public void MarkerAnimation(double latitude, double longitude, Action callback)
{
//gán lại vòng quay
double mMoveIndex = 0;
double MAX_MOVE_STEP = 40;
var startPosition = this.Position;
var finalPosition = new Position(latitude, longitude);
double elapsed = 0;
double t;
double v;
Device.StartTimer(TimeSpan.FromMilliseconds(100), () =>
{
// Calculate progress using interpolator
elapsed = elapsed + 100;
t = elapsed / 4000;
v = GeoHelper.GetInterpolation(t);
var postionnew = GeoHelper.Interpolate(v,
new Position(startPosition.Latitude, startPosition.Longitude),
new Position(latitude, longitude));
mMoveIndex = mMoveIndex + 1;
this.Position = new Position(postionnew.Latitude, postionnew.Longitude);
if (mMoveIndex > MAX_MOVE_STEP)
{
callback();
return(false);
}
return(true);
});
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
string result = string.Empty;
if ((value is double))
{
result = GeoHelper.LatitudeToDergeeMinSec((double)value);
}
return(result);
}
public void Rotate(double latitude,
double longitude,
Action callback)
{
//gán lại vòng quay
var mRotateIndex = 0;
// * tính góc quay giữa 2 điểm location
var angle = GeoHelper.ComputeHeading(this.Position.Latitude, this.Position.Longitude, latitude, longitude);
if (angle == 0)
{
callback();
return;
}
//tính lại độ lệch góc
var deltaAngle = GeoHelper.GetRotaion(this.Rotation, angle);
var startRotaion = this.Rotation;
Device.StartTimer(TimeSpan.FromMilliseconds(50), () =>
{
//góc quay tiếp theo
var fractionAngle = GeoHelper.ComputeRotation(
mRotateIndex / 10,
startRotaion,
deltaAngle);
mRotateIndex = mRotateIndex + 1;
this.Rotation = (float)fractionAngle;
if (mRotateIndex > 10)
{
callback();
return(false);
}
return(true);
});
}
