public void EndFlight()
{
inUse = false;
bCancel = true;
speed = 0;
globeDisplay.IsNavigating = false;
// reposition target
PointZ currentObs = new PointZ();
IPoint newTarget = new PointClass();
currentObs.x = camera.Observer.X;
currentObs.y = camera.Observer.Y;
currentObs.z = camera.Observer.Z;
int orX = 0;
int orY = 0;
int width = 0;
int height = 0;
camera.GetViewport(ref orX, ref orY, ref width, ref height);
object obj1;
object obj2;
try
{
globeDisplay.Locate(globeDisplay.ActiveViewer, width / 2, height / 2, true, true, out newTarget, out obj1, out obj2);
}
catch (System.Exception e)
{
MessageBox.Show(e.Message);
MessageBox.Show(e.StackTrace.ToString());
}
if (newTarget == null) // no intersection with globe, but don't let the target to be too far
{
newTarget = camera.Target;
PointZ tar = new PointZ(currentObs.x, currentObs.y, currentObs.z);
double elevObs = tar.Norm() - 1.0;
if (elevObs <= 0.0001)
{
elevObs = 0.0001;
}
PointZ oldTarget = new PointZ(newTarget.X, newTarget.Y, newTarget.Z);
PointZ dir = (oldTarget - tar);
double val = dir.Norm();
if (val > 0.0)
{
dir.x = dir.x * elevObs * 10 / val;
dir.y = dir.y * elevObs * 10 / val;
dir.z = dir.z * elevObs * 10 / val;
}
tar = tar + dir;
newTarget.X = tar.x;
newTarget.Y = tar.y;
newTarget.Z = tar.z;
}
ESRI.ArcGIS.GlobeCore.IGlobeViewUtil globeViewUtil = globeCamera as ESRI.ArcGIS.GlobeCore.IGlobeViewUtil;
double obsLat;
double obsLon;
double obsAlt;
double tarLat;
double tarLon;
double tarAlt;
globeViewUtil.GeocentricToGeographic(currentObs.x, currentObs.y, currentObs.z, out obsLon, out obsLat, out obsAlt);
globeViewUtil.GeocentricToGeographic(newTarget.X, newTarget.Y, newTarget.Z, out tarLon, out tarLat, out tarAlt);
globeCamera.SetObserverLatLonAlt(obsLat, obsLon, obsAlt / 1000);
globeCamera.SetTargetLatLonAlt(tarLat, tarLon, tarAlt / 1000);
camera.RollAngle = 0;
camera.PropertiesChanged();
globeDisplay.RefreshViewers();
//Windows API call to set cursor
SetCursor(moveFlyCur.Handle.ToInt32());
}
public void Flight()
{
//speed in scene units
double motionUnit = (0.000001 + Math.Abs(observer.Norm() - 1.0) / 200.0) * motion;
//Get IMessageDispatcher interface
IMessageDispatcher pMessageDispatcher;
pMessageDispatcher = new MessageDispatcherClass();
//Set the ESC key to be seen as a cancel action
pMessageDispatcher.CancelOnClick = false;
pMessageDispatcher.CancelOnEscPress = true;
bCancel = false;
do
{
//Get the elapsed time
long currentClock = theClock.TickCount;
double lastFrameDuration = (double)(currentClock - lastClock) / 1000;
lastClock = currentClock;
if (lastFrameDuration < 0.01)
{
lastFrameDuration = 0.01;
}
if (lastFrameDuration > 1)
{
lastFrameDuration = 0.1;
}
System.Diagnostics.Debug.Print(lastFrameDuration.ToString());
//Windows API call to get windows client coordinates
Rectangle rect = new Rectangle();
if (GetClientRect(globeDisplay.ActiveViewer.hWnd, ref rect) == 0)
{
return;
}
//Get normal vectors
double dXMouseNormal, dYMouseNormal;
dXMouseNormal = 2 * ((double)mouseX / (double)(rect.Right - rect.Left)) - 1;
dYMouseNormal = 2 * ((double)mouseY / (double)(rect.Bottom - rect.Top)) - 1;
PointZ dir = this.RotateNormal(lastFrameDuration, dXMouseNormal, dYMouseNormal);
PointZ visTarget = new PointZ(observer.x + distance * dir.x, observer.y + distance * dir.y, observer.z + distance * dir.z);
target.x = visTarget.x;
target.y = visTarget.y;
target.z = visTarget.z;
if (speed != 0)
{
int speedFactor = (speed > 0) ? (1 << speed) : -(1 << (-speed));
//Move the camera in the viewing directions
observer.x = observer.x + (lastFrameDuration * (2 ^ speedFactor) * motionUnit * dir.x);
observer.y = observer.y + (lastFrameDuration * (2 ^ speedFactor) * motionUnit * dir.y);
observer.z = observer.z + (lastFrameDuration * (2 ^ speedFactor) * motionUnit * dir.z);
target.x = target.x + (lastFrameDuration * (2 ^ speedFactor) * motionUnit * dir.x);
target.y = target.y + (lastFrameDuration * (2 ^ speedFactor) * motionUnit * dir.y);
target.z = target.z + (lastFrameDuration * (2 ^ speedFactor) * motionUnit * dir.z);
}
ESRI.ArcGIS.GlobeCore.IGlobeViewUtil globeViewUtil = globeCamera as ESRI.ArcGIS.GlobeCore.IGlobeViewUtil;
double obsLat;
double obsLon;
double obsAlt;
double tarLat;
double tarLon;
double tarAlt;
globeViewUtil.GeocentricToGeographic(observer.x, observer.y, observer.z, out obsLon, out obsLat, out obsAlt);
globeViewUtil.GeocentricToGeographic(target.x, target.y, target.z, out tarLon, out tarLat, out tarAlt);
globeCamera.SetObserverLatLonAlt(obsLat, obsLon, obsAlt / 1000);
globeCamera.SetTargetLatLonAlt(tarLat, tarLon, tarAlt / 1000);
globeCamera.SetAccurateViewDirection(target.x - observer.x, target.y - observer.y, target.z - observer.z);
double rollAngle = 0;
if (speed > 0)
{
rollAngle = 10 * dXMouseNormal * Math.Abs(dXMouseNormal);
}
camera.RollAngle = rollAngle;
//Redraw the scene viewer
globeDisplay.RefreshViewers();
//Dispatch any waiting messages: OnMouseMove / OnMouseUp / OnKeyUp events
object objCancel = bCancel as object;
pMessageDispatcher.Dispatch(globeDisplay.ActiveViewer.hWnd, false, out objCancel);
//End flight if ESC key pressed
if (bCancel == true)
{
EndFlight();
}
}while (inUse == true && bCancel == false);
bCancel = false;
}