Torus knot of type (15,17).
This chapter shows how to use the FriCAS graphics facilities graphics under the X Window System. FriCAS has two-dimensional and three-dimensional drawing and rendering packages that allow the drawing, coloring, transforming, mapping, clipping, and combining of graphic output from FriCAS computations. This facility is particularly useful for investigating problems in areas such as topology. The graphics package is capable of plotting functions of one or more variables or plotting parametric surfaces and curves. Various coordinate systems are also available, such as polar and spherical.
A graph is displayed in a viewport window and it has a viewport control-panel that uses interactive mouse commands. PostScript and other output forms are available so that FriCAS PostScript images can be printed or used by other programs.