/// <summary>
/// Selectable selection logic
/// </summary>
private void CheckLocationSelection()
{
if (_currentTarget == null)
{
onUndefinedSelection?.Invoke();
return;
}
// If we already have a selection => MoveAction
if (HasOneSelected() && !_lastSelected.IsEmpty && _currentTarget.IsEmpty)
{
TransferAction(_currentTarget);
return;
}
// Check if we can select it..
if (!_currentTarget.IsEmpty)
{
if (HasOneSelected())
{
_lastSelected.IsSelected = false;
}
_lastSelected = _currentTarget;
_lastSelected.IsSelected = true;
onSelect?.Invoke();
}
else
{
onUndefinedSelection?.Invoke();
}
}
/// <summary>
/// Cancel current movement action
/// </summary>
public void CancelAction()
{
if (_lastSelected != null)
{
_lastSelected.IsSelected = false;
_lastSelected = null;
onCancel?.Invoke();
}
}
/// <summary>
/// Mouse movement check for target.
/// Used for location highlighting and potential tile information gathering
/// </summary>
private void CheckCurrentTarget(Vector3 mousePos)
{
RaycastHit hit;
Ray ray = _cam.ScreenPointToRay(mousePos);
if (Physics.Raycast(ray, out hit, Mathf.Infinity, selectableLayerMask))
{
// Make sure the selectable has associated script
SnapLocation newRef = hit.transform.GetComponent <SnapLocation>();
// Change state of older one
if (_currentTarget != null && _currentTarget != newRef)
{
_currentTarget.IsLit = false;
}
_currentTarget = newRef;
// Make sure the new reference was indeed a SnapLocation.. maybe not
if (_currentTarget == null)
{
return;
}
// Here the current target is a valid SnapLocation
_currentTarget.IsLit = true;
}
else
{
// We didn't hit this layer
if (_currentTarget != null)
{
_currentTarget.IsLit = false;
_currentTarget = null;
}
}
UpdateInBetween();
}
/// <summary>
/// Moving objects from one tile to another
/// </summary>
/// <param name="moveToTarget"></param>
private void TransferAction(SnapLocation moveToTarget)
{
int towersOnGround = _totalTowerCount - _inventory.GetSize();
// Check if player have already placed all his towers
// Still allow transfers inside the inventory itself.
// Still allow movement inside grid itself.
// Player can place level + 2 amount of towers.
if (FromInventoryToGrid(_lastSelected, moveToTarget) &&
towersOnGround >= _player.GetPlayerLevel() + 2)
{
CancelAction();
return;
}
_currentTarget.ReplaceObject(_lastSelected.GetObject());
// Simply for good practice... this will trigger some event as well
_lastSelected.Clear();
_lastSelected.IsSelected = false;
_lastSelected = null;
onTransfer?.Invoke();
}
private bool FromInventoryToGrid(SnapLocation from, SnapLocation to)
{
return(from.transform.GetComponentInParent <Inventory>() != null && to.transform.GetComponentInParent <Inventory>() == null);
}