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/// <summary>
/// _gets the rect for all trackable objects.
///
/// NOTE: POSSIBLE OPTIMIZATION --STORE THIS RECT AND ONLY
/// UPDATE UPON CHANGES TO _trackableObjectComponents_list
///
///
/// NOTE: WHEN _trackableObjectComponents_list.Count == 0, THE CAMERA
/// WILL LOOK AT 0,0 BECAUSE OF ' new Rect();' and that is acceptable
///
///
/// </summary>
/// <returns>The rect for all trackable objects.</returns>
private Rect _getRectForAllTrackableObjects(TrackingPriority aMinimumPriority)
{
//
Bounds allTrackableObjects_bounds;
Rect allTrackableObjects_rect = new Rect();
//********************************
//MAKE A FILTERED LIST (ASSUME PRIORITY = NONE BY DEFAULT)
//********************************
List <TrackableObjectComponent> _prioritizedTrackableObjectComponents_list = _trackableObjectComponents_list;
switch (aMinimumPriority)
{
case TrackingPriority.Low:
_prioritizedTrackableObjectComponents_list = (List <TrackableObjectComponent>)_trackableObjectComponents_list.Where(
trackableObjectComponent => trackableObjectComponent.trackingPriority == TrackingPriority.Low || trackableObjectComponent.trackingPriority == TrackingPriority.High).ToList();
break;
case TrackingPriority.High:
_prioritizedTrackableObjectComponents_list = (List <TrackableObjectComponent>)_trackableObjectComponents_list.Where(
trackableObjectComponent => trackableObjectComponent.trackingPriority == aMinimumPriority).ToList();
break;
}
//********************************
//CREATE A BOUNDS THAT ENCAPSULATES ALL OBJECTS OF INTEREST
//********************************
if (_prioritizedTrackableObjectComponents_list.Count > 0)
{
//ENCAPSULATE NEEDS US TO START WITH A NON-'EMPTY' INSTANCE
allTrackableObjects_bounds = _prioritizedTrackableObjectComponents_list[0].getBoundsWithProjection(camera);
//
foreach (TrackableObjectComponent trackableObjectComponent in _prioritizedTrackableObjectComponents_list)
{
allTrackableObjects_bounds.Encapsulate(trackableObjectComponent.getBoundsWithProjection(camera));
}
allTrackableObjects_rect = RectHelper.ConvertBoundsToRect(allTrackableObjects_bounds, _zPlaneCoordinate_float);
}
//
return(RectHelper.Expand(allTrackableObjects_rect, _borderPadding_float));
}