private IEnumerable <GameObject> FindObjectsInGaze(Vector2 gazePoint,
Camera camera)
{
var objectsInGaze = new List <GameObject>();
var fovealAngle = 2.0f;
var distanceGazeOriginToScreen_inches = 24f; // ~ 60 cm
var dpi = Screen.dpi > 0 ? Screen.dpi : 100;
var fovealRadius_inches = Mathf.Tan(fovealAngle * Mathf.Deg2Rad) *
distanceGazeOriginToScreen_inches;
var fovealRadius_pixels =
Mathf.RoundToInt(fovealRadius_inches * dpi);
var points =
PatternGenerator.CreateCircularAreaUniformPattern(gazePoint,
fovealRadius_pixels, 4);
IEnumerable <RaycastHit> hitInfos;
if (HitTestFromPoint.FindMultipleObjectsInWorldFromMultiplePoints(
out hitInfos, points, camera,
MaximumDistance, LayerMask))
{
foreach (var raycastHit in hitInfos)
{
objectsInGaze.Add(raycastHit.collider.gameObject);
}
}
return(objectsInGaze);
}
private IEnumerable <GameObject> FindObjectsInGaze(
IEnumerable <global::Tobii.Framework.GazePoint> gazePoints, Camera camera)
{
var points = new List <Vector2>();
/*Note: Do not use LINQ here - too inefficient to be called every update.*/
foreach (var gazePoint in gazePoints)
{
if (gazePoint.IsValid)
{
points.Add(gazePoint.Screen);
}
}
var objectsInGaze = new List <GameObject>();
IEnumerable <RaycastHit> hitInfos;
if (HitTestFromPoint.FindMultipleObjectsInWorldFromMultiplePoints(
out hitInfos, points, camera,
MaximumDistance, LayerMask))
{
foreach (var raycastHit in hitInfos)
{
objectsInGaze.Add(raycastHit.collider.gameObject);
}
}
return(objectsInGaze);
}
public FocusedObject GetFocusedObject(
IEnumerable <global::Tobii.Framework.GazePoint> lastGazePoints, Camera camera)
{
var gazePoint = lastGazePoints.Last();
if (!gazePoint.IsValid)
{
return(FocusedObject.Invalid);
}
GameObject focusedObject = null;
RaycastHit hitInfo;
if (HitTestFromPoint.FindObjectInWorld(out hitInfo,
gazePoint.Screen, camera, MaximumDistance, LayerMask))
{
if (GazeFocus.IsFocusableObject(hitInfo.collider.gameObject))
{
focusedObject = hitInfo.collider.gameObject;
}
}
return(new FocusedObject(focusedObject));
}
