UnityPlatformer.Collider2DRenderer.Update C# (CSharp) Method

    void Update() {
      #if UNITY_EDITOR
      OnValidate();
      #endif

      Mesh mesh = new Mesh();

      PolygonCollider2D _polygon2d = gameObject.GetComponent<PolygonCollider2D>();
      BoxCollider2D _box2d = gameObject.GetComponent<BoxCollider2D>();
      CircleCollider2D _circle2d = gameObject.GetComponent<CircleCollider2D>();
      EdgeCollider2D _edge2d = gameObject.GetComponent<EdgeCollider2D>();

      if (_polygon2d) {
        // points are alredy rotated :)
        int pointCount = _polygon2d.GetTotalPointCount();
        Vector2[] points = _polygon2d.points;

        Vector3[] vertices = new Vector3[pointCount];
        for (int j = 0; j < pointCount; j++) {
          Vector2 actual = points[j];
          vertices[j] = new Vector3(actual.x, actual.y, 0);
        }
        Triangulator tr = new Triangulator(points);
        int[] triangles = tr.Triangulate();
        mesh.vertices = vertices;
        mesh.triangles = triangles;
      }

      if (_box2d) {
        mesh.vertices = GetBoxCorners(_box2d);
        int[] triangles = {0, 1, 2, 1, 3, 2};
        mesh.triangles = triangles;
      }

      if (_circle2d) {
        float scale = 1f / 16f;

        Vector3[] vertices = new Vector3[16];
        Vector2[] points = new Vector2[16];
        for (int j = 0; j < 16; j++) {
          float x = (_circle2d.offset.x +
                     Mathf.Cos(scale * j * 2 * Mathf.PI) * _circle2d.radius) *
                    _circle2d.transform.localScale.x;
          float y = (_circle2d.offset.y +
                     Mathf.Sin(scale * j * 2 * Mathf.PI) * _circle2d.radius) *
                    _circle2d.transform.localScale.y;
          points[j] = new Vector2(x, y);
          vertices[j] = new Vector3(x, y, 0);
        }
        Triangulator tr = new Triangulator(points);
        int[] triangles = tr.Triangulate();
        mesh.vertices = vertices;
        mesh.triangles = triangles;
      }

      if (_edge2d) {
        Debug.LogWarning("EdgeCollider2D is not supported");
      }

      _mf.mesh = mesh;
    }