using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CheckTerrainTexture : MonoBehaviour
{
    //This scripts goes inside the people/Animals or whatever to detect the terrain's textures. 
    //(Do not use it with singlenton! There's no point).

    public Transform playerTransform;
    public Terrain terrain;

    public int posX;
    public int posZ;
    public float[] textureValues;

    void Start()
    {
        terrain = Terrain.activeTerrain;
        playerTransform = gameObject.transform;
    }

    void Update()
    {
        // For better performance, move this out of update 
        // and only call it when you need a footstep.
        //GetTerrainTexture();
    }

    public void GetTerrainTexture()
    {
        ConvertPosition(playerTransform.position);
        CheckTexture();
    }

    void ConvertPosition(Vector3 playerPosition)
    {
        Vector3 terrainPosition = playerPosition - terrain.transform.position;

        Vector3 mapPosition = new Vector3
        (terrainPosition.x / terrain.terrainData.size.x, 0,
        terrainPosition.z / terrain.terrainData.size.z);

        float xCoord = mapPosition.x * terrain.terrainData.alphamapWidth;
        float zCoord = mapPosition.z * terrain.terrainData.alphamapHeight;

        posX = (int)xCoord;
        posZ = (int)zCoord;
    }

    void CheckTexture() //Here's all the textures of the terrain.
    {
        float[,,] aMap = terrain.terrainData.GetAlphamaps(posX, posZ, 1, 1);
        textureValues[0] = aMap[0, 0, 0];
        textureValues[1] = aMap[0, 0, 1];
        textureValues[2] = aMap[0, 0, 2];
        textureValues[3] = aMap[0, 0, 3];
        textureValues[4] = aMap[0, 0, 4];
        textureValues[5] = aMap[0, 0, 5];
        textureValues[6] = aMap[0, 0, 6];
        textureValues[7] = aMap[0, 0, 7];
        textureValues[8] = aMap[0, 0, 8];
        textureValues[9] = aMap[0, 0, 9];
    }
}