Generation of a circle mesh (Unity)

GenerateCircleMesh.cs

private const int CircleSegmentCount = 64;
private const int CircleVertexCount = CircleSegmentCount + 2;
private const int CircleIndexCount = CircleSegmentCount * 3;

private static Mesh GenerateCircleMesh()
{
    var circle = new Mesh();
    var vertices = new List<Vector3>(CircleVertexCount);
    var indices = new int[CircleIndexCount];
    var segmentWidth = Mathf.PI * 2f / CircleSegmentCount;
    var angle = 0f;
    vertices.Add(Vector3.zero);
    for (int i = 1; i < CircleVertexCount; ++i)
    {
        vertices.Add(new Vector3(Mathf.Cos(angle), 0f, Mathf.Sin(angle)));
        angle -= segmentWidth;
        if (i > 1)
        {
            var j = (i - 2) * 3;
            indices[j + 0] = 0;
            indices[j + 1] = i - 1;
            indices[j + 2] = i;
        }
    }
    circle.SetVertices(vertices);
    circle.SetIndices(indices, MeshTopology.Triangles, 0);
    circle.RecalculateBounds();
    return circle;
}