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Item XGKS - A Multitask Implementation of GKS(The Eurographics Association, 1983) Herman, I.; T.Tolnay-Knefely,; Vincze, A.; P.J.W. ten HagenA multitask design for GKS is presented, a realization aiming small computers and intelligent graphic hardware.Item A General Device Driver for GKS(Blackwell Publishing Ltd and the Eurographics Association, 1985) Herman, I.; Reviczky, J.A method for generating new device drivers for use in a full GKS implementation is presented. The method is based on conditional compiling techniques making use of the Workstation Description Table, and it has been used in a full GKS to develop several device drivers, which took about 1 week for a novice.Item Some Remarks on the Modelling Gip Problem(Blackwell Publishing Ltd and the Eurographics Association, 1988) Herman, I.; Reviczky, J.The modelling clip as proposed for example in PHIGS is mathematically analyzed and a method to perform it is proposed. The method has the particular edvantage of avoiding all possible singularities appearing in the course of a projective transformation. Additionally, further optimizations in the implementation of the whole output pipeline are proposed.