心内膜三维几何模型交互式网格切割算法研究

摘要

针对心内膜三维标测系统中心内膜模型网格切割模块，提出一种新的交互式网格切割算法。系统在载入心内膜三维几何模型后初始化切割平板模型，由用户交互移动切割平板和旋转切割平板的法线。借助矩阵变换，针对心内膜三维几何模型实现能反映用户切割意图和保持网格细节特征的网格切割，而且切割平板可以消除锯齿效应。实验对比结果证明，该算法对于心内膜三维几何模型可以实现令用户满意的实时无锯齿交互式网格切割。%For the mesh cutting module of endocardial model in endocardial 3D mapping system,we present a new interactive mesh cutting algorithm.The system initialises the cutting plane model after the 3D endocardial geometric model is loaded,then the cutting plane and the normal line of cutting plane are moved and rotated by the user interactively.With the help of matrix transformation,the mesh cutting which reflects user’s cutting intention while preserves the feature of mesh details is implemented aiming at the 3D endocardial geometric model.Mo-reover,the cutting plane can eliminate the sawtooth effect.Experimental contrasting result shows that this algorithm can achieve real-time non-serrated interactive mesh cutting with user satisfaction for 3D endocardial geometric model.