VoxelEngine

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

public class ChunkRenderer : MonoBehaviour {


	public Texture basicTexture;
	public int[,,] chunk;


	int height = 6;
	int width = 2;
	int depth = 3;

	LineRenderer lineRenderer;

	MeshCollider meshCollider;
	MeshFilter meshFilter;
	MeshRenderer meshRenderer;
	Mesh mesh;

	// Use this for initialization
	void Start () {
		chunk = new int[width,height,depth];

		// Set Block Type //

		for (int x = 0; x < width; x++)
		{
			for (int y = 0; y < height; y++)
			{
				for (int z = 0; z < depth; z++)
				{
					chunk[x,y,z] = 1;
				}
			}
		}

		// Add Mesh Pieces //

		meshCollider = gameObject.AddComponent<MeshCollider>();
		meshFilter = gameObject.AddComponent<MeshFilter>();
		meshRenderer = gameObject.AddComponent<MeshRenderer>();

		ChunkRender();
	}

	// Update is called once per frame
	void Update () {
		//ChunkRender(chunk);
	}

	public void ChunkRender()
	{
		List<Vector3> vertices = new List<Vector3>();
		List<Vector2> uvs = new List<Vector2>();
		List<int> triangles = new List<int>();

		int vertexIndex = 0;
		int top = 0;
		int north = 0;
		int east = 0;
		int south = 0;
		int west = 0;
		int bottom =  0;

		meshFilter.mesh.Clear();

		for (int x = 0; x < width; x++)
		{
			for (int y = 0; y < height; y++)
			{
				for (int z = 0; z < depth; z++)
				{
					Block block = new Block();
					block.blockType = chunk[x,y,z];

					if (x == width - 1) {
						east = 0;
					} else {
						east = chunk[x + 1, y, z];
					}

					if (x == 0) {
						west = 0;
					} else {
						west = chunk[x - 1, y, z];
					}

					if (y == height - 1) {
						top = 0;
					} else {
						top = chunk[x, y + 1, z];
					}

					if (y == 0) {
						bottom = 0;
					} else {
						bottom = chunk[x, y - 1, z];
					}

					if (z == depth - 1) {
						north = 0;
					} else {
						north = chunk[x, y, z + 1];
					}

					if (z == 0) {
						south = 0;
					} else {
						south = chunk[x, y, z - 1];
					}

					// Check which faces to render //

				// Grassy Block - Finished //

					if (block.blockType == 1 && top == 0)
					{
						vertexIndex = vertices.Count;
						vertices.Add(new Vector3(x, y + 1, z));
						vertices.Add(new Vector3(x, y + 1, z + 1));
						vertices.Add(new Vector3(x + 1, y + 1, z + 1));
						vertices.Add(new Vector3(x + 1, y + 1, z));
						// first triangle for the block top
						triangles.Add(vertexIndex);
						triangles.Add(vertexIndex + 1);
						triangles.Add(vertexIndex + 2);
						// second triangle for the block top
						triangles.Add(vertexIndex + 2);
						triangles.Add(vertexIndex + 3);
						triangles.Add(vertexIndex);
						// add UV
						uvs.Add(new Vector2 (0.125f, 0.0f));
						uvs.Add(new Vector2 (0.25f, 0.0f));
						uvs.Add(new Vector2 (0.25f, 0.125f));
						uvs.Add(new Vector2 (0.125f, 0.125f));

					}
					// Bottom is Done //

					if (block.blockType == 1 && bottom == 0)
					{
						vertexIndex = vertices.Count;
						vertices.Add(new Vector3(x, y, z));
						vertices.Add(new Vector3(x + 1, y, z));
						vertices.Add(new Vector3(x + 1, y, z + 1));
						vertices.Add(new Vector3(x, y , z + 1));

						triangles.Add(vertexIndex);
						triangles.Add(vertexIndex + 1);
						triangles.Add(vertexIndex + 2);

						triangles.Add(vertexIndex + 2);
						triangles.Add(vertexIndex + 3);
						triangles.Add(vertexIndex);
						// add UV
						uvs.Add(new Vector2 (0.25f, 0.0f));
						uvs.Add(new Vector2 (0.375f, 0.0f));
						uvs.Add(new Vector2 (0.375f, 0.125f));
						uvs.Add(new Vector2 (0.25f, 0.125f));

					}

					// North Block faces Away //

					if (block.blockType == 1 && north == 0)
					{
						vertexIndex = vertices.Count;
						vertices.Add(new Vector3(x, y, z + 1));
						vertices.Add(new Vector3(x + 1, y, z + 1));
						vertices.Add(new Vector3(x + 1, y + 1, z + 1));
						vertices.Add(new Vector3(x, y + 1 , z + 1));

						triangles.Add(vertexIndex);
						triangles.Add(vertexIndex + 1);
						triangles.Add(vertexIndex + 2);

						triangles.Add(vertexIndex + 2);
						triangles.Add(vertexIndex + 3);
						triangles.Add(vertexIndex);
						// add UV
						uvs.Add(new Vector2 (0.75f, 0.0f));
						uvs.Add(new Vector2 (0.625f, 0.0f));
						uvs.Add(new Vector2 (0.625f, 0.125f));
						uvs.Add(new Vector2 (0.75f, 0.125f));
					}

					// South block faces Player

					if (block.blockType == 1 && south == 0)
					{
						vertexIndex = vertices.Count;
						vertices.Add(new Vector3(x, y, z));
						vertices.Add(new Vector3(x, y + 1, z));
						vertices.Add(new Vector3(x + 1, y + 1, z));
						vertices.Add(new Vector3(x + 1, y , z));

						triangles.Add(vertexIndex);
						triangles.Add(vertexIndex + 1);
						triangles.Add(vertexIndex + 2);

						triangles.Add(vertexIndex + 2);
						triangles.Add(vertexIndex + 3);
						triangles.Add(vertexIndex);
						// add UV
						uvs.Add(new Vector2 (0.0f, 0.0f));
						uvs.Add(new Vector2 (0.125f, 0.0f));
						uvs.Add(new Vector2 (0.125f, 0.125f));
						uvs.Add(new Vector2 (0.0f, 0.125f));
					}

					if (block.blockType == 1 && east == 0)
					{
						vertexIndex = vertices.Count;
						vertices.Add(new Vector3(x + 1, y, z));
						vertices.Add(new Vector3(x + 1, y + 1, z));
						vertices.Add(new Vector3(x + 1, y + 1, z + 1));
						vertices.Add(new Vector3(x + 1, y , z + 1));

						triangles.Add(vertexIndex);
						triangles.Add(vertexIndex + 1);
						triangles.Add(vertexIndex + 2);

						triangles.Add(vertexIndex + 2);
						triangles.Add(vertexIndex + 3);
						triangles.Add(vertexIndex);
						// add UV
						uvs.Add(new Vector2 (0.25f, 0.0f));
						uvs.Add(new Vector2 (0.375f, 0.0f));
						uvs.Add(new Vector2 (0.375f, 0.125f));
						uvs.Add(new Vector2 (0.25f, 0.125f));
					}

					if (block.blockType == 1 && west == 0)
					{
						vertexIndex = vertices.Count;
						vertices.Add(new Vector3(x, y, z + 1));
						vertices.Add(new Vector3(x, y + 1, z + 1));
						vertices.Add(new Vector3(x, y + 1, z));
						vertices.Add(new Vector3(x, y , z));

						triangles.Add(vertexIndex);
						triangles.Add(vertexIndex + 1);
						triangles.Add(vertexIndex + 2);

						triangles.Add(vertexIndex + 2);
						triangles.Add(vertexIndex + 3);
						triangles.Add(vertexIndex);
						// add UV
						uvs.Add(new Vector2 (0.375f, 0.0f));
						uvs.Add(new Vector2 (0.50f, 0.0f));
						uvs.Add(new Vector2 (0.50f, 0.125f));
						uvs.Add(new Vector2 (0.375f, 0.125f));
					}
				}
			}
		}

		// End Loop //

		mesh = meshFilter.mesh;
		mesh.vertices = vertices.ToArray();
		mesh.triangles = triangles.ToArray();
		mesh.uv = uvs.ToArray();

		mesh.RecalculateNormals();

		meshCollider.sharedMesh = null;
		meshCollider.sharedMesh = mesh;


		gameObject.renderer.material.mainTexture = basicTexture;

	}


}