eyevec_get_validation_status() -> %d\n", status);
if (status <= 0) break; // No validation performed.
EyeVecValidationResult result;
err = eyevec_get_validation_result(eyevec, &result); (4)
if (err) {
printError("eyevec_get_validation_result()", err);
}
else {
printf("eyevec_get_validation_result() ->\n");
if (result.havedata) { (5)
printf(" npoints %d\n",
result.npoints);
printf(" npointsskipped %d\n",
result.npointsskipped);
printf(" npointsinvalid %d\n",
result.npointsinvalid);
printf(" npointsbad %d\n",
result.npointsbad);
printf(" npointspoor %d\n",
result.npointspoor);
printf(" npointsfair %d\n",
result.npointsfair);
printf(" npointsgood %d\n",
result.npointsgood);
for (int n = EYEVEC_RIGHT_EYE; n <= EYEVEC_MEAN_EYE;
n++) {
if (result.haveeye[n]) {
printf(" mean_mm[%d] %.3f\n",
n,
(double)result.mean_mm[n]);
printf(" sd_mm[%d] %.3f\n",
n,
(double)result.sd_mm[n]);
printf(" min_mm[%d] %.3f\n",
n,
(double)result.min_mm[n]);
printf(" max_mm[%d] %.3f\n",
n,
(double)result.max_mm[n]);
printf(" mean_deg[%d] %.3f\n",
n,
(double)result.mean_deg[n]);
printf(" sd_deg[%d] %.3f\n",
n,
(double)result.sd_deg[n]);
printf(" min_deg[%d] %.3f\n",
n,
(double)result.min_deg[n]);
printf(" max_deg[%d] %.3f\n",
n,
(double)result.max_deg[n]);
}
}
}
else {
printf(" no data\n");
}
}
if (clientdata->showprocresults < 2) break;
EyeVecValidationPointResult pointresult;
. (6)
.
.
}
break;
case EYEVEC_TRACKER_MODE_SETUP_DRIFT_CHECK:
case EYEVEC_TRACKER_MODE_SETUP_RECORDING:
case EYEVEC_TRACKER_MODE_DATA:
case EYEVEC_TRACKER_MODE_DRIFT_CHECK:
case EYEVEC_TRACKER_MODE_RECORDING:
break;
}
switch (modedata->newmode) {
case EYEVEC_TRACKER_MODE_OFF:
case EYEVEC_TRACKER_MODE_IDLE:
case EYEVEC_TRACKER_MODE_SETUP:
case EYEVEC_TRACKER_MODE_SETUP_TEST:
case EYEVEC_TRACKER_MODE_SETUP_EVALUATION:
case EYEVEC_TRACKER_MODE_SETUP_BASELINE:
case EYEVEC_TRACKER_MODE_SETUP_CALIBRATION:
case EYEVEC_TRACKER_MODE_SETUP_VALIDATION:
case EYEVEC_TRACKER_MODE_SETUP_DRIFT_CHECK:
case EYEVEC_TRACKER_MODE_SETUP_RECORDING:
case EYEVEC_TRACKER_MODE_DATA:
case EYEVEC_TRACKER_MODE_DRIFT_CHECK:
case EYEVEC_TRACKER_MODE_RECORDING:
break;
}
return 0;
}| 1 | Check if the eye-tracker is leaving validation mode, signifying validation procedure completion. |
| 2 | Check exitstatus of the validation procedure. If not OK, there’s nothing
to print. |
| 3 | Check if validation results are available. |
| 4 | Retrieve the validationresults into an EyeVecValidationResult struct. |
| 5 | Check if the result struct contains data and if so proceed with printing
the validation results. |
| 6 | Processing validation point results omitted for brevity. See source file. |
Running
After a succesful build run the program:
-
Press
xto calleyevec_set_show_gui_on_setup_mode(). This sets the show-gui-on-setup-mode flag to make the user-interface show on setup mode enter. -
Press
oto calleyevec_open(). Eye-tracker should go from off mode to idle mode. -
Press
sto calleyevec_enter_setup_mode(). Eye-tracker should go from idle mode to setup mode. Now perform the baseline measurement, calibration and valdation. -
Press
qto quit.
Output might look like this (empty lines added for clarity):
eyevec_create_thread(): OK
eyevec_initialize(): OK
Type q to quit, ? for help.
[x]
eyevec_set_show_gui_on_setup_mode(true): OK
[o]
eyevec_open(): OK
onModeChange:
eventtime: 1750680276307582
oldmode: TRACKER_MODE_OFF
newmode: TRACKER_MODE_IDLE
exitstatus: EXIT_STATUS_NONE
[s]
onModeChange:
eventtime: 1750680278769514
oldmode: TRACKER_MODE_IDLE
newmode: TRACKER_MODE_SETUP
exitstatus: EXIT_STATUS_NONE
eyevec_enter_setup_mode(): OK
onModeChange:
eventtime: 1750680280725775
oldmode: TRACKER_MODE_SETUP
newmode: TRACKER_MODE_SETUP_BASELINE
exitstatus: EXIT_STATUS_NONE
onModeChange:
eventtime: 1750680284821336
oldmode: TRACKER_MODE_SETUP_BASELINE
newmode: TRACKER_MODE_SETUP
exitstatus: EXIT_STATUS_OK
onModeChange:
eventtime: 1750680286947982
oldmode: TRACKER_MODE_SETUP
newmode: TRACKER_MODE_SETUP_CALIBRATION
exitstatus: EXIT_STATUS_NONE
onModeChange:
eventtime: 1750680297527351
oldmode: TRACKER_MODE_SETUP_CALIBRATION
newmode: TRACKER_MODE_SETUP
exitstatus: EXIT_STATUS_OK
onModeChange:
eventtime: 1750680299014467
oldmode: TRACKER_MODE_SETUP
newmode: TRACKER_MODE_SETUP_VALIDATION
exitstatus: EXIT_STATUS_NONE
onModeChange:
eventtime: 1750680309998252
oldmode: TRACKER_MODE_SETUP_VALIDATION
newmode: TRACKER_MODE_SETUP
exitstatus: EXIT_STATUS_OK
eyevec_get_validation_status() -> 1
eyevec_get_validation_result() ->
npoints 5
npointsskipped 0
npointsinvalid 0
npointsbad 0
npointspoor 0
npointsfair 2
npointsgood 3
mean_mm[0] 4.440
sd_mm[0] 2.264
min_mm[0] 0.487
max_mm[0] 5.770
mean_deg[0] 0.305
sd_deg[0] 0.156
min_deg[0] 0.033
max_deg[0] 0.415
mean_mm[1] 6.748
sd_mm[1] 1.671
min_mm[1] 4.131
max_mm[1] 8.577
mean_deg[1] 0.464
sd_deg[1] 0.125
min_deg[1] 0.290
max_deg[1] 0.623
mean_mm[2] 5.471
sd_mm[2] 1.026
min_mm[2] 4.054
max_mm[2] 6.570
mean_deg[2] 0.376
sd_deg[2] 0.080
min_deg[2] 0.272
max_deg[2] 0.477
[q]
eyevec_cleanup(): OK
eyevec_destroy_thread(): OKThe results printed are the same as shown in the user-interface.
Repeating the above with showprocresults in the client data struct raised to
2 will output additional results for each validation target.