基于双贝赛尔曲线定位的树木枝干可视化建模

VISUAL MODELING FOR BRANCH AND TRUNK OF TREES BASED ON TWIN BEZIER CURVE LOCATION

树木枝干是虚拟景观中的重要组成部分,对其进行可视化建模意义重大。贝赛尔曲线是一种很好的曲线拟和工具,交互性强,适合树木枝干建模。采用两条贝赛尔曲线分别表示树木枝干的准线和母线,通过充分地人机交互构建树木轮廓结构,然后采用灵活可调的纹理分割及合成技术进行表面贴图,实现树木枝干三维重建。建模结果表明,该方法易于树木枝干形态的交互设计,在一定程度上可以表现其不规则性,通过交互式纹理绑定达到一定程度的真实感,有一定的研究和应用价值。

Branch and trunk of trees are important compositions of virtual sight. So visual modeling for that is very important. Bezier curve is a good curve fitting tool with preferable interactive performance, which adapts to construct branch and trunk of trees. Firstly, two Bezier curves are used to represent the directrix and generatrix of branch and trunk of trees respectively. Secondly, the outline structure of trees is designed via fully human-computer interaction. Thirdly ,the flexible and adjustable texture segmentation and synthesis technology are applied to map surfacely. The three-dimensional reconstruction for branch and trunk of trees is finished finally. The result of modeling proves that this method that is able to manifest the irregularity of trees to some extent is prone to interactive design of shape of branch and trunk of trees. The third dimension can be represented by interactive texture binding. This modeling method has some value in research and application.