An improved dynamic-octree-based judging method of real-time node in moving geometry

In applications that are realized based on octree space division (OSD) method, reconstruction speed of the corresponding part of tree structure is too slow when dynamic object moves, and the model fidelity is not enough when it is rendered by use of multiple nodes marking method. To achieve a better efficiency, an improved method by extending the bounding box of loose octree node is proposed. Firstly, the real-time relationship between geometry and node is confirmed by using the object pointer chain. Then the bounding box method is improved to expand and overlap the neighbor loose node related to dynamic object. Finally, the node belonged to the moving object is located by comparing length of object radius and divide-node side. Experimental results on benchmark datasets and simulation datasets indicate that the proposed method renders the model more realistically, and it improves the reconstruction speed and drawing efficiency of octree structure.