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

public class VertexObjectSpawner : MonoBehaviour
{

    #region Variables
    public GameObject[] objects;
    public Mesh mesh;
    public GameObject spawnHolder;
    public Transform offsetter;
    public float objectSpawnSpeed = 1f;
    public Vector3 inverseRotation;
    public bool coroutined = true;
    public KeyCode togglePhysicsKey = KeyCode.Space;
    public KeyCode toggleCoroutinedPhysicssKey = KeyCode.T;
    public bool correctRotation = true;
    public bool toggleWithCoroutine = false;
    public bool toggleWithCoroutineReverse = false;
    #endregion
    #region Texture Color Parsing
    public GameObject model;
    public Texture2D sourceTex;
    public float warpFactor = 1.0F;
    private Texture2D destTex;
    private Color[] destPix;
    private Color[] vertColor;
    #endregion

    private Quaternion objectRotation;
    private WaitForSeconds wait;
    private List<GameObject> spawned = new List<GameObject>();

    private void Awake(){
        GetTextureVertexColor();
    }
    private void Start()
    {
        if (!spawnHolder)
        {
            spawnHolder = new GameObject("Spawn Holder");
        }
        wait = new WaitForSeconds(objectSpawnSpeed);
        if (coroutined)
        {
            StartCoroutine(Spawn());
        }
        else
        {
            Spawn01();
        }
        
    }

    private void Update()
    {
        if (Input.GetKeyDown(togglePhysicsKey))
        {
            if (toggleWithCoroutine)
            {
                StartCoroutine(TogglePhysics01(!spawned[spawned.Count - 1].GetComponent<Rigidbody>().isKinematic, toggleWithCoroutineReverse));
            }
            else
            {
                TogglePhysics(!spawned[spawned.Count - 1].GetComponent<Rigidbody>().isKinematic);
            }
        }
        if (Input.GetKeyDown(toggleCoroutinedPhysicssKey))
        {
            toggleWithCoroutineReverse = !toggleWithCoroutineReverse;
            toggleWithCoroutine = !toggleWithCoroutine;
        }
    }

    private IEnumerator Spawn()
    {
        objectRotation = offsetter.rotation;
        for (int i = 0; i < mesh.vertexCount; i++)
        {
            GameObject spawn = Instantiate(objects[Random.Range(0, objects.Length)], mesh.vertices[i] + offsetter.position, Quaternion.Euler(inverseRotation), spawnHolder.transform);
            
            spawn.GetComponent<Renderer>().sharedMaterial.color = vertColor[i];
            spawned.Add(spawn);
            yield return objectSpawnSpeed;
        }
        if (correctRotation)
        {
            offsetter.rotation = Quaternion.identity;
        }
    }

    private void Spawn01()
    {
        objectRotation = offsetter.rotation;
        for (int i = 0; i < mesh.vertexCount; i++)
        {
            GameObject spawn = Instantiate(objects[Random.Range(0, objects.Length)], mesh.vertices[i] + offsetter.position, Quaternion.Euler(inverseRotation), spawnHolder.transform);
            spawn.GetComponent<Renderer>().sharedMaterial.color = vertColor[i];
            spawned.Add(spawn);
        }
        if (correctRotation)
        {
            offsetter.rotation = Quaternion.identity;
        }
    }

    private void TogglePhysics(bool kinematic)
    {
        for (int i = 0; i < spawned.Count; i++)
        {
            spawned[i].GetComponent<Rigidbody>().isKinematic = kinematic;
        }
    }

    private IEnumerator TogglePhysics01(bool kinematic, bool reverse)
    {
        if (reverse)
        {
            for (int i = spawned.Count - 1; i > 0; i--)
            {
                spawned[i].GetComponent<Rigidbody>().isKinematic = kinematic;
                yield return objectSpawnSpeed;
            }
        }
        else
        {
            for (int i = 0; i < spawned.Count; i++)
            {
                spawned[i].GetComponent<Rigidbody>().isKinematic = kinematic;
                yield return objectSpawnSpeed;
            }
        }
    }
    public void GetTextureVertexColor()
    {
        Vector3[] vertices = mesh.vertices;
        Vector2[] uvs = new Vector2[vertices.Length];
        for(int i =0; i< uvs.Length; i++){
            uvs[i] = new Vector2(vertices[i].x, vertices[i].z);
        }
        destTex = new Texture2D(sourceTex.width, sourceTex.height);
        destPix = new Color[destTex.width * destTex.height];

        vertColor = new Color[vertices.Length];
        
        // Trying to map the uv color to instantiated cubes.....
        int y = 0;
        while (y < destTex.height / Mathf.Sqrt(uvs.Length))
        {
            int x = 0;
            while (x < destTex.width / Mathf.Sqrt(uvs.Length))
            {
                // float xFrac = x * uvs[y * destTex.width + x].x / (destTex.width - 1);
                // float yFrac = y * uvs[y * destTex.width + x].y / (destTex.height - 1);
                float xFrac = x * uvs[(x+1)*(y+1)].x / (destTex.width - 1);
                float yFrac = y * uvs[(x+1)*(y+1)].y / (destTex.height - 1);
                // float warpXFrac = Mathf.Pow(xFrac, warpFactor);
                // float warpYFrac = Mathf.Pow(yFrac, warpFactor);
                // destPix[y * destTex.width + x] = sourceTex.GetPixelBilinear(xFrac, yFrac);
                vertColor[y * destTex.width + x] = sourceTex.GetPixelBilinear(xFrac, yFrac);
                x++;
            }
            y++;
        }
        Mesh modelMesh = model.GetComponent<MeshFilter>().mesh;
        Color32[] colors = new Color32[vertices.Length];
        int j = 0;
        while (j < vertices.Length) {
            colors[j] = Color.Lerp(Color.red, Color.green, vertices[j].y);
            j++;
        }
        modelMesh.colors32 = colors;

        Debug.Log(uvs.Length);
        destTex.SetPixels(destPix);
        Debug.Log(vertColor.Length);
        Debug.Log(destTex.height / Mathf.Sqrt(uvs.Length) * destTex.width / Mathf.Sqrt(uvs.Length));
        destTex.Apply();
        // GetComponent<Renderer>().material.mainTexture = destTex;
    }
}