private State GetStateAtPoint(int x, int y, Viewport2D viewport, out Camera activeCamera)
{
var d = 5 / viewport.Zoom;
foreach (var cam in GetCameras())
{
var p = viewport.ScreenToWorld(x, y);
var pos = viewport.Flatten(cam.EyePosition);
var look = viewport.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);
}
public override void MouseDown(ViewportBase viewport, ViewportEvent e)
{
var vp = viewport as Viewport2D;
if (vp == null)
{
return;
}
_state = GetStateAtPoint(e.X, vp.Height - e.Y, vp, out _stateCamera);
if (_state == State.None && KeyboardState.Shift)
{
var p = SnapIfNeeded(vp.Expand(vp.ScreenToWorld(e.X, vp.Height - e.Y)));
_stateCamera = new Camera {
EyePosition = p, LookPosition = p + Coordinate.UnitX * 1.5m * Document.Map.GridSpacing
};
Document.Map.Cameras.Add(_stateCamera);
_state = State.MovingLook;
}
if (_stateCamera != null)
{
SetViewportCamera(_stateCamera.EyePosition, _stateCamera.LookPosition);
Document.Map.ActiveCamera = _stateCamera;
}
}