These include vertices, edges, faces, polygons and surfaces. Photoshop provides an array of shape tools including rectangles, rounded rectangles, ellipses, polygons and lines. In rendering of 3D models, triangles and polygons in space might be primitives. Simpler algorithms are possible for monotone polygons, star-shaped polygons, convex polygons and triangles. DDAs are used for rasterization of lines, triangles and polygons. The shapefile format stores the data as primitive geometric shapes like points, lines, and polygons. Many polyhedra call for unalike adjacent polygons. These are the analogues to polygons and polyhedra in spaces with more dimensions. All of the characters were constructed using geometric polygons. Packing densities of concave shapes such as star polygons can be arbitrarily small. These tiles may be polygons or any other shapes. The ground is decorated with objects that are modeled using texture-mapped polygons. The case for other primitive shapes like lines and polygons is similar. The faces project onto regular spherical polygons which exactly cover the sphere. These are overlaps or gaps at joints between polygons.