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

[ExecuteInEditMode]
[RequireComponent(typeof(MeshRenderer))]
[RequireComponent(typeof(MeshFilter))]
public class TriangleMesh : MonoBehaviour {

    private MeshFilter meshFilter;

    private Mesh mesh = null;

    private Vector3[] vertices = new Vector3[15];
    private Color[] colors = new Color[15];
    private Vector3[] normals = new Vector3[15];
    private Vector2[] uv = new Vector2[15];
    private int[] triangles = new int[39];

    private float blinkRate = 0.5f;

    public float alpha = 0.8f;

	void Start () {

	}

	void Update () {
        meshFilter = GetComponent<MeshFilter>();
        if(mesh==null)
        {
            mesh = new Mesh();
        }

                // top
        vertices[0] = new Vector3(1.5f, 6);
        vertices[1] = new Vector3(1, 5);
        vertices[2] = new Vector3(2, 5);
        vertices[3] = new Vector3(1, 4);
        vertices[4] = new Vector3(2, 4);
        vertices[5] = new Vector3(1, 3);
        vertices[6] = new Vector3(2, 3);
        vertices[7] = new Vector3(1, 2);
        vertices[8] = new Vector3(2, 2);
        vertices[9] = new Vector3(1, 1);
        vertices[10] = new Vector3(2, 1);
        vertices[11] = new Vector3(3, 1);

        // bottom right point
        vertices[12] = new Vector3(3, 0);
        vertices[13] = new Vector3(0, 1);

        // bottom left point
        vertices[14] = new Vector3(0, 0);

        /*
        uvs[0] = new Vector2(0, 0);
        uvs[1] = new Vector2(1, 0.5f);
        uvs[2] = new Vector2(0.5f, 0.15f);
        */
        normals[0] = new Vector3(0,1,0);
        normals[1] = new Vector3(0,1,0);
        normals[2] = new Vector3(0,1,0);
        normals[3] = new Vector3(0,1,0);
        normals[4] = new Vector3(0,1,0);
        normals[5] = new Vector3(0,1,0);
        normals[6] = new Vector3(0,1,0);
        normals[7] = new Vector3(0,1,0);
        normals[8] = new Vector3(0,1,0);
        normals[9] = new Vector3(0,1,0);
        normals[10] = new Vector3(0,1,0);
        normals[11] = new Vector3(0,1,0);
        normals[12] = new Vector3(0,0,1);
        normals[13] = new Vector3(0,1,0);
        normals[14] = new Vector3(0,0,1);


        float col = Mathf.Cos(Time.time);

        colors[0] = Color.blue;
        colors[1] = Color.blue;
        colors[2] = Color.blue;
        colors[3] = Color.blue;
        colors[4] = Color.blue;
        colors[5] = Color.blue;
        colors[6] = Color.blue;
        colors[7] = Color.blue;
        colors[8] = Color.blue;
        colors[9] = Color.blue;
        colors[10] = Color.blue;
        colors[11] = new Color(0, col, 1 - col);
        colors[12] = Color.blue;
        colors[13] = new Color(col, 0, 1 - col);
        colors[14] = Color.blue;
        
       colors[0].a = alpha;
        

         // top
        triangles[0] = 1;
        triangles[1] = 2;
        triangles[2] = 0;

        triangles[3] = 1;
        triangles[4] = 4;
        triangles[5] = 2;

        triangles[6] = 1;
        triangles[7] = 3;
        triangles[8] = 4;

        triangles[9] = 3;
        triangles[10] = 5;
        triangles[11] = 4;

        triangles[12] = 5;
        triangles[13] = 6;
        triangles[14] = 4;

        triangles[15] = 5;
        triangles[16] = 8;
        triangles[17] = 6;

        triangles[18] = 5;
        triangles[19] = 7;
        triangles[20] = 8;

        triangles[21] = 7;
        triangles[22] = 9;
        triangles[23] = 8;

        triangles[24] = 9;
        triangles[25] = 10;
        triangles[26] = 8;

        triangles[27] = 13;
        triangles[28] = 9;
        triangles[29] = 7;

        triangles[30] = 13;
        triangles[31] = 14;
        triangles[32] = 9;

        triangles[33] = 8;
        triangles[34] = 10;
        triangles[35] = 11;

        triangles[36] = 10;
        triangles[37] = 12;
        triangles[38] = 11;
        
  
        vertices[12] += normals[12] * Mathf.Sin(Time.time);  
        vertices[14] += normals[14] * Mathf.Sin(Time.time);
        
        
        mesh.vertices = vertices;
        mesh.colors = colors;
        mesh.normals = normals;
        mesh.uv = uv;
        mesh.triangles = triangles;

        meshFilter.sharedMesh = mesh;
    }
}