/**
* Helper function for calibration setup.
* This will perform the following procedures
*
* 1) Initialize eye tracking calibration
* 2) Ensure Vive Tracker for Headset and Vive Controllers are connected
* 3) Prompt to calibrate FOVE headset to Vive space (Press H)
* 4) Load initial scene (Scene_000) if everything is completed
*/
private void RunCalibrationSetup()
{
if (eyeTrackerCalibrationStarted == false)
{
FoveInterface.EnsureEyeTrackingCalibration();
eyeTrackerCalibrationStarted = true;
}
if (RenderSettings.skybox != defaultSkyboxMaterial)
{
RenderSettings.skybox = defaultSkyboxMaterial;
}
bool eyeTrackerCalibrated = (!FoveInterface.IsEyeTrackingCalibrating() && FoveInterface.IsEyeTrackingCalibrated());
bool headsetCalibrated = headsetLocalizationInstance.IsHeadsetCalibrated();
bool viveTrackerHeadsetConnected = headsetLocalizationInstance.IsHeadsetPositionTracked();
bool controllersConnected = headsetLocalizationInstance.IsControllersConnected();
string uiPromptMessage = "";
if (viveTrackerHeadsetConnected == false)
{
uiPromptMessage += "Please turn on Vive Tracker for headset.\n";
}
if (controllersConnected == false)
{
uiPromptMessage += "Please connect both Vive controllers.\n";
}
if (eyeTrackerCalibrated == false)
{
uiPromptMessage += "Please calibrate eye tracking.\n";
}
if (headsetCalibrated == false)
{
uiPromptMessage += "Please calibrate headset and vive to world space [H]\n";
}
uiPrompt.SetUiPromptMessage(uiPromptMessage);
uiPrompt.TurnOnUiPrompt();
if (eyeTrackerCalibrated && headsetCalibrated)
{
systemCalibrated = true;
uiPrompt.TurnOffUiPrompt();
// Initialize a new scene
headsetLocalizationInstance.ReCenterUser();
eyeTrackerInstance.CreateNewScene(GenerateSceneName(currentSceneNumber));
SceneManager.LoadSceneAsync(GenerateSceneName(currentSceneNumber), LoadSceneMode.Additive);
ChangeSkybox(currentSceneNumber);
currentSceneState = SCENE_CHANGE_STATE.Changing;
}
}
/**
* Initialize the experiment
*
* This function will initiate a setup procedure for the fove vive setup, which includes
* calibrating the FOVE headset to vive space and calibrating FOVE's eye tracking. It
* will also create a logging instance to track which object the user is looking at.
*/
void Start()
{
// Initialize variables
systemCalibrated = false;
eyeTrackerCalibrationStarted = false;
currentSceneNumber = 0;
currentSceneState = SCENE_CHANGE_STATE.NotChanging;
nextAllowedSceneChangeRequestTime = 0;
testSubjectName = "TestSubject";
// Create logging directory
experimentStartTime = DateTime.Now.ToString("yyyy-MM-dd_HH-mm-ss");
logDirectory = Directory.GetParent(Application.dataPath) + "/" + logRootDirectory + "/" + experimentStartTime;
Directory.CreateDirectory(logDirectory);
nextSceneTime = long.MaxValue;
if (skipIntro)
{
systemCalibrated = true;
}
}
// Update is called once per frame
void Update()
{
// Ensure everything is calibrated before starting experiment
if (systemCalibrated == false)
{
RunCalibrationSetup();
return;
}
// Ensure that user has entered in the subject's name
if (usernameInputGameObject.activeInHierarchy)
{
return;
}
// Debug purposes if skipIntro == TRUE. Allow to skip calibration
if (skipIntro && (currentSceneNumber == 0))
{
currentSceneNumber = 1;
uiPrompt.TurnOffUiPrompt();
eyeTrackerInstance.CreateNewScene(GenerateSceneName(currentSceneNumber));
SceneManager.LoadSceneAsync(GenerateSceneName(currentSceneNumber), LoadSceneMode.Additive);
ChangeSkybox(currentSceneNumber);
currentSceneState = SCENE_CHANGE_STATE.NotChanging;
nextSceneTime = DateTime.Now.Ticks + secondsBetweenScene * TimeSpan.TicksPerSecond;
}
// Check if we should begin transition onto the next scene
if (DateTime.Now.Ticks >= nextSceneTime || currentSceneState != SCENE_CHANGE_STATE.NotChanging)
{
switch (currentSceneState)
{
// Initiate change scene if we're not at the last scene
case SCENE_CHANGE_STATE.NotChanging:
if (currentSceneNumber < totalNumberOfScenes)
{
eyeTrackerInstance.SaveToFile(logDirectory);
fadeSceneTime = nextSceneTime;
currentSceneState = SCENE_CHANGE_STATE.FadeOut;
}
break;
// Fade scene out
case SCENE_CHANGE_STATE.FadeOut:
float fadeOutOpacity = 1.0f - ((float)(DateTime.Now.Ticks - fadeSceneTime)) / ((float)(fadeOutDuration * TimeSpan.TicksPerSecond));
fadeOutOpacity = Math.Max(0.0f, fadeOutOpacity);
cameraFadeInstance.setOpacity(fadeOutOpacity);
if (fadeOutOpacity == 0.0f)
{
currentSceneState = SCENE_CHANGE_STATE.InitiateChange;
}
break;
// Tell program to start changing scene
case SCENE_CHANGE_STATE.InitiateChange:
headsetLocalizationInstance.ReCenterUser();
headsetLocalizationInstance.RotatePerson(0.0f);
SceneManager.UnloadSceneAsync(GenerateSceneName(currentSceneNumber));
currentSceneNumber++;
if (currentSceneNumber < totalNumberOfScenes)
{
SceneManager.LoadSceneAsync(GenerateSceneName(currentSceneNumber), LoadSceneMode.Additive);
ChangeSkybox(currentSceneNumber);
currentSceneState = SCENE_CHANGE_STATE.Changing;
}
else
{
ChangeSkybox(-1);
uiPrompt.SetUiPromptMessage("Session has ended.");
uiPrompt.TurnOnUiPrompt();
fadeSceneTime = DateTime.Now.Ticks;
currentSceneState = SCENE_CHANGE_STATE.FadeIn;
}
break;
// Wait for scene to finish loading
case SCENE_CHANGE_STATE.Changing:
if (SceneManager.GetSceneByName(GenerateSceneName(currentSceneNumber)).isLoaded)
{
fadeSceneTime = DateTime.Now.Ticks;
currentSceneState = SCENE_CHANGE_STATE.FadeIn;
}
break;
// Fade back in
case SCENE_CHANGE_STATE.FadeIn:
float fadeInOpacity = ((float)(DateTime.Now.Ticks - fadeSceneTime)) / ((float)(fadeOutDuration * TimeSpan.TicksPerSecond));
fadeInOpacity = Math.Min(1.0f, fadeInOpacity);
cameraFadeInstance.setOpacity(fadeInOpacity);
if (fadeInOpacity == 1.0f)
{
eyeTrackerInstance.CreateNewScene(GenerateSceneName(currentSceneNumber));
currentSceneState = SCENE_CHANGE_STATE.NotChanging;
if (nextSceneTime <= DateTime.Now.Ticks)
{
nextSceneTime = DateTime.Now.Ticks + secondsBetweenScene * TimeSpan.TicksPerSecond;
}
}
break;
}
}
// Allow change to next scene
if (Input.GetKeyDown(KeyCode.N))
{
ChangeToNextScene();
}
}
