面向可变形体的直觉化交互技术研究
发布时间：2019-07-04 20:26
【摘要】：近几年来,虚拟现实技术发展迅速并已应用于各行各业。虚拟装配技术(Virtual Assembly)技术是虚拟现实技术在传统制造业的典型应用。传统的虚拟装配技术需要设计人员在虚拟装配系统和三维建模软件中反复导入和修改模型。如果能够在装配过程中,让模型自己进行外形或者参数的修正,而且用户也可以根据自己的想法“亲手”参与外观的设计,这将大大缩短产品设计周期,提高生产效率,而且能够给用户带来直觉化的交互体验。这对于提高我国制造业水平具有十分重要的意义。本文的研究内容就是虚拟装配过程中零件的变形技术。本文在分析现有的三维物体变形技术的基础上,提出了适用于虚拟装配的基于加权平均法线的变形方法。该方法通过改变网格模型表面的顶点位置来实现三维物体的变形,在变形过程中使用加权平均法线来确定网格顶点的位移方向,使变形效果更加真实,并且使用高斯分布函数来计算各网格顶点的移动变化因子,使变形效果更加光滑。最后,本文基于Unity3D和Leap Motion开发了一个直觉化交互系统,以验证该方法的有效性。通过直觉化交互系统中的六个场景及实验的验证,发现该方法实现简单,计算速度快,能满足实时变形的要求,而且有良好的变形效果,并为进一步研究虚拟装配建模技术奠定了理论基础。
文内图片：
图片说明：基于物理属性的软体手模型I}l
[Abstract]:In recent years, virtual reality technology has developed rapidly and has been applied to all walks of life. Virtual Assembly technology is a typical application of virtual reality technology in the traditional manufacturing industry. The traditional virtual assembly technology requires the designer to repeatedly import and modify the model in the virtual assembly system and the three-dimensional modeling software. if the model can be modified by the shape or the parameter in the assembling process, and the user can participate in the design of the appearance according to the own idea "hand", the product design period can be greatly shortened, the production efficiency is improved, But also can bring an intuitive interactive experience to the user. This is of great significance to improve the manufacturing level of our country. The research content of this paper is the deformation technology of parts during the process of virtual assembly. Based on the analysis of the existing three-dimensional object deformation technology, this paper presents a method of deformation based on weighted average normal for virtual assembly. The method realizes the deformation of the three-dimensional object by changing the vertex position of the surface of the mesh model, And a Gaussian distribution function is used to calculate the movement change factors of each mesh vertex, so that the deformation effect is more smooth. Finally, this paper develops an intuitive interaction system based on Unity3D and Leap Motion to verify the effectiveness of the method. Through the verification of six scenes and experiments in the intuitive interaction system, it is found that the method is simple, the calculation speed is fast, the requirement of real-time deformation can be met, and the deformation effect is good, and the theoretical foundation is laid for further research of the virtual assembly modeling technology.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.9
文内图片：
图片说明：基于物理属性的软体手模型I}l
[Abstract]:In recent years, virtual reality technology has developed rapidly and has been applied to all walks of life. Virtual Assembly technology is a typical application of virtual reality technology in the traditional manufacturing industry. The traditional virtual assembly technology requires the designer to repeatedly import and modify the model in the virtual assembly system and the three-dimensional modeling software. if the model can be modified by the shape or the parameter in the assembling process, and the user can participate in the design of the appearance according to the own idea "hand", the product design period can be greatly shortened, the production efficiency is improved, But also can bring an intuitive interactive experience to the user. This is of great significance to improve the manufacturing level of our country. The research content of this paper is the deformation technology of parts during the process of virtual assembly. Based on the analysis of the existing three-dimensional object deformation technology, this paper presents a method of deformation based on weighted average normal for virtual assembly. The method realizes the deformation of the three-dimensional object by changing the vertex position of the surface of the mesh model, And a Gaussian distribution function is used to calculate the movement change factors of each mesh vertex, so that the deformation effect is more smooth. Finally, this paper develops an intuitive interaction system based on Unity3D and Leap Motion to verify the effectiveness of the method. Through the verification of six scenes and experiments in the intuitive interaction system, it is found that the method is simple, the calculation speed is fast, the requirement of real-time deformation can be met, and the deformation effect is good, and the theoretical foundation is laid for further research of the virtual assembly modeling technology.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.9
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