![]() The Edge table is used to store the edge information of polygon. As shown in the following figure, there are five vertices, from v 1 to v 5.Įach vertex stores x, y, and z coordinate information which is represented in the table as v 1: x 1, y 1, z 1. In this method, the surface is specified by the set of vertex coordinates and associated attributes. ![]() Then realistic scenes are produced by interpolating shading patterns across polygon surface to illuminate. ![]() The polygon surfaces are common in design and solid-modeling applications, since their wireframe display can be done quickly to give general indication of surface structure. This simplifies and speeds up the surface rendering and display of object since all surfaces can be described with linear equations. Set of polygons are stored for object description. The most commonly used boundary representation for a 3D graphics object is a set of surface polygons that enclose the object interior. Space–partitioning representations − It is used to describe interior properties, by partitioning the spatial region containing an object into a set of small, non-overlapping, contiguous solids (usually cubes). 3D object representation is divided into two categories.īoundary Representations (B-reps) − It describes a 3D object as a set of surfaces that separates the object interior from the environment. Objects are represented as a collection of surfaces.
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