Hi there…
Since over 6 Months i want to create an Isometric Terrain mapper.
This is my Current isometric Grid, and how the Tilemap is structured with that:
This is my current SceneView Editor approach to calculate the Tilemap position of the Tile, the mouse is hovering:
private Rect SceneUIRect = new Rect(5,5,200,320);
private Vector3 MouseTilePosition;
private Event mouseAction;
void OnSceneGUI(){
//Only active when Editor is enabled (2D mode)
if(ViewMode == true && myTarget != null){
//Get Mouse 2D World Position
MouseTilePosition = Event.current.mousePosition;
MouseTilePosition.y = SceneView.currentDrawingSceneView.camera.pixelHeight - MouseTilePosition.y;
MouseTilePosition = SceneView.currentDrawingSceneView.camera.ScreenToWorldPoint(MouseTilePosition);
//Get the Current Event and ask for Mouse clicks
mouseAction = Event.current;
if(mouseAction.type == EventType.MouseDown && Event.current.button == 0){ //Mouse Left
//Fix Position
MouseTilePosition.x += 64;
//Clamp the Position to be positive only!
MouseTilePosition.x = (MouseTilePosition.x < 0)?0:MouseTilePosition.x;
MouseTilePosition.y = (MouseTilePosition.y < 0)?0:MouseTilePosition.y;
MouseTilePosition.z = Mathf.Clamp(MouseTilePosition.z, 0, 1);
Debug.Log(MouseTilePosition.y);
//In Odd lines, reduce X by the half Tile Width
if((int)(MouseTilePosition.y/myTarget.TileSize.y)%2 == 1){ //Odd line 1,3,5,7...
MouseTilePosition.x -= myTarget.TileSize.x/2;
}
//Get the Tile Index from world Position
myTarget.TileIndex.x = (int)(MouseTilePosition.x/myTarget.TileSize.x);
myTarget.TileIndex.y = (int)(MouseTilePosition.y/myTarget.TileSize.y);
//Clamp the Indexes to be inside the mapsize only
myTarget.TileIndex.x = Mathf.Clamp(myTarget.TileIndex.x, 0, myTarget.Mapsize.x-1);
myTarget.TileIndex.y = Mathf.Clamp(myTarget.TileIndex.y, 0, myTarget.Mapsize.y-1);
//Unmark the last selected tile (if there is one), and mark the new selected one.
if(myTarget.GlobalTilemap != null){
if(myTarget.GlobalTilemap[(int)myTarget.LastTileIndex.y][(int)myTarget.LastTileIndex.x].TileObject != null)
myTarget.GlobalTilemap[(int)myTarget.LastTileIndex.y][(int)myTarget.LastTileIndex.x].TileObject.GetComponent<SpriteRenderer>().color = Color.white;
if(myTarget.GlobalTilemap[(int)myTarget.TileIndex.y][(int)myTarget.TileIndex.x].TileObject != null)
myTarget.GlobalTilemap[(int)myTarget.TileIndex.y][(int)myTarget.TileIndex.x].TileObject.GetComponent<SpriteRenderer>().color = Color.red;
//Set the last selected index
myTarget.LastTileIndex = myTarget.TileIndex;
}
//Eat mouse Event
mouseAction.Use();
}
else if(mouseAction.type == EventType.MouseDown && Event.current.button == 1){ //Mouse Right
mouseAction.Use();
}
//Add SceneView Default UI
HandleUtility.AddDefaultControl(GUIUtility.GetControlID(FocusType.Passive));
HandleUtility.Repaint();
//Add own UI
Handles.BeginGUI();
GUILayout.BeginArea(SceneUIRect);
GUILayout.EndArea();
Handles.EndGUI();
}
}
And here is the Tilemap Code to this Editor Script
using UnityEngine;
using UnityEngine.UI;
using System;
using System.Collections;
using System.Collections.Generic;
public class Sc_IsoTiles_Tilemap : MonoBehaviour {
[System.Serializable]
public class TilemapData{
public int TileID;
public float TileElevation;
public string TileSpritename;
public GameObject TileObject;
public TilemapData(){
TileID = 0;
TileElevation = 0.0f;
TileSpritename = "Sprite_Tile_Basic";
TileObject = null;
}
}
public List<List<TilemapData>> GlobalTilemap;
public GameObject BasicTileObject;
public Vector2 Mapsize;
public Vector2 TileSize;
public Vector2 TilemapSize;
[HideInInspector]
public Vector2 LastTileIndex, TileIndex = Vector2.zero;
[HideInInspector]
public int TileRealPixelheight;
private int IDrunthrough;
private bool Indent;
void Start(){
}
public void FillTilemap(){
IDrunthrough = 0;
Indent = false;
TileRealPixelheight = BasicTileObject.GetComponent<SpriteRenderer>().sprite.texture.height;
if(GlobalTilemap != null){
GlobalTilemap.Clear();
}
GlobalTilemap = new List<List<TilemapData>>();
for(int iy = 0; iy < (int)Mapsize.y; iy++){
GlobalTilemap.Add(new List<TilemapData>());
for(int ix = 0; ix < (int)Mapsize.x; ix++){
GlobalTilemap[iy].Add(new TilemapData());
GlobalTilemap[iy][ix].TileObject = (GameObject)Instantiate(BasicTileObject, Vector3.zero, Quaternion.Euler(0,0,0));
GlobalTilemap[iy][ix].TileObject.transform.parent = transform;
GlobalTilemap[iy][ix].TileObject.transform.name = "Tile #" + IDrunthrough + " [Basic] on YX-Pos [" + iy + "," + ix + "]";
GlobalTilemap[iy][ix].TileObject.transform.position = new Vector3(
(ix*TileSize.x) + ((Indent)?(TileSize.x/2):0),
(iy*TileSize.y),
iy*0.01f
);
if(GlobalTilemap[iy][ix].TileObject.transform.FindChild("Canvas") != null){
GlobalTilemap[iy][ix].TileObject.transform.FindChild("Canvas").FindChild("Text").GetComponent<Text>().text = "YX\n" + iy + "," + ix;
}
IDrunthrough ++;
}
Indent = (Indent)?false:true;
}
TilemapSize.x = GlobalTilemap.Count;
TilemapSize.y = GlobalTilemap[0].Count;
}
public void WhitenTilemap(){
if(GlobalTilemap != null){
TileRealPixelheight = BasicTileObject.GetComponent<SpriteRenderer>().sprite.texture.height;
TilemapSize.x = GlobalTilemap.Count;
TilemapSize.y = GlobalTilemap[0].Count;
for(int iy = 0; iy < (int)Mapsize.y; iy++){
for(int ix = 0; ix < (int)Mapsize.x; ix++){
GlobalTilemap[iy][ix].TileObject.GetComponent<SpriteRenderer>().color = Color.white;
}
}
}
}
public void ClearTilemap(){
if(GlobalTilemap == null){
return;
}
GlobalTilemap.Clear();
for(int childs = transform.childCount-1; childs > -1; childs--){
if(transform.GetChild(childs) != null){
DestroyImmediate(transform.GetChild(childs).gameObject);
}
}
}
public void CreateMap(){
}
}
So… i´m working on this ******* Code for 2 Months now… and can´t find a solution to calculate the Tilemap Position of a Tile…
As you can see in the Screenshot above:
The red Tile is selected - But the green Dot is the Mouse…
I can´t get this to work and i seriously will give this up, when i can´t find a solution for this problem…
So…
Please… i beg on you… HELP ME 
How can i calculate the Tilemap Position to access the correct Tile of my Tilemap Array?
Edit:
Basic Sprite in the Attachment
