基于平面几何图形的立体浮雕建模技术

3D relief modeling based on plane geometry graphics

针对具有复杂曲面的艺术类浮雕建模问题,提出一种基于平面几何图形的解决方案。首先由二维区域和截面形状定义出浮雕曲面,浮雕则采用Z-MAP栅格在计算机内离散表示;然后把多个浮雕曲面通过六种可选方式融合成具有复杂外形的立体浮雕。为提高建模效率,给出一种针对二维区域内Z-MAP栅格点的快速遍历算法。最后通过多个应用实例,验证了上述技术方案。

Based on plane geometry graphics,an approach on modeling artistic relief with complex surface is presented.Firstly,the definition of relief surface is deduced based on 2D region and section curve.And a relief model is represented by Z-MAP data structure in computer’s main memory.Then,relief surfaces are merged together to form an artistic relief via six different merging routines.To improve modeling efficiency,a fast traversal algorithm visiting all the Z-MAP points inside a 2D region is put forward.Finally,practical examples are given to validate the approach.