private void Update()
{
if (Input.GetMouseButtonDown(0))
{
RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
//handle only if we click exactly on visible part of RelationPoint
if (hit.collider != null && hit.collider.tag == "RelationPoint")
{
//init creating relationship, save start point
if (!_creatingRelationship)
{
_creatingRelationship = true;
_startRelationPointRenderer = hit.collider.GetComponent <SpriteRenderer> ();
_startRelationPointRenderer.color = Color.black;
_startRelationPoint = hit.collider.transform;
}
else
{
Transform endRelationPoint = hit.collider.transform;
//if second click is not on the same rectangle create relationship
if (_startRelationPoint.parent != endRelationPoint.parent)
{
GameObject relationLine = Instantiate(relationLinePrefab);
LineRenderer relationLineRenderer = relationLine.GetComponent <LineRenderer> ();
RelationLineController relationLineController = relationLine.GetComponentInChildren <RelationLineController> ();
_InitRelationPoint(_startRelationPoint, relationLineRenderer, relationLineController, true);
_InitRelationPoint(endRelationPoint, relationLineRenderer, relationLineController, false);
relationLineController.UpdateColliderPosition();
}
_CancelCreating();
}
}
else if (_creatingRelationship)
{
//if second click has not hit relation point just cancel creating
_CancelCreating();
}
}
}
private void _InitRelationPoint(Transform relationPoint, LineRenderer relationLineRenderer, RelationLineController relationLineController, bool isStart)
{
RelationPointController relationPointController = relationPoint.GetComponent <RelationPointController> ();
Vector3 position = relationPoint.position;
relationLineRenderer.SetPosition(isStart ? 0 : 1, position);
relationLineController.SaveRelationPoint(relationPointController, isStart);
relationPointController.SaveRelationLine(relationLineRenderer, isStart);
}