NeGAS: logo based authoring environment for 3D computer animation

There are already many software products to create 3DCG motion pictures. However, their products have complicated user interface to control massive degrees of freedom of manual character control.Authoring operation of 3D computer animation is complex and complicated task, therefore, to remove this bottleneck will increase productivity and speed up trial and error.Turtle metaphor which is conceived with Logo programming language is enhanced to construct animation authoring system with consistent policy. On this enhancement, 3D visual object can be constructed, and these objects can be moved with simple command sequence.According to this concept, O³Logo has been developed. And, A motion picture creation environment - NeGAS (Next Generation Authoring System) has been developed based on O³Logo. Especially, motion planning and editing is important task in computer animation. And, automatic animation generator using agent technology are designed which motion picture authors are helped and assisted to reduce load and time cost.However, intelligent systems are using symbolic rule description, therefore, it is difficult to use for novice. The solution on NeGAS is enhancement of motion flexibility and intelligent human interface which is visualized the invisible effects of rule description.