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# `<div align="center"><strong>`torch-harmonics `</strong></div>`
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## 简介
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torch-harmonics 实现了球面微分信号处理功能,包括:
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* 球谐变换(Spherical Harmonic Transforms)
* 矢量球谐变换(Vector Spherical Harmonic Transforms)
* 球面离散-连续卷积(Discrete-Continuous Convolutions on the Sphere)
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## 安装
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组件支持组合
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| PyTorch版本 | fastpt版本 | torch-harmonics版本 | DTK版本  | Python版本      | 推荐编译方式 |
| ----------- | ---------- | ------------------- | -------- | --------------- | ------------ |
| 2.5.1       | 2.1.0      | 0.8.0               | >= 25.04 | 3.8、3.10、3.11 | fastpt不转码 |
| 2.4.1       | 2.0.1      | 0.8.0               | >= 25.04 | 3.8、3.10、3.11 | fastpt不转码 |
| 其他        | 其他       | 其他                | 其他     | 3.8、3.10、3.11 | hip转码      |
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+ pytorch版本大于2.4.1 && dtk版本大于25.04 推荐使用fastpt不转码编译。
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### 1、使用pip方式安装
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torch-harmonics whl包下载目录:[光和开发者社区](https://download.sourcefind.cn:65024/4/main),选择对应的pytorch版本和python版本下载对应lietorch的whl包
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```shell
pip install torch* (下载torch的whl包)
pip install fastpt* --no-deps (下载fastpt的whl包)
source  /usr/local/bin/fastpt -E
pip install torch-harmonics* (下载的torch-harmonics的whl包)
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```

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### 2、使用源码编译方式安装
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#### 编译环境准备
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提供基于fastpt不转码编译:
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1. 基于光源pytorch基础镜像环境:镜像下载地址:[光合开发者社区](https://sourcefind.cn/#/image/dcu/pytorch),根据pytorch、python、dtk及系统下载对应的镜像版本。
2. 基于现有python环境:安装pytorch,fastpt whl包下载目录:[光合开发者社区](https://sourcefind.cn/#/image/dcu/pytorch),根据python、dtk版本,下载对应pytorch的whl包。安装命令如下:
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```shell
pip install torch* (下载torch的whl包)
pip install fastpt* --no-deps (下载fastpt的whl包, 安装顺序,先安装torch,后安装fastpt)
pip install pytest
pip install wheel
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```
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#### 源码编译安装
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- 代码下载
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```shell
git clone http://developer.sourcefind.cn/codes/OpenDAS/torch-harmonics.git # 根据编译需要切换分支
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```

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- 提供2种源码编译方式(进入torch-harmonics目录):
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```
1. 设置不转码编译环境变量
source /usr/local/bin/fastpt -C
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2. 编译whl包并安装
python3 setup.py bdist_wheel
pip install dist/torch-harmonics* --no-deps
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3. 源码编译安装
python3 setup.py install --no-deps
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```

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#### 注意事项
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+ 若使用pip install下载安装过慢,可添加pypi清华源:-i https://pypi.tuna.tsinghua.edu.cn/simple/
+ ROCM_PATH为dtk的路径,默认为/opt/dtk
+ 在pytorch2.5.1环境下编译需要支持c++17语法,打开setup.py文件,把文件中的 -std=c++14 修改为 -std=c++17
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## Known Issue
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-
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## 参考资料
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- [README_ORIGIN](README_ORIGIN.md)
- [https://github.com/NVIDIA/torch-harmonics.git](https://github.com/NVIDIA/torch-harmonics.git)