private ARHitResult HitTest4Result(ARFrame frame, ARCamera camera, MotionEvent mEvent)
{
ARHitResult hitResult = null;
IList <ARHitResult> hitTestResults = frame.HitTest(mEvent);
for (int i = 0; i < hitTestResults.Count; i++)
{
// Determine whether the hit point is within the plane polygon.
ARHitResult hitResultTemp = hitTestResults.ElementAt(i);
if (hitResultTemp == null)
{
continue;
}
IARTrackable trackable = hitResultTemp.Trackable;
Java.Lang.Object PointOrPlane = null;
bool isPlanHitJudge = false;
bool isPointHitJudge = false;
try
{
PointOrPlane = trackable.JavaCast <ARPlane>();
isPlanHitJudge =
PointOrPlane.GetType() == typeof(ARPlane) && ((ARPlane)PointOrPlane).IsPoseInPolygon(hitResultTemp.HitPose) &&
(CalculateDistanceToPlane(hitResultTemp.HitPose, camera.Pose) > 0);
}
catch (Exception e)
{
PointOrPlane = trackable.JavaCast <ARPoint>();
isPointHitJudge = PointOrPlane.GetType() == typeof(ARPoint) &&
((ARPoint)PointOrPlane).GetOrientationMode() == ARPoint.OrientationMode.EstimatedSurfaceNormal;
};
// Determine whether the point cloud is clicked and whether the point faces the camera.
// Select points on the plane preferentially.
if (isPlanHitJudge)
{
hitResult = hitResultTemp;
}
}
return(hitResult);
}
private void DoWhenEventTypeSingleTap(ARHitResult hitResult)
{
// The hit results are sorted by distance. Only the nearest hit point is valid.
// Set the number of stored objects to 10 to avoid the overload of rendering and AR Engine.
if (mVirtualObjects.Count >= 16)
{
mVirtualObjects.ElementAt(0).GetAnchor().Detach();
mVirtualObjects.RemoveAt(0);
}
IARTrackable currentTrackable = hitResult.Trackable;
Java.Lang.Object PointOrPlane = null;
bool isPlanHitJudge = false;
bool isPointHitJudge = false;
try
{
PointOrPlane = currentTrackable.JavaCast <ARPlane>();
isPlanHitJudge = PointOrPlane.GetType() == typeof(ARPlane);
}
catch (Exception e)
{
PointOrPlane = currentTrackable.JavaCast <ARPoint>();
isPointHitJudge = PointOrPlane.GetType() == typeof(ARPoint);
};
if (isPointHitJudge)
{
mVirtualObjects.Add(new VirtualObject(hitResult.CreateAnchor(), BLUE_COLORS));
}
else if (isPlanHitJudge)
{
mVirtualObjects.Add(new VirtualObject(hitResult.CreateAnchor(), GREEN_COLORS));
}
else
{
Log.Info(TAG, "Hit result is not plane or point.");
}
}