/// <summary>
/// Changes the zoom keeping a specified point on same place.
/// </summary>
/// <param name="zoomOffset">Positive - zoom in, Negative - zoom out</param>
/// <param name="screenPosition">Screen position</param>
/// <returns>True - if zoom changed, False - if zoom not changed</returns>
public bool ZoomOnPoint(float zoomOffset, Vector2 screenPosition)
{
float newZoom = Mathf.Clamp(map.floatZoom + zoomOffset, 3, OnlineMaps.MAXZOOM);
if (Math.Abs(newZoom - map.floatZoom) < float.Epsilon)
{
return(false);
}
double mx, my;
bool hit = GetCoords(screenPosition, out mx, out my);
if (!hit)
{
return(false);
}
map.dispatchEvents = false;
int zoom = map.zoom;
double tx, ty, tmx1, tmy1, tmx2, tmy2;
map.GetTilePosition(out tx, out ty);
map.projection.CoordinatesToTile(mx, my, zoom, out tmx1, out tmy1);
double ox = tx - tmx1;
double oy = ty - tmy1;
map.floatZoom = newZoom;
GetCoords(screenPosition, out mx, out my);
map.projection.CoordinatesToTile(mx, my, zoom, out tmx2, out tmy2);
double ox2 = tx - tmx2;
double oy2 = ty - tmy2;
tx -= ox - ox2;
ty -= oy - oy2;
map.projection.TileToCoordinates(tx, ty, zoom, out tx, out ty);
map.SetPosition(tx, ty);
map.dispatchEvents = true;
map.DispatchEvent(OnlineMapsEvents.changedPosition, OnlineMapsEvents.changedZoom);
if (OnMapZoom != null)
{
OnMapZoom();
}
return(true);
}
/// <summary>
/// Changes the zoom keeping a specified point on same place.
/// </summary>
/// <param name="zoomOffset">Positive - zoom in, Negative - zoom out</param>
/// <param name="screenPosition">Screen position</param>
/// <returns>True - if zoom changed, False - if zoom not changed</returns>
public bool ZoomOnPoint(int zoomOffset, Vector2 screenPosition)
{
int newZoom = Mathf.Clamp(map.zoom + zoomOffset, 3, OnlineMaps.MAXZOOM);
if (newZoom == map.zoom)
{
return(false);
}
double mx, my;
bool hit = GetCoords(out mx, out my, screenPosition);
if (!hit)
{
return(false);
}
double ox, oy;
map.GetPosition(out ox, out oy);
map.dispatchEvents = false;
map.zoom = newZoom;
map.SetPosition(mx, my);
double px, py;
map.GetPosition(out px, out py);
if (GetCoords(out mx, out my, screenPosition))
{
px += px - mx;
py += py - my;
map.SetPosition(px, py);
}
else
{
map.SetPosition(ox, oy);
}
map.dispatchEvents = true;
map.DispatchEvent(OnlineMapsEvents.changedPosition, OnlineMapsEvents.changedZoom);
if (OnMapZoom != null)
{
OnMapZoom();
}
return(true);
}