关键词: 场向参数化, 阵列, 重用, 网格曲面, 自由形状特征, 交互设计

Abstract: Aiming at improving the efficiency of freeform features design on mesh and optimizing subsequent layout design more easily,a parameter-driven pattern design method for freeform features on surface was proposed.The field-aligned parameterization method was introduced to determine the location of the features by intersecting two iso-lines on mesh with different angles,and the local coordinate frame for each feature was established through the normal and the vector of pattern location to determine its orientation.Moreover,the size of each feature could be determined interactively.The features were deformed to match the target mesh by Laplacian deformation based on linear rotation-invariant coordinates,which made the features and target mesh connect smoothly and naturally,and achieved the orderly multiple replication of freeform features.By handling the feature pattern and deformation separately,it was not only easy to ensure the result of mixing features with target mesh,but also reduce the cost of time to make parallel computation possible.The experimental results showed that our method was robust,effective,and could meet the requirements of interactive pattern design of freeform features on surface.

Key words: field-aligned parameterization, pattern, reuse, mesh surface, free form features, interactive pattern design