首先，对输入的点云模型进行八叉树分解。然后，用局部函数对八叉树节点包围球进行拟合。最后，利用加权函数构建全局隐函数，表达整个点云模型代表的曲面。 -First of all, the point cloud model to the input of the octree decomposition. Then, by fitting the octree node bounding sphere with local function. Finally, a global implicit