We introduce a family of trigonometrie polynomials, denoted as Stancu polynomials, which covers as special cases the trigonometrie Lagrange and Bernstein polynomials. This family depends only on one real parameter, denoted as design parameter. Our approach works for curves as well as for surfaces over triangles. The resulting Stancu curves resp. surfaces therefore establish a link between trigonometrie interpolatory and Bernstein-Bézier curves resp. surfaces