Scientific and Professional Journal of the Croatian Society for Geometry and Graphics

Original Scientific Papers 
Maria Kmetévá, Marta Szilvási-Nagy: Sphere Covering by Rational Quadratic Beziér Patches 
Daniela Velichová: Geometric Modelling of Hyperpatchess 
Gloria Bitterfeld: Synthesis of Grassmann Chain Mechanisms in the Plane Using the Ausdehnungslehre and Mathematica 
Zvonko Čerin: Triangles from Central Points 
Ivanka Babić, Branko Kučinić: Hyperbolic Perspective I 
Jelana Beban - Brkić: On the Focal Curve of Conic Pencils in I2 

Professional Papers 
Miljenko Lapaine: Computer-Aided Graphical Representation of Conic Section Pencils 
Dagmar Szarková: Computer Aided Calculation of Characteristics Points of Some Envelope Helical Surfaces 
Daniela Richtáriková: 3D Polyhedra Scenes and the Triangulation 
Sonja Gorjanc: Generation of Five Types of Ruled Quartics 

Geometry and Graphics 
Vlasta Szirovicza: AutoCAD in Constructive Geometry 

News, Reports, Contributions

5 
9 
 
15 
23 
29 
35 
 

43 
 
49 
53 
57 

68 

70