基于Cardinal样条曲线的虚拟漫游路径优化

漫游路径不平滑和漫游相机视角方向固定是导致虚拟漫游沉浸感差的主要问题.基于此,提出一种基于Cardinal样条曲线拟合的漫游路径平滑过渡算法,解决漫游中由于漫游路径不平滑造成的视点跳跃问题;提出一种虚拟漫游相机视角方向动态更新算法,实现漫游相机视角方向沿路径方向动态更新,更加符合人们的观察习惯;最后,基于开源场景图形引擎(OpenSceneGraph,OSG)对上述算法进行了实现和实验验证.结果表明,基于所提方法生成的漫游路径平滑、漫游相机视角方向过渡自然,有效提高了漫游的虚拟沉浸感.

Virtual walkthrough path optimization based on Cardinal spline curve

Unsmooth path and uneven changes of perspective direction are main problems that undermine the immersion of virtual walkthrough. Therefore, this paper proposed an algorithm of virtual walkthrough path optimization basedCardinal spline curve to solve the viewpoint jump in the roaming caused by unsmooth path. Meanwhile, this paper put forward an algorithm of perspective direction dynamic update to implement the dynamic update of perspective direction along the path, which was more in line with human observed behavior. Finally, this paper implemented and verified the above algorithms based on the OSG. The results show that virtual navigation path is smooth and perspective direction changes more naturally based on proposed methods, increasing the immersion of virtual walkthrough.