protected override void MouseDown(MapDocument document, MapViewport viewport, OrthographicCamera camera, ViewportEvent e)
{
var vp = viewport;
if (vp == null)
{
return;
}
var gs = document.Map.Data.GetOne <GridData>()?.Grid?.Spacing ?? 64;
_state = GetStateAtPoint(document, e.X, e.Y, camera, out _stateCamera);
if (_state == State.None && KeyboardState.Shift)
{
var p = SnapIfNeeded(camera.ScreenToWorld(e.X, e.Y));
_stateCamera = new Camera {
EyePosition = p, LookPosition = p + Vector3.UnitX * 1.5f * gs
};
document.Map.Data.Add(_stateCamera);
_state = State.MovingLook;
}
if (_stateCamera != null)
{
SetViewportCamera(_stateCamera.EyePosition, _stateCamera.LookPosition);
GetDocumentCameras(document).ForEach(x => x.IsActive = false);
_stateCamera.IsActive = true;
}
}
private State GetStateAtPoint(MapDocument document, int x, int y, OrthographicCamera camera, out Camera activeCamera)
{
var d = 5 / camera.Zoom;
foreach (var cam in GetCameraList(document))
{
var p = camera.Flatten(camera.ScreenToWorld(new Vector3(x, y, 0)));
var pos = camera.Flatten(cam.EyePosition);
var look = camera.Flatten(cam.LookPosition);
activeCamera = cam;
if (p.X >= pos.X - d && p.X <= pos.X + d && p.Y >= pos.Y - d && p.Y <= pos.Y + d)
{
return(State.MovingPosition);
}
if (p.X >= look.X - d && p.X <= look.X + d && p.Y >= look.Y - d && p.Y <= look.Y + d)
{
return(State.MovingLook);
}
}
activeCamera = null;
return(State.None);
}