关键词: 网格融合, 设计重用, 参数化, 网格变形

Abstract: A modeling method was proposed based on mesh fusion aiming at the problems of having difficulties in reusing complex structural designs in the modeling of parts. Firstly the discrete exponential mapping(DEM) method was used to parameterize the target region of base mesh locally. Secondly the hole filling was conducted on the conditions of boundary of feature mesh by using the least-squares meshes， and then the hole filling mesh was parameterized with DEM to obtain the parameter coordinates and the normals of boundary points of the feature mesh. The boundary of feature mesh was mapped to the target region of base mesh on the base of the parameter coordinates. And the feature mesh was reconstructed with deformations by the layer-based mesh deformation optimization algorithm where the coordinates and normals of the mapped boundary points of the target region were taken as the initial deformation conditions， so that the feature mesh had a better conformality. Then the conformality maybe improved through the correction of the normals of boundary points on the feature mesh to control the expansion or contraction of reconstructed mesh volume. Finally， the feature primitive was extracted from the two meshes according to the normals and the curvatures， and then the geometric constraints were added to control the positions of the feature mesh on the base mesh so as to guarantee the relative position relationship of the two meshes. The experimental results show that the proposed method may be used in the new model design to achieve the reuse of design， which has great convenience， high efficiency and accuracy.

Key words: mesh fusion, design reuse, parameterization, mesh deformation