NullReferenceError, Tilemap Array with Transforms and Raycast (C# with Demo)

hi there..

i created a tilemap(x,y) array, wich holds a bunch of transforms (child objects). The transforms are set into the array via their (int)(positions/tilesize)

1st problem: I added a Debug.LogError to the Array setting - wich only activates if an array field is != null.. wich means - this array position is already filled. And it happens here and there, that this message appears - and i´ve no clue why.. it seems like the calculation for the array field sometimes equals the result of the neightbour tile :/

2nd problem: I try to hit each tile with a raycast on the mouseposition. if i move the mouse over a tile, i get a NullreferenceError..

NullReferenceException: Object reference not set to an instance of an object

Map_Loader.Update () (at Assets/Scripts/Map_Loader.cs:XXX) //XXX = Line Number To make it simplier.. i created this Demo: [<< KotD Demo >>][1] Here´s the complete maploader Script with the Array thing: using UnityEngine; using System.Collections;
public class Map_Loader : MonoBehaviour {
public int scrollspeed = 10; public int zoomspeed = 20; public int rotatespeed = 5;
public int mapsize_x = 1; public int mapsize_y = 1;
public Vector3 mouse3d; public Vector2 mouse3dtile;
public GameObject TilemapHolder; public GameObject kamera; public GameObject kamera_view; public Camera kamera_view_cam; public GameObject BasicMapPrefab; public GameObject BasicBlockForSize;
public int ;
public GameObject DirtBlock; public GameObject DirtStraight; public GameObject DirtInnerCurver; public GameObject DirtOuterCurver; public GameObject DirtRoof; public GameObject DirtGold; public GameObject DirtDitrima; public GameObject DirtFloor;
public int generateChunkSize = 64;
public int __ ;
//public BlockStats[][] tilemap; BlockStats scriptholder; public Transform[,] tilemap;

Ray mousepoint; RaycastHit hit; Vector3 size; Vector2 old_transform = new Vector2(0,0); Vector2 new_transform = new Vector2(0,0); int running_id = 0; Transform childholder;
// Use this for initialization void Start () {
MeshFilter mf = BasicBlockForSize.GetComponent(typeof(MeshFilter)) as MeshFilter; if (mf == null){return;} Mesh mesh = mf.sharedMesh; if (mesh == null){return;} size = mesh.bounds.size;
old_transform = new Vector2(0,0); new_transform = new Vector2(0,0);
StartCoroutine(createMap());
kamera.transform.position = new Vector3(((mapsize_x/2)*size.x), 0, ((mapsize_y/2)*size.x)); }
IEnumerator createMap() { if(mapsize_x > 10 || mapsize_y > 10){ Debug.LogError("Mapsize is out of Bounds. Please set a maximum size of 10*10 Prefabs."); Application.Quit(); } running_id = 1; int maprun_x = 0; int maprun_y = 0; float pos_x = 0; float pos_y = 0; int blockid = 0; int Array_index_x = 0; int Array_index_y = 0; GameObject[] created_block; created_block = new GameObject[101];
//tilemap = new BlockStats[320][]; //for(maprun_x=0; maprun_x<320; maprun_x++){ //tilemap[maprun_x] = new BlockStats[320]; //} tilemap = new Transform[321,321];
for(maprun_x=0; maprun_x<101; maprun_x++){ created_block[maprun_x] = null; }
blockid = 0;
for(maprun_y=0; maprun_y //Detach children and add them to the Block_Holder
for(maprun_x=0; maprun_x -1; maprun_y--){ childholder.GetChild(maprun_y).name = "Tile_"+running_id; childholder.GetChild(maprun_y).parent = TilemapHolder.transform; running_id ++; }
yield return 0;
//Debug.Log("PARENT_ID: " + maprun_x + " von " + (blockid-1)); childholder.DetachChildren(); Destroy(created_block[maprun_x]); } }
//Store objects in the tilemap childholder = TilemapHolder.transform; for(maprun_y=childholder.childCount-1; maprun_y>-1; maprun_y--){ Array_index_x = Mathf.FloorToInt(childholder.GetChild(maprun_y).position.x/size.x); Array_index_y = Mathf.FloorToInt(childholder.GetChild(maprun_y).position.z/size.x); Debug.Log(Array_index_x + " | " + Array_index_y); //tilemap[Array_index_x][Array_index_y] = gameObject.GetComponent(); if(tilemap[(int)Array_index_x, (int)Array_index_y] != null){ Debug.LogError("pos " + Array_index_x + "," + Array_index_y + " is not null"); } else{ tilemap[(int)Array_index_x, (int)Array_index_y] = childholder.GetChild(maprun_y); Debug.Log(tilemap[(int)Array_index_x, (int)Array_index_y]); } } Debug.Log(tilemap); //Getting the GO of a Script: GO = tilemap[x][y].GameobjectRef; } // Update is called once per frame void Update () { if(Input.mousePosition.x < 10) {kamera.transform.Translate(-scrollspeed*Time.deltaTime,0,0);} else if(Input.mousePosition.x > Screen.width-10) {kamera.transform.Translate(scrollspeed*Time.deltaTime,0,0);} if(Input.mousePosition.y < 10) {kamera.transform.Translate(0,0,-scrollspeed*Time.deltaTime);} else if(Input.mousePosition.y > Screen.height-10) {kamera.transform.Translate(0,0,scrollspeed*Time.deltaTime);} if(Input.GetKey(KeyCode.End) && kamera_view.camera.fieldOfView < 70) // back {kamera_view.camera.fieldOfView += zoomspeed*Time.deltaTime;} else if(Input.GetKey(KeyCode.Home) && kamera_view.camera.fieldOfView > 30) // forward {kamera_view.camera.fieldOfView -= zoomspeed*Time.deltaTime;} else if(Input.GetAxis("Mouse ScrollWheel") < 0 && kamera_view.camera.fieldOfView < 70) // back {kamera_view.camera.fieldOfView += zoomspeed*3*Time.deltaTime;} else if(Input.GetAxis("Mouse ScrollWheel") > 0 && kamera_view.camera.fieldOfView > 30) // forward {kamera_view.camera.fieldOfView -= zoomspeed*3*Time.deltaTime;} if(Input.GetKey(KeyCode.Delete)) {kamera.transform.Rotate(new Vector3(0,-rotatespeed*Time.deltaTime,0));} else if(Input.GetKey(KeyCode.PageDown)) {kamera.transform.Rotate(new Vector3(0,rotatespeed*Time.deltaTime,0));} kamera.transform.position = new Vector3(kamera.transform.position.x, 0, kamera.transform.position.z); //Get 3D Mouse Position //if (Input.GetMouseButton(0)) { mousepoint = Camera.main.ScreenPointToRay(Input.mousePosition); if (Physics.Raycast(mousepoint, out hit)) { if (hit.transform != null) { mouse3dtile = new Vector2(Mathf.FloorToInt(hit.transform.position.x/size.x), Mathf.FloorToInt(hit.transform.position.z/size.x)); new_transform = mouse3dtile; Debug.Log(" X: " + new_transform.x + "| Y: " + new_transform.y + "| INHALT: " + tilemap[(int)new_transform.x, (int)new_transform.y]); if((int)old_transform.x != (int)new_transform.x || (int)old_transform.y != (int)new_transform.y){ scriptholder = tilemap[(int)old_transform.x, (int)old_transform.y].gameObject.GetComponent(); scriptholder.highlightoff(); scriptholder = tilemap[(int)new_transform.x, (int)new_transform.y].gameObject.GetComponent(); scriptholder.highlighton(); old_transform = new Vector2((int)new_transform.x, (int)new_transform.y); } //highlight model, reset old_transform, set new old_transform } } else { //reset old_transform // if((int)old_transform.x != -1 && (int)old_transform.y != -1){ // scriptholder = tilemap[(int)old_transform.x, (int)old_transform.y].gameObject.GetComponent(); // scriptholder.highlightoff(); // old_transform = new Vector2(-1,-1); // } } //} //mouse3dtile = new Vector3((int)(mouse3d.x/size.x)*size.x, 0, (int)(mouse3d.x/size.x)*size.x); } } And here the Block-Dummy Script (wich is included in EVERY Tile): using UnityEngine; using System.Collections; public class BlockStats : MonoBehaviour { Transform _transform; GameObject SelfObject; Color32 basic_color = new Color32(150,150,150,255); Color32 highlightcolor = new Color32(250,250,150,255); //GameObject SelfObject = gameObject; // Use this for initialization void Start () { _transform = transform; SelfObject = _transform.gameObject; basic_color = SelfObject.renderer.material.color; } public void highlightoff(){ SelfObject.renderer.material.color = basic_color; } public void highlighton(){ SelfObject.renderer.material.color = highlightcolor; } } I hope someone can help me out - cause i´m waiting for help in the forum for a while now.. and got no fixing answer :'-( thanks for reading [1]: http://blackdevilcreations.de/KotD.rar