Open3D_C++_python语法对应指南V1

自动摘要: |版本号|作者|发布日期|修订| ||||| |V1.0.0|[@郑安帅(u25181970)](/u25 ……..

版本号	作者	发布日期	修订
V1.0.0	@郑安帅(u25181970)	2022-1-6	Open3D部署全冠模型记录
V1.1.0	@sindre	2023年3月17日	进行逻辑修正，整理

C++版(open3d)：

geometry::TriangleMesh mesh1;
bool flag = o3d::io::ReadTriangleMesh("./input.ply",mesh1);   

const Eigen::Vector3d &center = mesh1.GetAxisAlignedBoundingBox().GetCenter(); 
const geometry::AxisAlignedBoundingBox &boundingBox = mesh1.GetAxisAlignedBoundingBox();
//center对应python的normalize_translation
//boundingBox对应mesh.bounding_box.bounds
//需要注意的是trimesh.bounding_box.bounds类型是np.float64,而open3d返回的为float32，
//所以此处有精度损失。

const Eigen::Vector3d &maxBound = mesh1.GetAxisAlignedBoundingBox().GetMaxBound();
const Eigen::Vector3d &minBound = mesh1.GetAxisAlignedBoundingBox().GetMinBound();
const double normalize_scale= (maxBound - minBound).maxCoeff();
const double normalize_scale=(boundingBox.GetMaxBound()-boundingBox.GetMinBound()).maxCoeff()

python版：

#python(trimesh)
mesh = trimesh.load(mesh_path) 

#python(trimesh)
normalize_translation = mesh.bounding_box.centroid                                                    

#python(trimesh)                                           
normalize_scale = np.max(np.diff(mesh.bounding_box.bounds, axis=0))