void OnEnable()
{
//Logger.Log("OnEnable " + name);
// Get or add the raycaster
gazeRaycaster = eventSource.GetComponent <GazeRaycaster>();
if (gazeRaycaster == null)
{
gazeRaycaster = eventSource.AddComponent <GazeRaycaster>();
}
// Register our callbacks
gazeRaycaster.onGazeEnter += GazeEnter;
gazeRaycaster.onGazeExit += GazeExit;
}
protected static RaycastHit s_hit; // Only contains valid info when s_gazedObject is not null
// Update is called once per frame
void Update()
{
// TODO: avoid doing raycast if all event subscribers unregistered. Probably rare cases
// Only do it one per frame, the first active instance will do for every others
if (Time.frameCount != s_lastRaycastFrame)
{
s_lastRaycastFrame = Time.frameCount;
// Get the common raycast camera
if (!s_cam)
{
s_cam = FindObjectOfType <Camera>();
Debug.Log("GazeRaycaster will use camera " + s_cam.name, s_cam);
}
s_gazedObjectLast = s_gazedObject;
LayerMask mask = LayerMask.GetMask("Interactible");
bool hitSomething = Physics.Raycast(s_cam.transform.position, s_cam.transform.forward, out s_hit, 50f, mask);
if (hitSomething)
{
s_gazedObject = s_hit.collider.GetComponentInParent <GazeRaycaster>();
// Display actual raycast being projected by the camera
Debug.DrawRay(s_cam.transform.position, s_cam.transform.forward * 50f, Color.red);
}
else
{
s_gazedObject = null;
}
// Send events
if (s_gazedObject != s_gazedObjectLast)
{
if (s_gazedObjectLast)
{
s_gazedObjectLast.onGazeExit();
}
if (s_gazedObject)
{
s_gazedObject.onGazeEnter();
}
}
}
}
