Delaunay Tetrahedrizations Algorithms Based on the B-rep Model Boundary Constraint

To make the solid based on B-rep modal tetrahedrization,the key problems making mesh are studied.The strategy of constrainting the solid`s bounary while making mesh is puted forward with respect to the topological relationships of the data structure in the B-rep Modal,.In order to get right elements,the validity of space containing the nodes is judged.By way of buliding the topological relationships between the faces and the vertexes,the face-normal method that points out whether a tetrahedron is in the solid and the nodes generation algorithm on the tetrahedrons are proposed.In process of tetrahedrizations of the B-rep modal_based 3D solid,the methods are realized using Delaunay point by point insertion and the examples are offered.