/// <summary>
///
/// </summary>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="lonLat"></param>
/// <returns></returns>
bool ScreenToSpherical(float x, float y, out DVector2 lonLat)
{
var w = viewportWidth;
var h = viewportHeight;
var nearPoint = new DVector3(x, y, frustumZNear);
var farPoint = new DVector3(x, y, frustumZFar);
var vm = DMatrix.LookAtRH(cameraPosition, DVector3.Zero, DVector3.UnitY);
var mVP = vm * projMatrix;
var near = DVector3.Unproject(nearPoint, 0, 0, w, h, frustumZNear, frustumZFar, mVP);
var far = DVector3.Unproject(farPoint, 0, 0, w, h, frustumZNear, frustumZFar, mVP);
lonLat = DVector2.Zero;
DVector3[] res;
if (LineIntersection(near, far, Config.earthRadius, out res))
{
CartesianToSpherical(res[0], out lonLat.X, out lonLat.Y);
return(true);
}
return(false);
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
public void InputDeviceOnMouseDown(object sender, Frame.MouseEventArgs args)
{
if (args.Key != Keys.LeftButton)
{
return;
}
var w = viewportWidth;
var h = viewportHeight;
var pos = new Vector2(args.X, args.Y);
var nearPoint = new DVector3(pos.X, pos.Y, frustumZNear);
var farPoint = new DVector3(pos.X, pos.Y, frustumZFar);
var vm = DMatrix.LookAtRH(cameraPosition, DVector3.Zero, DVector3.UnitY);
var mVP = vm * projMatrix;
var near = DVector3.Unproject(nearPoint, 0, 0, w, h, frustumZNear, frustumZFar, mVP);
var far = DVector3.Unproject(farPoint, 0, 0, w, h, frustumZNear, frustumZFar, mVP);
DVector3[] res;
if (LineIntersection(near, far, Config.earthRadius, out res))
{
if (res.Length > 0)
{
double lon, lat;
CartesianToSpherical(res[0], out lon, out lat);
var lonLat = new DVector2(DMathUtil.RadiansToDegrees(lon), DMathUtil.RadiansToDegrees(lat));
Console.WriteLine(lonLat);
}
}
}