为了快速高效地生成最优化的数据模型,流畅逼真地进行水利工程三维场景渲染,在大坝三维可视化建模中使用OSG(Open Scene Graph)程序来开发一种坝区三维模拟及漫游演示系统,该系统的三维渲染将使坝区场景更直观更真实。研究表明:OSG程序...为了快速高效地生成最优化的数据模型,流畅逼真地进行水利工程三维场景渲染,在大坝三维可视化建模中使用OSG(Open Scene Graph)程序来开发一种坝区三维模拟及漫游演示系统,该系统的三维渲染将使坝区场景更直观更真实。研究表明:OSG程序已具备对高性能渲染、海量地形数据库及多通道的支持,OSG平台在坝区三维模拟系统设计中应用前景相当广阔,在坝区三维模拟可视化研究的重要性日益突出。展开更多
To improve the sense of reality on perception, an improved algorithm of 3D shape haptic rendering is put forward based on a finger mounted vibrotactile device. The principle is that the interactive information and the...To improve the sense of reality on perception, an improved algorithm of 3D shape haptic rendering is put forward based on a finger mounted vibrotactile device. The principle is that the interactive information and the shape information are conveyed to users when they touch virtual objects at mobile terminals by attaching the vibrotactile feedback on a fingertip. The extraction of shape characteristics, the interactive information and the mapping of shape in formation of vibration stimulation are key parts of the proposed algorithm to realize the real tactile rendering. The contact status of the interaction process, the height information and local gradient of the touch point are regarded as shape information and used to control the vibration intension, rhythm and distribution of the vibrators. With different contact status and shape information, the vibration pattern can be adjusted in time to imitate the outlines of virtual objects. Finally, the effectiveness of the algorithm is verified by shape perception experiments. The results show that the improved algorithm is effective for 3D shape haptic rendering.展开更多
文摘为了快速高效地生成最优化的数据模型,流畅逼真地进行水利工程三维场景渲染,在大坝三维可视化建模中使用OSG(Open Scene Graph)程序来开发一种坝区三维模拟及漫游演示系统,该系统的三维渲染将使坝区场景更直观更真实。研究表明:OSG程序已具备对高性能渲染、海量地形数据库及多通道的支持,OSG平台在坝区三维模拟系统设计中应用前景相当广阔,在坝区三维模拟可视化研究的重要性日益突出。
基金The National Natural Science Foundation of China(No.61473088)Six Talent Peaks Projects in Jiangsu Province
文摘To improve the sense of reality on perception, an improved algorithm of 3D shape haptic rendering is put forward based on a finger mounted vibrotactile device. The principle is that the interactive information and the shape information are conveyed to users when they touch virtual objects at mobile terminals by attaching the vibrotactile feedback on a fingertip. The extraction of shape characteristics, the interactive information and the mapping of shape in formation of vibration stimulation are key parts of the proposed algorithm to realize the real tactile rendering. The contact status of the interaction process, the height information and local gradient of the touch point are regarded as shape information and used to control the vibration intension, rhythm and distribution of the vibrators. With different contact status and shape information, the vibration pattern can be adjusted in time to imitate the outlines of virtual objects. Finally, the effectiveness of the algorithm is verified by shape perception experiments. The results show that the improved algorithm is effective for 3D shape haptic rendering.
