Box2D.Collision.Shapes.PolygonShape.Validate C# (CSharp) Method

        public bool Validate()
        {
            for (int i = 0; i < VertexCount; ++i)
            {
                int i1 = i;
                int i2 = i < VertexCount - 1 ? i1 + 1 : 0;
                Vec2 p = Vertices[i1];
                Vec2 e = pool1.Set(Vertices[i2]).SubLocal(p);

                for (int j = 0; j < VertexCount; ++j)
                {
                    if (j == i1 || j == i2)
                    {
                        continue;
                    }

                    Vec2 v = pool2.Set(Vertices[j]).SubLocal(p);
                    float c = Vec2.Cross(e, v);
                    if (c < 0.0f)
                    {
                        return false;
                    }
                }
            }

            return true;
        }