private void OnEnable()
{
_occupierCache = GetComponent <GridOccupier>();
}
private static void OnSceneGUI(SceneView _)
{
if (_mapGridInstanceTransform == default)
{
return;
}
var mapGrid = _mapGridInstanceTransform.GetComponent <MapGridData>();
if (mapGrid == default)
{
return;
}
if (mapGrid.GridX == 0 || mapGrid.GridY == 0)
{
throw new ApplicationException($"GridX and GridY of MapGrid cannot be 0!");
}
if (Event.current.type == EventType.DragUpdated || Event.current.type == EventType.DragPerform)
{
DragAndDrop.visualMode = DragAndDropVisualMode.Copy; // show a drag-add icon on the mouse cursor
if (DraggedObject == default)
{
DraggedObject = (GameObject)DragAndDrop.objectReferences[0];
DraggedGridOccupier = DraggedObject.GetComponent <GridOccupier>();
_initialDraggedGridX = DraggedGridOccupier.X;
_initialDraggedGridY = DraggedGridOccupier.Y;
}
var ray = Camera.current.ScreenPointToRay(new Vector3(Event.current.mousePosition.x, Camera.current.pixelRect.height - Event.current.mousePosition.y, 0.0f));
var plane = new Plane(_mapGridInstanceTransform.up, _mapGridInstanceTransform.position);
if (plane.Raycast(ray, out var intersectionDistance))
{
var pointOfIntersection = ray.origin + ray.direction * intersectionDistance;
DraggedGridX = Mathf.FloorToInt(pointOfIntersection.x / mapGrid.GridX);
DraggedGridY = Mathf.FloorToInt(pointOfIntersection.z / mapGrid.GridY);
var gridOccupier = DraggedObject.GetComponent <GridOccupier>();
if (gridOccupier != default)
{
gridOccupier.X = DraggedGridX;
gridOccupier.Y = DraggedGridY;
}
}
if (Event.current.type == EventType.DragPerform)
{
DragAndDrop.AcceptDrag();
var newObj = (GameObject)PrefabUtility.InstantiatePrefab(DraggedObject);
newObj.transform.position = new Vector3(DraggedGridX * mapGrid.GridX, 0f, DraggedGridY * mapGrid.GridY);
var gridOccupier = newObj.GetComponent <GridOccupier>();
if (gridOccupier != default)
{
gridOccupier.X = DraggedGridX;
gridOccupier.Y = DraggedGridY;
}
Undo.RegisterCreatedObjectUndo(newObj, "Object dragged to scene");
Selection.activeGameObject = newObj;
DraggedObject = default;
DraggedGridOccupier = default;
}
Event.current.Use();
}
else if (Event.current.type == EventType.DragExited)
{
if (DraggedGridOccupier != default)
{
DraggedGridOccupier.X = _initialDraggedGridX;
DraggedGridOccupier.Y = _initialDraggedGridY;
DraggedObject = default;
DraggedGridOccupier = default;
}
}
}
