关键词: 草绘技术, 网格曲面, 拉伸变形, 拉伸区域, 拉伸轨迹曲线, 曲面光顺

Abstract: To improve the efficiency of 3D model reconstruction in product conceptual design, a sketch-based mesh extruding deformation method was designed. Extruding area was selected in multi-mode interaction way, and mesh model topology in extruding area was adjusted by system adaptively. By using projection method, 2D extruding curve of freeform or non-freeform was transformed into space 3D curve. The boundary curve of extruding area was swept, and the adjacent curves were sewed to form extruding mesh model. The effectiveness and feasibility of this method was verified on the self-developed software platform.

Key words: sketch technology, mesh, extruding deformation, extruding area, extruding curve, surface fairing