public PointLatLngAlt getMousePos(int x, int y)
{
//https://gamedev.stackexchange.com/questions/103483/opentk-ray-picking
int[] viewport = new int[4];
Matrix4 modelMatrix, projMatrix;
MakeCurrent();
GL.GetFloat(GetPName.ModelviewMatrix, out modelMatrix);
GL.GetFloat(GetPName.ProjectionMatrix, out projMatrix);
GL.GetInteger(GetPName.Viewport, viewport);
var _start = UnProject(new Vector3(x, y, 0.0f), projMatrix, modelMatrix, new Size(viewport[2], viewport[3]));
var _end = UnProject(new Vector3(x, y, 1), projMatrix, modelMatrix, new Size(viewport[2], viewport[3]));
var pos = new utmpos(utmcenter[0] + _end.X, utmcenter[1] + _end.Y, utmzone);
var plla = pos.ToLLA();
plla.Alt = _end.Z;
var point = srtm.getIntersectionWithTerrain(center, plla);
return(point);
}
/// <summary>
/// this is a debug function
/// </summary>
/// <param name="pos"></param>
/// <param name="tag"></param>
static void addtomap(utmpos pos, string tag)
{
if (tag == "M")
{
return;
}
polygons.Markers.Add(new GMapMarkerWP(pos.ToLLA(), tag));
}
/// <summary>
/// this is a debug function
/// </summary>
/// <param name="pos"></param>
/// <param name="tag"></param>
static void addtomap(utmpos pos, string tag)
{
if (tag == "M")
{
return;
}
polygons.Markers.Add(new GMapMarkerWP(pos.ToLLA(), tag));
map.ZoomAndCenterMarkers("polygons");
map.Invalidate();
}
/// <summary>
/// this is a debug function
/// </summary>
/// <param name="pos"></param>
/// <param name="tag"></param>
static void Addtomap(utmpos pos, string tag)
{
polygons.Markers.Add(new GMapMarkerWP(pos.ToLLA(), tag));
}
