public Vector3 Collision(Model model, float angle, Vector3 posi, string mesh)
        {
            model.Meshes[mesh].VertexBuffer.GetData<Vector3>(vertex);
            this.posi = posi;

            this.posi.Y = CheckVertex();
            return this.posi;
        }

        private float CheckVertex()
        {
            int count2 = 0;
            for (int count = 0; count < vertex.Length; count++)
            {
                if (count > 0)
                {
                    for (count2 = 0; count2 < 3; count2++)
                    {
                        if (four[count2] == Vector3.Zero)
                            four[count2] = vertex[count];
                        else
                            if (Math.Abs(Math.Sqrt((Math.Pow((vertex[count].X - posi.X), 2) + Math.Pow((vertex[count].Z - posi.Z), 2)))) <= 
                            Math.Abs(Math.Sqrt((Math.Pow((four[count2].X - posi.X), 2) + Math.Pow((four[count2].Z - posi.Z), 2)))))
                            {
                                    four[count2] = vertex[count];
                                    count2 = 3;
                            }
                        }
                    }
                else
                    four[0] = vertex[0];
                count2 = 0;
            }

            inter = Intersect();
            return 2; 
        }