protected override void OnClick()
{
QueuedTask.Run(() =>
{
var mapView = MapView.Active;
if (mapView == null)
{
return;
}
var polylines = GetRouteLines();
var leftRail = polylines[0];
var rightRail = polylines[1];
double currentTimeSeconds = 0;
MapPoint prevPoint = null;
var cameraTrack = mapView.Map.Animation.Tracks.OfType <CameraTrack>().First();
for (int i = 0; i < leftRail.Points.Count; i++)
{
var leftPoint = leftRail.Points[i];
var rightPoint = rightRail.Points[i];
var currentPoint = GetAveragePoint(leftPoint, rightPoint);
List <Vector3D> vectors = null;
if (i + 1 == leftRail.Points.Count)
{
vectors = GetVectors(currentPoint, prevPoint, leftPoint, rightPoint);
}
else
{
var nextPoint = GetAveragePoint(leftRail.Points[i + 1], rightRail.Points[i + 1]);
vectors = GetVectors(nextPoint, currentPoint, leftPoint, rightPoint);
}
var offsetPoint = MapPointBuilder.CreateMapPoint(currentPoint.X + (_metersAbove * vectors[1].X),
currentPoint.Y + (_metersAbove * vectors[1].Y),
currentPoint.Z + (_metersAbove * vectors[1].Z),
currentPoint.SpatialReference);
var camera = new ArcGIS.Desktop.Mapping.Camera(offsetPoint.X, offsetPoint.Y, offsetPoint.Z, 0.0, 0.0, offsetPoint.SpatialReference, CameraViewpoint.LookFrom);
#region Heading
var radian = Math.Atan2(vectors[0].X, vectors[0].Y);
var heading = radian * -180 / Math.PI;
camera.Heading = heading;
#endregion
#region Pitch
var hypotenuse = Math.Sqrt(Math.Pow(vectors[0].X, 2) + Math.Pow(vectors[0].Y, 2));
radian = Math.Atan2(vectors[0].Z, hypotenuse);
var pitch = (radian * 180 / Math.PI);
camera.Pitch = pitch;
#endregion
#region Roll
var d0 = new Vector3D(vectors[0].X, vectors[0].Y, 0);
var u0 = new Vector3D(0, 0, 1);
var r0 = Vector3D.CrossProduct(u0, d0);
var roll = Vector3D.AngleBetween(r0, vectors[2]);
if (vectors[2].Z < 0)
{
roll *= -1;
}
camera.Roll = roll;
#endregion
#region Speed
if (i > 0)
{
var line = PolylineBuilder.CreatePolyline(new List <MapPoint>()
{
prevPoint, currentPoint
}, currentPoint.SpatialReference);
var length = GeometryEngine.Length3D(line) * currentPoint.SpatialReference.Unit.ConversionFactor;
if (!_hasDropped && !(_hasDropped = (vectors[0].Z < 0)))
{
currentTimeSeconds += length / _currentSpeed;
}
else
{
_currentSpeed = Math.Sqrt(((Math.Pow(_currentSpeed, 2) / 2) + 9.8 * (prevPoint.Z - currentPoint.Z)) * 2);
currentTimeSeconds += length / _currentSpeed;
}
}
#endregion
cameraTrack.CreateKeyframe(camera, TimeSpan.FromSeconds(currentTimeSeconds), AnimationTransition.FixedArc);
prevPoint = currentPoint;
}
});
}