【摘要】 为实现实时高效的体数据切割操作,提出一种将人机交互和基于GPU的体绘制相结合的切割方法.先通过人机交互生成多个切割体的几何形状并三角化,将其作为基于GPU的光线投射算法的代理面,然后利用深度剥离算法获得光线在所有代理面上的出入射点坐标,并用多个通道完成体绘制.该方法在单个3D纹理上进行,可以实现多个任意形状的切割体切割,在节省GPU内存空间的同时,提高了切割后的绘制效率.更多还原

【Abstract】 In order to realize real-time and efficient volume cutting,this paper presents a cutting method based on human-computer interaction and GPU volume rendering.By the method,first,the 3D cutting volume surfaces are generated by human interactions and trianglization.These 3D surfaces are used as proxy geometry for GPU-based ray-casting algorithm.Then,the ray’s enter and leaving points on the proxies are determined through the depth peeling algorithm.Finally,the n-pass volume rendering is achieved.The proposed method is applied to single 3D texture,it achieves arbitrary-shaped multiple cutting.The rendering efficiency after cutting can be improved while the memory on GPU is saved.更多还原