Study And Realization Geometric Modeling Of 3D Packaging CAD System

For packaging CAD system would become more and more perfecting, what this subject was studied emphatically was the realization of packaging CAD system three-dimensional function. Analysed the present domestic packaging CAD softwares, could find out that packaging CAD system that lacks its own geometric modeling technology. And geometric modeling technology is foundation and core of CAD. In consult other fields made achievements in geometric modeling technology , made preliminary discussion to geometric modeling technology of three-dimension packaging CAD system.. The entity shows in the modeling technology of geometry that the data structures adopted is very important. Express different stages when in according to the entity, this text proposed 3 form structures in input stage ,.Do while assembling operation in the entity, the data structure adopted was octrees data structures. Octrees algorithms were focal point of the subject. Now summaried finished work as follows:1 . finished entity input adopting three form structures;2. overall introduction the principle, code and application in other respects of octrees algorithms,;3 . introduction basic thoughts when entity did assembling operation adopting octreesdata strcutures,.Regarded this thought as and guided and write out the concretealgorithm.Under Windows98 operating system, regard VisualC + +6.0 as developing platform realized protruding three-dimensional modeling and combine the functions, such as operation,etc. of body finally.