说明：  A robust visualization method for reconstruct in surfaces from 3D scattered points with normals is proposed. The method is based on both the Delaunay tetrahedralization and the implicit function.The method enable storeduce total computational costs of the surface visualization by using the Delaunay tetrahedralization mainly. Even if some unexpected face sare generated in a result of the Delaunay tetrahedralization,the method can modify the result by using an implicit function.