Hubl, Josef2014-10-212014-10-2119931467-8659https://doi.org/10.1111/1467-8659.1220159In order to optimize the transformation-clipping-pipeline of PHIGS or GKS-3D it is sometimes necessary to determine whether a plane intersects a perpendicular volume or not. The solution to this problem is not very complicated. This paper offers a more effective procedure that handles this task.10.1111/1467-8659.1220159159-160