Study On Web-based 3D Visualization Technology For Mechanical Product

With increasingly market competition, in order to response quckily to market's demand ,and in order to conformity effectively resource , strengthen superiority of competition, distributing cooperated design based on web becomes one of manufacturing study's hotspot. The paper took product 3D model which transformed form IGES format to VRML format as study object, studied deeply collective technology route that implements visualization of product 3D model , technical theory base, key algorithm , and developed a suit of prototype software system.Firstly, the paper put forward a collective technology route that implemented visualization of product 3D model after analyzeing web technique and VRML technique, described generally key technique sections in it.Secondly, the paper studied deeply technical theory base which implemented visualization of product 3D model on web. set forth principle and method of NURBS surface modeling, studied IGES standard that stated geometrical shape by NURBS mathematics means, pared IGES file format, presented method of distilling information of trimmed surface's IGES file, advanced principle and appraisal standard of Triangular segmentation , and discussed currently popular method of Triangular segmentation, etc.Thirdly, the paper studied key algorithm design of implementing visualization of product 3D model on web, which based on above-mentioned study. From simple but important de-boor algorithm, to complicated but key triangular segmentation algorithm, and algorithm which maps form data structure of C++ to VRML's node, etc. Then, the paper put forward method used to Triangular segmentation of trimmed surface by combining the Advancing Front Technique with Mapping Technique, and afforded its special algorithm .Finally, carried through collective design & realization of the applied system. Include selecting collective design scheme, confirming development circumstance, choosing development language, confirming design model and design measure, etc. we have developed successfully a suit of prototype software by VC++6. 0, it was applied into visualization of product 3D model on web. This proved effective correctness of study in practice.