A three-sided polygon. In 3D graphics, the surfaces of 3D objects are broken down into triangles. Small numbers of triangles are used for flat surfaces, while large numbers are used to mold curved surfaces similar to the way a geodesic dome is constructed. The three points of every triangle (vertices) are computed on an X-Y-Z scale and must be recomputed each time the object is moved. See
triangle setup and
geometry calculations.
Triangles
The smaller the triangle, the more realistic the curve. It takes an enormous number of triangles to simulate totally round objects. (Image courtesy of Intergraph Computer Systems.)