ABSTRACT
Proposed is one method (TRIAN algorithm) of approximation and 3D visualization of bound surfaces of geometrical objects specified in the form of closed volumes with combinatorial method. The peculiarity of the method is in immersion of objects into a grid and formation of surface approximation in the form of triangulation. Then the interactive 3D visualization of models if possible for their analysis and correction. The combinatorial method of geometry specification is applied in codes of numerical simulation by Monte Carlo method and for specification of initial geometry in difference methods. A conventional method of 3D visualization of such type of geometry is rendering.
