PHIGS

PHIGS ( Programmer's Hierarchical Interactive Graphics System ) is the ISO standard (ISO / IEC 9592 ) for 3D computer graphics, which was adopted in 1988.

PHIGS defines an Application Programming Interface that allows the hierarchical structure of the displayed 3D scene is described. As such it is an example of a scene graph API. PHIGS supports, among other points, lines with different line widths and filled polygons, arbitrary affine transformations, perspective view of text and user-defined clipping planes.

PHIGS contains no functionality to illuminate graphical objects. Therefore, in 1992 the successor PHIGS standardized, the additional integrated the Phong lighting model. Furthermore, can be used with PHIGS , more complex graphical primitives such as NURBS.

PHIGS lost with the proliferation of OpenGL in importance and is no longer used today for new developments.