应用于移动平台的器官柔性形变仿真方法

Elastic deformation simulation of organs on mobile platform

研究了应用于移动平台的器官柔性形变仿真方法。提出了面向移动平台的碰撞检测方法,通过模型的外层包围盒迅速剔除场景中未发生碰撞的情况,进而对模型的几何面元进行相交检测,从而实现对器官的碰撞检测。研究了应用于虚拟器官的质点-弹簧模型,通过对形变区域的控制降低形变的计算量,通过对虚拟器械的运动控制避免形变过程中虚拟器官发生穿透或者脱离器械的现象。实验结果表明,器官柔性形变仿真与交互方法计算速度快、交互过程自然,可应用于移动平台的虚拟手术仿真系统中。

The elastic deformation simulation method of virtual organs is studied, which is then applied to a mobile platform. A collision detection method is proposed based on a mobile platform. By using an external bounding box of the model, the situations that collision is not happened in the scenario are rapidly eliminated. Collision detection of virtual organs is eventually achieved by intersecting detection for the geometrical facets of organ models. A mass-spring model ap- plied to virtual organs is studie＆ The computational complexity of the deformation is reduced by controlling the deformed area. During the process of the deformation, the virtual organs may be penetrated or break away from virtual instruments. These situations are avoided by controlling the movement of virtual instruments. The experimental results illus- trate that the simulation method can be applied to the virtual surgery simulation system on a mobile platform with quick calculation and natural interaction.