摘要
针对真实果树进行修剪试验存在不可逆性、成本高、修剪效果难以快速呈现等缺点,将Unity3D虚拟现实技术应用到果树的枝、叶、花等修剪模拟。首先通过三维扫描仪获取果树形态数据;然后三维重建得到模型导入unity创建虚拟果园;利用射线拾取算法鼠标可以拾取果树枝条上设置的修剪点,由修剪规则判断若修剪点选取正确,出现"虚拟剪刀",并利用包围盒层次法进行碰撞检测以修剪动画的方式剪掉拾取对象。以单株柑橘为例,模拟了其某枝条疏花疏果及果实采摘交互修剪过程。实验结果表明,该方法能直观形象地模拟果树修剪过程,符合真实的人工修剪操作,树木真实感较好,对果树修剪的教学和研究有较好的实用价值。
Aiming at the problem of pruning test in real fruit tree are irreversible defects , high cost , and difficult to fast rendering of pruning .A virtual pruning method of fruit tree which based on Unity 3 D virtual reality is proposed .First , fruit morphology data was achieved through three-dimensional scanning , then, using Unity3D to create a virtual orchard , and selecting trim points of the branches by Ray picked algorithm .If selected correctly , according to pruning rules , virtual scissors appeared and pruned objects.Finally , citrus , were as an example , to achieve use of virtual scissors to simulate blossom and fruit thinning and fruit picking .Experiment results show that this method can simulate the visual image of fruit tree pruning process .What’ s more, it is in line with the real operation manual pruning and has a natural tree sense .It has good practical value in teaching and research .
出处
《农机化研究》
北大核心
2015年第4期7-11,35,共6页
Journal of Agricultural Mechanization Research
基金
国家"863计划"项目(2013AA102405)
北京市科技新星计划项目(XX2013022)
北京科技计划项目(Z131100001113035)
关键词
果树修剪
修剪模拟
虚拟现实
可视化
fruit trees pruning
trim simulation
virtual reality
visualization
