A research on integrated process of solid-model-less styling design and analysis using advanced mesh modeling operations

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The purpose of this research is to develop software where legacy mesh models for analysis can be retrieved using a query of a hand written sketch or sampled point data from physical model, where a new mesh model for analysis for a new design idea can be obtained quickly by deforming the legacy models so as to fit to the sketch or sampled points. Therefore, in this research, advanced mesh modeling operations which stand geometric modeling ability similar to conventional solid modeling operations and mesh-generation for analysis were developed. The research results can be summarized as follows. 1) A content based mesh retrieval function from hand-written sketch has been developed where mesh models which have similar projected view to the sketch can be retrieved using generic Fourier descriptor and local binary patterns. 2) A mesh-assembly function has been developed where two complex mesh models in contact can be merged into one model using surface offsetting and edge-collapse operations for tetrahedral mesh. 3) A mesh feature removal function has been developed where the small form features on the mesh model such as holes, slots and bosses can be automatically recognized and these features can be removed or regenerated using our LOD control algorithm. 4) Feature recognition and mesh deforming functions have been developed where partial surface regions on the large scale mesh which can be approximated to a singe kind of analytic surface can be automatically segmented, and where geometry of the mesh can be deformed in the dimension driven way using a special deforming function based on the barycentric coordinate interpolation for mesh. These research results were presented in public in the form of 10 research papers and 2 patent applications.