public void UpdateVirtualObjectPosition(VirtualObject virtualObject, SCNVector3 position, bool filterPosition, NMatrix4 cameraTransform)
{
var cameraWorldPos = cameraTransform.Translation();
var cameraToPosition = position.Subtract(cameraWorldPos);
// Limit the distance of the object from the camera to a maximum of 10m
if (cameraToPosition.LengthFast > 10)
{
cameraToPosition = cameraToPosition.Normalized() * 10;
}
// Compute the average distance of the object from the camera over the last ten
// updates. If filterPosition is true, compute a new position for the object
// with this average. Notice that the distance is applied to the vector from
// the camera to the content, so it only affects the percieved distance of the
// object - the averaging does _not_ make the content "lag".
var hitTestResultDistance = cameraToPosition.LengthFast;
virtualObject.RecentVirtualObjectDistances.Add(hitTestResultDistance);
virtualObject.RecentVirtualObjectDistances.KeepLast(10);
if (filterPosition)
{
var averageDistance = virtualObject.RecentVirtualObjectDistances.Average();
var averagedDistancePos = cameraWorldPos + cameraToPosition.Normalized() * averageDistance;
virtualObject.Position = averagedDistancePos;
}
else
{
virtualObject.Position = cameraWorldPos + cameraToPosition;
}
}
private void SetNewVirtualObjectPosition(VirtualObject virtualObject, SCNVector3 position, NMatrix4 cameraTransform)
{
var cameraWorldPos = cameraTransform.Translation();
var cameraToPosition = position.Subtract(cameraWorldPos);
// Limit the distance of the object from the camera to a maximum of 10m
if (cameraToPosition.LengthFast > 10)
{
cameraToPosition = cameraToPosition.Normalized() * 10;
}
virtualObject.Position = cameraWorldPos + cameraToPosition;
virtualObject.RecentVirtualObjectDistances.Clear();
}