Design And Implementation Of Intelligent Interaction Techniques For Automatic Geometric Reasoning

Although the traditional(CAD)systems has been very good at generating engineering drawings and 3-D models, then still cannot meet the designer's need in the conceptual design phase, where modifications and selection is quite common. In order to overcome the inconvenience, the CAD system has undergone 4 major technical innovations, since the first proposal of CAD in 1963.Intelligent(Parametric)CAD system is the latest innovation, Automatic Geometry Deduction(in short, AGD)is the core technology of the intelligent CAD system, Automatic Geometry Deduction is to generate drawings automatically by computer, based on desfgn parameters to fit designer's intention. Now, the main methodology of AGD includes: numeric based method, symbol based method, rule base method and graph based method.On traditional graphic user interactive platform, computer resides in a purely passive state, which is "no instruction, no action", so the operating is verbose and dull. Therefore, an important research field in intelligent CAD is to capture the user interaction intelligently, which is to analysis and simulate the designers' ideas and generate guidance on the interaction platform to aid the design. This paper will propose an algorithm on the design and implementation of an intelligent interaction which can:1. Capture or simulate user intentions, guide the user to modify certain constrains while keeping constant constrains unchanged, making the design more flexible and easy to use. And help the designer to fulfill his/her ideas.2. Record the whole design process with predicts, supplying interfaces to automatic deduction module.