Feedback Create triangle index with a for loop

I want to share a script for creating a triangle index for clockwise sorted vertices in a convex polygon.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Octagon : MonoBehaviour
6. {
7.     public List<Vector3> Vertices = new List<Vector3>();
8.  
9.     public List<int> Triangles = new List<int>();
10.  
11.     public List<int> Triangles2 = new List<int>();
12.  
13.     // Start is called before the first frame update
14.     void Start()
15.     {
16.         // The Vertices go around in clockwise order
17.  
18.         Vertices = new List<Vector3>()
19.         {
20.             new Vector3(-2.000000f, 0.000000f, 0.000000f),
21.             new Vector3(0.000000f, 0.000000f, -2.000000f),
22.             new Vector3(2.000000f, 0.000000f, -2.000000f),
23.             new Vector3(4.000000f, 0.000000f, 0.000000f),
24.             new Vector3(4.000000f, 0.000000f, 2.000000f),
25.             new Vector3(2.000000f, 0.000000f, 4.000000f),
26.             new Vector3(0.000000f, 0.000000f, 4.000000f),
27.             new Vector3(-2.000000f, 0.000000f, 2.000000f)
28.         };
29.  
30.         // Repeating pattern in Triangles
31.  
32.         Triangles = new List<int>()
33.         {
34.             0, 7, 1,
35.             1, 7, 6,
36.             1, 6, 2,
37.             2, 6, 5,
38.             2, 5, 3,
39.             3, 5, 4,
40.         };
41.  
42.         // Create triangle index
43.  
44.         int r = 0;
45.  
46.         int i = 0;
47.  
48.         int h = 1;
49.  
50.         for (int e = 0; e < Vertices.Count - 2; e++)
51.         {
52.             int t1 = r;
53.             i++;
54.             int t2 = Vertices.Count - h;
55.             r++;
56.             if (i % 2 == 0)
57.             {
58.                 r--;
59.                 h++;
60.             }
61.             i++;
62.             int t3 = i % 2 == 0 ? r : Vertices.Count - h;
63.             i++;
64.  
65.             Triangles2.Add(t1);
66.             Triangles2.Add(t2);
67.             Triangles2.Add(t3);
68.         }
69.  
70.         GameObject OctagonMesh = new GameObject("Mesh");
71.  
72.         OctagonMesh.AddComponent<MeshFilter>();
73.         OctagonMesh.AddComponent<MeshRenderer>();
74.  
75.         Renderer OctagonRend = OctagonMesh.GetComponent<Renderer>();
76.         OctagonRend.material = new Material(Shader.Find("Standard"));
77.  
78.         Mesh mesh = OctagonMesh.GetComponent<MeshFilter>().mesh;
79.  
80.         mesh.SetVertices(Vertices);
81.         mesh.SetTriangles(Triangles2, 0, true);
82.  
83.         mesh.RecalculateNormals();
84.     }
85.  
86.     // Update is called once per frame
87.     void Update()
88.     {
89.  
90.     }
91. }
92.  

This other script has a different repeating pattern.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Octagon2 : MonoBehaviour
6. {
7.     public List<Vector3> Vertices = new List<Vector3>();
8.  
9.     public List<int> Triangles = new List<int>();
10.  
11.     public List<int> Triangles2 = new List<int>();
12.  
13.     // Start is called before the first frame update
14.     void Start()
15.     {
16.         // The Vertices go around in clockwise order
17.  
18.         Vertices = new List<Vector3>()
19.         {
20.             new Vector3(-2.000000f, 0.000000f, 0.000000f),
21.             new Vector3(0.000000f, 0.000000f, -2.000000f),
22.             new Vector3(2.000000f, 0.000000f, -2.000000f),
23.             new Vector3(4.000000f, 0.000000f, 0.000000f),
24.             new Vector3(4.000000f, 0.000000f, 2.000000f),
25.             new Vector3(2.000000f, 0.000000f, 4.000000f),
26.             new Vector3(0.000000f, 0.000000f, 4.000000f),
27.             new Vector3(-2.000000f, 0.000000f, 2.000000f)
28.         };
29.  
30.         // Repeating pattern in Triangles
31.  
32.         Triangles = new List<int>()
33.         {
34.             0, 2, 1,
35.             0, 3, 2,
36.             0, 4, 3,
37.             0, 5, 4,
38.             0, 6, 5,
39.             0, 7, 6,
40.         };
41.  
42.         // Create triangle index
43.  
44.         for (int e = 0; e < Vertices.Count - 2; e++)
45.         {
46.             int t1 = 0;
47.             int t2 = e + 2;
48.             int t3 = e + 1;
49.          
50.             Triangles2.Add(t1);
51.             Triangles2.Add(t2);
52.             Triangles2.Add(t3);
53.         }
54.  
55.         GameObject OctagonMesh = new GameObject("Mesh");
56.  
57.         OctagonMesh.AddComponent<MeshFilter>();
58.         OctagonMesh.AddComponent<MeshRenderer>();
59.  
60.         Renderer OctagonRend = OctagonMesh.GetComponent<Renderer>();
61.         OctagonRend.material = new Material(Shader.Find("Standard"));
62.  
63.         Mesh mesh = OctagonMesh.GetComponent<MeshFilter>().mesh;
64.  
65.         mesh.SetVertices(Vertices);
66.         mesh.SetTriangles(Triangles2, 0, true);
67.  
68.         mesh.RecalculateNormals();
69.     }
70.  
71.     // Update is called once per frame
72.     void Update()
73.     {
74.  
75.     }
76. }
77.