SetDestination's and CalculatePath's Path State Return Works Too Late

Question

Hi all, I'm trying to make a turret defence game. And i'm trying to check if my navmesh agent can reach to target if i place the turret on selected grid by using bool return of SetDestination. The problem is, it reports that path is blocked when i try to place another turret after i placed the turret actually blocking path. Below is my placement function of turret placement script.

Edit: I tried with both SetDestination and CalculatePath. Nothing changed, below is the one i tried with CalculatePath.

Thanks in advance.

     void GhostComeAlive ()
     {
         aGridSelected = false;
 
         //first create a temporary gameobject to check if path can complete itself.
         GameObject gridToCheck = lastGridMousePassedOver;
         GameObject navMeshCheckerTemp = Instantiate(GhostTurretG, gridToCheck.transform.position, gridToCheck.transform.rotation) as GameObject;
         GameObject navMeshChecker = Instantiate(navMeshCheckerTemp, navMeshCheckerTemp.transform.position, navMeshCheckerTemp.transform.rotation) as GameObject;
         Destroy (navMeshCheckerTemp);
 
         //calculate the path.
         NavMeshPath path = new NavMeshPath();
         navMeshValidator.GetComponent<NavMeshAgent>().CalculatePath(navMeshTarget.transform.position, path);
 
         //now check if it's valid.
         if (path.status == NavMeshPathStatus.PathComplete)
         {
             Debug.Log ("Path is valid");
 
             //it's valid. let the temporary turret to remain and relase the global object.
             Destroy(GhostTurretG);
             GhostTurretG = null;
 
             //delete the grid from available grid's list.
             listOfGridsAvailable.Remove(gridToCheck);
 
             //destroy the grid.
             Destroy(gridToCheck);
         }
         else
         {
             Debug.Log ("Path is not valid");
 
             //it's invalid. destroy the temporary turret and let global object to remain.
             Destroy(navMeshChecker);
         }
 
         lastGridMousePassedOver = null;
         aGridSelected = false;
     }

Answer 1

Allright, this solved the problem, temporarily... Cause I overload "WaitForEndOfFrame"s.

     IEnumerator GhostComeAlive ()
     {
         aGridSelected = false;
 
         //first create a temporary gameobject to check if path can complete itself.
         GameObject gridToCheck = lastGridMousePassedOver;
         GameObject navMeshChecker = Instantiate(GhostTurretG, gridToCheck.transform.position, gridToCheck.transform.rotation) as GameObject;
 
         yield return new WaitForEndOfFrame();
         yield return new WaitForEndOfFrame();
         yield return new WaitForEndOfFrame();
         yield return new WaitForEndOfFrame();
         yield return new WaitForEndOfFrame();
         yield return new WaitForEndOfFrame();
 
         //calculate the path.
         NavMeshPath path = new NavMeshPath();
 //        navMeshValidator.GetComponent<NavMeshAgent>().CalculatePath(navMeshTarget.transform.position, path);
 //
 //        //now check if it's valid.
 //        if (path.status == NavMeshPathStatus.PathComplete)
         NavMesh.CalculatePath(navMeshValidator.transform.position, navMeshTarget.transform.position, NavMesh.AllAreas, path);
 
         yield return new WaitForEndOfFrame();
         yield return new WaitForEndOfFrame();
         yield return new WaitForEndOfFrame();
         yield return new WaitForEndOfFrame();
         yield return new WaitForEndOfFrame();
         yield return new WaitForEndOfFrame();
 
         if (path.status == NavMeshPathStatus.PathComplete)
         {
             Debug.Log ("Path is valid");
 
             //it's valid. let the temporary turret to remain and relase the global object.
             Destroy(GhostTurretG);
             GhostTurretG = null;
 
             //delete the grid from available grid's list.
             listOfGridsAvailable.Remove(gridToCheck);
 
             //destroy the grid.
             Destroy(gridToCheck);
         }
         else
         {
             Debug.Log ("Path is not valid");
 
             //it's invalid. destroy the temporary turret and let global object to remain.
             Destroy(navMeshChecker);
         }
 
         lastGridMousePassedOver = null;
         aGridSelected = false;
     }
 }

SetDestination's and CalculatePath's Path State Return Works Too Late

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