docs: add/update README

README.md

@@ -1,25 +1,57 @@
-# Nurbs curve surface intersection check
+# NurbsIntersection
 
-## Dependencies
+NURBS 曲线-曲面求交算法。实现 NURBS 几何体之间的求交计算，支持 BVH 加速和牛顿迭代优化。
 
-**STL**, **Libigl**, **Eigen**  and the dependencies of the **igl::opengl::glfw::Viewer (OpenGL, glad and GLFW)**. The  CMake build system will automatically download libigl and its dependencies using CMake FetchContent, thus requiring no setup on your part. 
+## 功能
 
+- NURBS 曲线与曲面求交
+- BVH（包围体层次结构）加速求交计算
+- 牛顿迭代法精确求解交点
 
+## 依赖
 
-## Platform
+- **libigl**：几何处理与可视化（GLFW + OpenGL）
+- **Eigen3**：线性代数
+- **STL**：C++ 标准库
 
-The project could run both on Linux and Windows. 
+## 平台
 
-## Compile
+支持 Linux 和 Windows。
-```
+
-mkdir build
+## 编译
-cd build
+
+```shell
+mkdir build && cd build
 cmake ..
-make #if you are using visual studio, find the .sln project and build it. 
+make
+```
+
+Windows 下使用 Visual Studio：
+```shell
+cmake -G "Visual Studio 17 2022" ..
+# 打开生成的 .sln 文件编译
 ```
 
-## Run
+## 运行
+
+参考 `examples/` 目录中的示例程序。
+
+## 目录结构
+
 ```
-You could check out examples/ for more details.
+.
-If you are using Visual Studio in Windows Platform, please choose one of the example project as a setup project then run it.
+├── include/
+│   ├── bvh.hpp              # BVH 加速结构
+│   ├── intersection.hpp     # 求交核心算法
+│   ├── newton.hpp           # 牛顿迭代求解
+│   └── show_libigl.hpp      # libigl 可视化
+├── src/                     # 对应实现文件
+├── examples/                # 示例程序
+├── cmake/
+│   └── libigl.cmake         # libigl 自动下载
+└── CMakeLists.txt
 ```
+
+## 作者
+
+李采月