/// <summary>
/// Begin with the selection and movement of the focused target.
/// </summary>
public void DragAndDrop_Start()
{
if ((EyeTrackingProvider?.GazeTarget == gameObject) && (!objIsGrabbed))
{
if (AudioFeedbackPlayer.Instance != null)
{
AudioFeedbackPlayer.Instance.PlaySound(audio_OnDragStart);
}
objIsGrabbed = true;
EyeTrackingDemoUtils.GameObject_ChangeTransparency(gameObject, transparency_inTransition, ref originalTransparency);
initialHandPos = handPos_absolute;
initalGazeDir = new Vector3(EyeTrackingProvider.GazeDirection.x, EyeTrackingProvider.GazeDirection.y, EyeTrackingProvider.GazeDirection.z);
Rigidbody rbody = GetComponent <Rigidbody>();
if (rbody != null)
{
originalUseGravity = rbody.useGravity;
originalDrag = rbody.drag;
rbody.useGravity = false;
rbody.drag = float.PositiveInfinity;
}
OnDragStart.Invoke();
}
}
/// <summary>
/// Determine whether the user is looking away from the preview.
/// </summary>
/// <returns></returns>
private bool IsLookingAwayFromPreview()
{
if (prevPreviewPos == null || EyeTrackingProvider == null)
{
return(true);
}
Vector3 eyes2PrevPreview = prevPreviewPos.Value - EyeTrackingProvider.GazeOrigin;
Vector3 eye2HitPos = EyeTrackingProvider.GazeDirection;
float angle = Vector3.Angle(eyes2PrevPreview, eye2HitPos);
float distance = EyeTrackingDemoUtils.VisAngleInDegreesToMeters(Vector3.Angle(eyes2PrevPreview, eye2HitPos), eye2HitPos.magnitude);
if (distance < previewPlacemDistThresh)
{
return(false);
}
// Check if the target is still hit by the eye gaze cursor
if (EyeTrackingProvider.GazeTarget == previewGameObject)
{
return(false);
}
// Check whether the user is still looking within the proximity of the target
float distanceBetweenTargetAndCurrHitPos = Angle_ToCurrHitTarget(previewGameObject);
if (distanceBetweenTargetAndCurrHitPos > minLookAwayDistToEnableEyeWarp)
{
return(true);
}
return(false);
}
/// <summary>
/// Instantiates a new target and transforms it according to the given parameters.
/// </summary>
/// <param name="radius">Radius of the ring in which the target is placed in.</param>
/// <param name="viewingDist">The distance between the target group and the camera.</param>
/// <param name="iTarget">The index of the target within the current ring.</param>
private void InstantiateRadialLayoutedTarget(float radius, float viewingDist, int iTarget)
{
GameObject _target = Instantiate(GetRandomTemplate());
// Position
float xnew = transform.position.x + EyeTrackingDemoUtils.VisAngleInDegreesToMeters(radius, viewingDist) * Mathf.Cos(Mathf.Deg2Rad * iTarget * 360 / radialLayout_nTargets);
float ynew = transform.position.y + EyeTrackingDemoUtils.VisAngleInDegreesToMeters(radius, viewingDist) * Mathf.Sin(Mathf.Deg2Rad * iTarget * 360 / radialLayout_nTargets);
_target.transform.localPosition = new Vector3(xnew, ynew, transform.position.z);
// Scale
float dist2 = Vector3.Distance(CameraCache.Main.transform.position, _target.transform.position);
Vector3 tmpTargetSizeInMeters = EyeTrackingDemoUtils.VisAngleInDegreesToMeters(targetSizeInVisAngle, dist2);
_target.transform.localScale = tmpTargetSizeInMeters;
// Name it
_target.name = string.Format("target_r{0}_t{1}", radius, iTarget);
// Assign parent
_target.transform.SetParent(transform);
_target.gameObject.SetActive(true);
// Add it to our list of instantiated targets
instantiatedTargets.Add(_target);
}
/// <summary>
/// If a new target entered the trigger zone and one of our desired targets recently has been dropped,
/// the AreWeThereYet method is called to check if all desired targets are in the destination zone.
/// </summary>
private void AreWeThereYet()
{
bool areAllObjsInZone = true;
// Check that each requested target is within the trigger zone.
// Note, this does not check whether additional items have been placed in our trigger zone.
for (int i = 0; i < ObjsToPlaceHere.Length; i++)
{
if ((ObjsToPlaceHere[i] != null) && (!currCollidingObjs.Contains(ObjsToPlaceHere[i].name)))
{
areAllObjsInZone = false;
break;
}
}
// Only change color if the status has changed
if (areAllObjsInZone && !prevAllObjsInZone)
{
EyeTrackingDemoUtils.GameObject_ChangeColor(gameObject, statusColor_achieved, ref originalColor, false);
AudioFeedbackPlayer.Instance.PlaySound(AudioFx_Success);
}
else if (!areAllObjsInZone && prevAllObjsInZone)
{
EyeTrackingDemoUtils.GameObject_ChangeColor(gameObject, statusColor_idle, ref originalColor, false);
}
prevAllObjsInZone = areAllObjsInZone;
}
private void Start()
{
// Init our list of currently colliding game objects
currCollidingObjs = new List <string>();
// Set default color
EyeTrackingDemoUtils.GameObject_ChangeColor(gameObject, statusColor_idle, ref originalColor, false);
}
/// <summary>
/// Turn on the preview of the to-be-placed target.
/// </summary>
private void ActivatePreview()
{
if (previewGameObject == null)
{
previewGameObject = Instantiate(gameObject);
previewGameObject.GetComponent <Collider>().enabled = false;
EyeTrackingDemoUtils.GameObject_ChangeTransparency(previewGameObject, transparency_preview);
placePreviewAtHitPoint = false;
}
previewGameObject.SetActive(true);
}
/// <summary>
/// Keeps the target size in visual angle constant.
/// </summary>
private void KeepConstantVisAngleTargetSize()
{
// Note: We could improve performance by checking the delta camera movement. If below thresh -> Don't update.
foreach (GameObject gobj in instantiatedTargets)
{
if (gobj != null)
{
float distObjToCam = Vector3.Distance(CameraCache.Main.transform.position, gobj.transform.position);
gobj.transform.localScale = EyeTrackingDemoUtils.VisAngleInDegreesToMeters(targetSizeInVisAngle, distObjToCam);
}
}
}
/// <summary>
/// Reset the target group iterator.
/// </summary>
public void ResetIterator()
{
currTargetIndex = 0;
ResetAmountOfTries();
targets = GetComponent <TargetGroupCreatorRadial>().InstantiatedObjects;
// Randomize the order in which targets are highlighted
if (Randomize)
{
targets = EyeTrackingDemoUtils.RandomizeListOrder(targets);
}
// Show first highlighted target
// Hide all targets first
foreach (GameObject obj in targets)
{
obj.SetActive(!DeactiveDistractors);
}
// Then activate current target and highlight
ShowHighlights();
}
/// <summary>
/// Creates a group of instantiated targets in a radial layout.
/// </summary>
private void CreateNewTargets_RadialLayout()
{
instantiatedTargets = new List <GameObject>();
// Set target size
float dist = Vector3.Distance(CameraCache.Main.transform.position, transform.position);
targetSizeInMeters = EyeTrackingDemoUtils.VisAngleInDegreesToMeters(targetSizeInVisAngle, dist);
// Let's store the local rotation and reset it for now to rotate it later with all children
Vector3 rotate = transform.localRotation.eulerAngles;
transform.localRotation = Quaternion.Euler(Vector3.zero);
// Let's make sure we have some templates to work with
if ((templates != null) && (templates.Length > 0))
{
// Show a target at the center of the target group
if (showTargetAtGroupCenter)
{
InstantiateRadialLayoutedTarget(0, dist, 0);
}
// Instantiate and place the remaining targets
// Create different number of rings based on the amount of given radii
for (int ir = 0; ir < radialLayout_radiusInVisAngle.Length; ir++)
{
// Per ring create a given number of targets
for (int it = 0; it < radialLayout_nTargets; it++)
{
InstantiateRadialLayoutedTarget(radialLayout_radiusInVisAngle[ir], dist, it);
}
}
// Rotate the target family
transform.Rotate(rotate);
}
}
/// <summary>
/// Finalize placing the currently selected target.
/// </summary>
public void DragAndDrop_Finish()
{
if (objIsGrabbed)
{
if (AudioFeedbackPlayer.Instance != null)
{
AudioFeedbackPlayer.Instance.PlaySound(audio_OnDragStop);
}
if (onlyEyeWarpOnRelease)
{
manualTargetManip = true;
if (plausibleLocation.HasValue)
{
MoveTargetTo(plausibleLocation.Value);
}
}
objIsGrabbed = false;
DeactivatePreview();
EyeTrackingDemoUtils.GameObject_ChangeTransparency(gameObject, originalTransparency);
Rigidbody rbody = GetComponent <Rigidbody>();
if (rbody != null)
{
rbody.useGravity = originalUseGravity;
rbody.drag = originalDrag;
}
if (useAsSlider)
{
OnDrop_SnapToClosestDecimal();
}
OnDrop.Invoke();
}
}
/// <summary>
/// Proceed to the next target. If the end is reached, fire an event that the target group has been fully
/// iterated and restart the scene.
/// </summary>
private void ProceedToNextTarget()
{
Debug.Log("[TargetGroupIterator] >> Next target: " + currTargetIndex + " / " + nrOfTargetsToSelect);
ResetAmountOfTries();
Fire_OnTargetSelected();
if (currTargetIndex < nrOfTargetsToSelect - 1)
{
// 1. Let's reset the highlight for the last target.
HideHighlights();
// 2. If "DisableDistractors" is true then let's hide the selected target
if (DeactiveDistractors)
{
CurrentTarget.gameObject.SetActive(false);
}
// 3. Let's update to highlight the new target.
currTargetIndex++;
ShowHighlights();
}
else // At the end
{
// Fire an event to inform listeners that all targets have been iterated through.
Fire_OnAllTargetsSelected();
// Play some audio feedback (e.g., a cheerful applause).
AudioFeedbackPlayer.Instance.PlaySound(AudioApplauseOnFinish);
// If a scene is given, reload the scene after a short timeout.
if (SceneToLoadOnFinish != "")
{
StartCoroutine(EyeTrackingDemoUtils.LoadNewScene(SceneToLoadOnFinish, 0.1f));
}
}
}