Yankov K., Object Oriented Two-Dimensional Graphics in a Borland Delphi Environment

In this paper a graphical extension for Borland Delphi is described. Basic geometrical primitives are organized in classes according to the requirements of object-oriented programming. Abstract base class is TMicroGraph, It is an ancestor of all geometrical objects KPoint, KLine, KCircle, KEllipse, KSpline, KWorldStrings, KCartesian_System. Visualization class TWorldPaintBox is introduced to avoid disadvantages of TCanvas. The new component defines display plane in world coordinates and its methods draw the geometrical exemplars. The graphical extension is used to create the programs KORELIA for analysis of dynamics processes, 2D drafting system EUCLID, 3D geometrical modeling system ARCHIMED and system CINDY for kinematic simulation of industrial robots.