public override void Update()
{
Vector3 mouse;
if (RaycastMousePosition(out mouse))
{
if (Input.GetKeyDown(KeyCode.R))
{
ghost.Rotate(true);
rotations = (rotations + 1) % 4;
}
Vector3 snappedPosition = grid.SnapObjectWorldPosition(mouse, ghost);
ghost.transform.position = snappedPosition;
if (Input.GetMouseButtonDown(0) && CanPlaceObject(snappedPosition, ghost))
{
if (EventSystem.current.IsPointerOverGameObject() == false)
{
if (grid.PlaceObject(snappedPosition, ghost))
{
OnObjectPlaced(ghost);
ghost = CreateGhost();
ghost.transform.position = snappedPosition;
}
}
}
}
}
protected virtual void OnObjectRemoved(GridObject obj)
{
if (ObjectRemoved != null)
{
ObjectRemoved.Invoke(obj);
}
}
public bool PlaceObject(Vector2 localPosition, GridObject obj)
{
Vector2 zeroPos = localPosition - obj.Origin + new Vector2(tileSize * 0.5f, tileSize * 0.5f);
GridCoordinate zeroTilePositon = LocalToGrid(zeroPos);
if (CanPlaceObject(localPosition, obj))
{
for (int x = 0; x < obj.Width; x++)
{
for (int y = 0; y < obj.Height; y++)
{
int tileX = zeroTilePositon.X + x;
int tileY = zeroTilePositon.Y + y;
tiles[tileX, tileY].AddObject(obj);
}
}
obj.transform.parent = transform;
objects.Add(obj);
OnObjectPlaced(obj);
return(true);
}
else
{
return(false);
}
}
protected void OnObjectRemoved(GridObject obj)
{
if (ObjectRemoved != null)
{
ObjectRemoved(obj);
}
}
public bool CanPlaceObject(Vector2 localPosition, GridObject obj)
{
Vector2 zeroPos = localPosition - obj.Origin + new Vector2(tileSize * 0.5f, tileSize * 0.5f);
GridCoordinate zeroTilePositon = LocalToGrid(zeroPos);
for (int x = 0; x < obj.Width; x++)
{
for (int y = 0; y < obj.Height; y++)
{
int tileX = zeroTilePositon.X + x;
int tileY = zeroTilePositon.Y + y;
if (IsValidPosition(tileX, tileY) == false)
{
return(false);
}
if (tiles[tileX, tileY].CanAddObject(obj) == false)
{
return(false);
}
}
}
return(true);
}
public bool CanAddObject(GridObject obj)
{
if (Contains(obj))
{
return(false);
}
if (obj.Obstructive)
{
bool tileObstructed = false;
for (int i = 0; i < objects.Count; i++)
{
tileObstructed = objects[i].Obstructive;
if (tileObstructed)
{
break;
}
}
return(!tileObstructed);
}
return(true);
}
public Vector3 SnapObjectWorldPosition(Vector3 worldPosition, GridObject obj)
{
Vector2 local = WorldToLocal(worldPosition);
Vector2 localSnapped = SnapObjectLocalPosition(local, obj);
Vector3 worldSnapped = LocalToWorld(localSnapped);
return(worldSnapped);
}
public Vector2 SnapObjectLocalPosition(Vector2 localPosition, GridObject obj)
{
Vector2 halfTile = new Vector2(tileSize * 0.5f, tileSize * 0.5f);
Vector2 corner = localPosition - obj.Origin + halfTile;
GridCoordinate cornerGridPos = LocalToGrid(corner);
Vector2 cornerSnapPos = GridToLocal(cornerGridPos) - halfTile;
return(cornerSnapPos + obj.Origin);
}
private GridObject CreateGhost()
{
GridObject obj = Instantiate(objectPrefab);
for (int i = 0; i < rotations; i++)
{
obj.Rotate(true);
}
return(obj);
}
public bool RemoveObject(GridObject obj)
{
if (objects.Remove(obj))
{
obj.OccupiedTiles.Remove(this);
OnObjectRemoved(obj);
return(true);
}
return(false);
}
public bool AddObject(GridObject obj)
{
if (CanAddObject(obj))
{
objects.Add(obj);
obj.OccupiedTiles.Add(this);
OnObjectAdded(obj);
return(true);
}
return(false);
}
public bool RemoveObject(GridObject obj)
{
if (objects.Remove(obj))
{
obj.RemoveFromTiles();
obj.transform.parent = null;
OnObjectRemoved(obj);
return(true);
}
else
{
return(false);
}
}
private void DestroyGridObject(GridObject obj)
{
Destroy(obj.gameObject);
}
protected virtual void OnObjectPlaced(GridObject obj)
{
}
protected virtual bool CanPlaceObject(Vector3 position, GridObject obj)
{
return(grid.CanPlaceObject(position, obj));
}
public bool CanPlaceObject(Vector3 worldPosition, GridObject obj)
{
Vector2 local = WorldToLocal(worldPosition);
return(CanPlaceObject(local, obj));
}
public bool Contains(GridObject obj)
{
return(objects.Contains(obj));
}
protected virtual void OnObjectRemoved(GridObject obj)
{
}
public override void OnActivate()
{
ghost = CreateGhost();
}