The paper also analyses the characters of the 3D graphics standards --GKS-3D and PHIGS, compares the difference between thdm.It puts forward a preliminary plan for the unity of GKS-3D and PHIGS.

• 本文还分析了GKS-3D和PHIGS这两个三维图形标准 的特点，对比了这两个标准的共异性，并针对这二者相容性差的问题 ，提出了解决的初步方案。