MeshData

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

public class MeshData
{
    public List<Vector3> vertices = new List<Vector3> ();
    public List<int> triangles = new List<int> ();
    public List<Vector2> uv = new List<Vector2> ();

    public List<Vector3> colVertices = new List<Vector3> ();
    public List<int> colTriangles = new List<int> ();

    public bool useRenderDataForCol;

    public MeshData ()
    {
    }

    public void AddQuadTriangles ()
    {
        triangles.Add (vertices.Count - 4);
        triangles.Add (vertices.Count - 3);
        triangles.Add (vertices.Count - 2);

        triangles.Add (vertices.Count - 4);
        triangles.Add (vertices.Count - 2);
        triangles.Add (vertices.Count - 1);

        if (useRenderDataForCol) {
            colTriangles.Add (colVertices.Count - 4);
            colTriangles.Add (colVertices.Count - 3);
            colTriangles.Add (colVertices.Count - 2);
            colTriangles.Add (colVertices.Count - 4);
            colTriangles.Add (colVertices.Count - 2);
            colTriangles.Add (colVertices.Count - 1);
        }
    }

    public void AddVertex (Vector3 vertex)
    {
        vertices.Add (vertex);

        if (useRenderDataForCol) {
            colVertices.Add (vertex);
        }

    }

    public void AddTriangle (int tri)
    {
        triangles.Add (tri);

        if (useRenderDataForCol) {
            colTriangles.Add (tri - (vertices.Count - colVertices.Count));
        }
    }

}