private void rotateTexture(int i, int j, Point a, Point b, Point c, Point d)
{
_board[i][j].verts[0] = new VertexPositionTexture(new Vector3(i, j + size, 0), new Vector2(a.X, a.Y));
_board[i][j].verts[1] = new VertexPositionTexture(new Vector3(i + size, j + size, 0), new Vector2(b.X, b.Y));
_board[i][j].verts[2] = new VertexPositionTexture(new Vector3(i, j, 0), new Vector2(c.X, c.Y));
_board[i][j].verts[3] = new VertexPositionTexture(new Vector3(i + size, j, 0), new Vector2(d.X, d.Y));
}