| 摘要 |
<p>Method and device for designing a three-dimensional surface (10), comprising the following steps: a) defining an initial surface by forming a topological model of the three-dimensional surface, represented by means of half-edge boundary modelling of boundary elements (facet (13), closed loop (16), edge (22), half-edge (19) and vertex (25)), b) presenting the three-dimensional surface (10) to the user and c) modifying the three-dimensional surface (10), wherein in step a) the representation of the topological model further comprises the data structures line (28), which describes a sequence of edges (22), curve (35) and plane (30), which form the geometrical description of an edge (22), or, respectively, a facet (13). <IMAGE></p> |
