Computer Graphics ... "...A 3D computer scanner can locate a point on an object in 3D space. However, there is a certain level of imperfection in the scanning process so that tiny errors are made in locating each point ..."
Discrete Geometry ... "... Discrete surfaces see the world in terms of specific bits of data. If we increase the number of edges in the polygon, we create more angles. At each of these points, the perpendicular arrow sweeps out a smaller angle ..."