public double distance(KmlCoordinate p0, KmlCoordinate p1, KmlCoordinate p2)
{
double u, result = 0.0;
if (p1.Latitude == p2.Latitude
&& p1.Longitude == p2.Longitude) {
result = Math.Sqrt(Math.Pow(p2.Latitude - p0.Latitude, 2)
+ Math.Pow(p2.Longitude - p0.Longitude, 2));
} else {
u = ((p0.Latitude - p1.Latitude)
* (p2.Latitude - p1.Latitude) + (p0
.Longitude - p1.Longitude)
* (p2.Longitude - p1.Longitude))
/ (Math.Pow(p2.Latitude - p1.Latitude, 2) + Math
.Pow(p2.Longitude - p1.Longitude, 2));
if (u <= 0) {
result = Math.Sqrt(Math.Pow(p0.Latitude - p1.Latitude,
2)
+ Math.Pow(p0.Longitude - p1.Longitude, 2));
} else if (u >= 1) {
result = Math.Sqrt(Math.Pow(p0.Latitude - p2.Latitude,
2)
+ Math.Pow(p0.Longitude - p2.Longitude, 2));
} else if (0 < u && u < 1) {
result = Math.Sqrt(Math.Pow(p0.Latitude - p1.Latitude
- u * (p2.Latitude - p1.Latitude), 2)
+ Math.Pow(p0.Longitude - p1.Longitude - u
* (p2.Longitude - p1.Longitude), 2));
}
}
return result;
}
void node_NodeActivated(LayerUITreeNode node)
{
if (node != null && node.Tag is KmlFeature)
{
KmlFeature feature = (KmlFeature)node.Tag;
if (feature.LookAt != null)
{
if (feature.sky)
{
Earth3d.MainWindow.GotoTarget(new TourPlace(feature.Name, feature.LookAt.latitude, (feature.LookAt.longitude + 180) / 15, Classification.Unidentified, "", ImageSetType.Sky, .8), false, false, true);
}
else
{
GotoLookAt(feature);
}
}
else if (node.Tag is KmlPlacemark)
{
KmlPlacemark placemark = (KmlPlacemark)node.Tag;
if (placemark.geometry != null)
{
KmlCoordinate point = placemark.geometry.GetCenterPoint();
if (placemark.sky)
{
Earth3d.MainWindow.GotoTarget(new TourPlace(placemark.Name, point.Lat, (point.Lng + 180) / 15, Classification.Unidentified, "", ImageSetType.Sky, .8), false, false, true);
}
else
{
Earth3d.MainWindow.GotoTarget(new TourPlace(placemark.Name, point.Lat, point.Lng, Classification.Unidentified, "", ImageSetType.Earth, .8), false, false, true);
}
}
//if (placemark.geometry is KmlPoint)
//{
// KmlPoint point = (KmlPoint)placemark.geometry;
// if (placemark.sky)
// {
// Earth3d.MainWindow.GotoTarget(new TourPlace(placemark.Name, point.latitude, (point.longitude + 180) / 15, Classification.Unidentified, "", ImageSetType.Sky, .8), false, false, true);
// }
// else
// {
// Earth3d.MainWindow.GotoTarget(new TourPlace(placemark.Name, point.latitude, point.longitude, Classification.Unidentified, "", ImageSetType.Earth, .8), false, false, true);
// }
//}
}
}
}
