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README.md

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-license: cc-by-4.0
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+# Synthesis Assets Explorer
+
+Discover massive open-source OpenUSD Sim‑Ready assets.<br><br>
+[English](https://github.com/Extwin-Synthesis/Synthesis-Assets-Explorer/blob/main/README.md)|[中文](https://github.com/Extwin-Synthesis/Synthesis-Assets-Explorer/blob/main/README_zh.md)
+<br><br>
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Synthesis_Brief.png" width="900">](https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgzLmoxwYo-9Kyfg.mp4)
+
+## About the open source assets on https://synthesis.extwin.com
+
+1) Articulated Sim‑Ready assets with joints, physics parameters, semantic, and PBR materials (continuously adding)
+- Fidelity: assets are reverse‑modeled as close as possible to real‑world objects at 1:1 scale to ensure quality.
+- Joints: most Sim‑Ready objects include joints and follow a unified naming convention.
+- Collider: all objects include colliders. SDF is used by default; depending on the case, convex decomposition or convex hulls are used. You can adjust or add simplified colliders as needed.
+- Rigid/Deformable: all Mesh prims are authored with appropriate rigid and deformable body.
+- Coordinates: for convenience, the origin is set to the asset’s bottom center. No transforms are authored on Mesh prims; transforms are authored on parent Xform prims. Joint locations align exactly with Body1’s pivot.
+- Semantic: all Xform prims include Semantic Data.
+- Articulate Drive: all joints include a default Velocity Drive using acceleration‑based control (trajectory‑first) with damping and stiffness. You can tune parameters as required.
+- Materials: PBR materials and physics materials are assigned according to visual material types, with baseline friction, density, etc. Adjust in your use case as needed.
+- Script: some assets include script nodes to simulate more accurate physical behavior (e.g., hinge damping varying with door angle).
+- References: see papers from open‑source project we contributed [ArtVIP](https://x-humanoid-artvip.github.io) for detailed descriptions.
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Sim_Ready.png" width="900">]( https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgzbmoxwYogIzwxwY.mp4)
+
+2) Real‑world building models and spaces with lighting, PBR materials, and semantic data (continuously adding)
+- Sourced from real project BIM (Building Information Model) model.
+- Includes complete building component hierarchies and detailed properties.
+- Currently provides partial spaces; full buildings/spaces will be added (residential, hospital, commercial, airport, substation, metro, etc.).
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Model.png" width="900">](https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgyrmoxwYooaOEqQE.mp4)
+
+3) 3D Gaussian Splatting scenes in USDZ format (continuously growing)
+- Based on the [3DGrut](https://github.com/nv-tlabs/3dgrut) project.
+- Currently offers sample scenes.
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/3DGS.png" width="900">](https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgybmoxwYo0v2QqAU.mp4)
+
+4) Fully interactive scenes composed from Sim‑Ready assets, models, and 3D Gaussian Splatting (continuously adding)
+
+5) All assets are available in OpenUSD format for download (MJCF conversion to be released)
+
+6) All assets can be viewed and interacted with directly in a WebGL‑enabled browser
+
+7) Built‑in scene editor for assembling scenes in a WebGL‑enabled browser (Business User Only)
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Scene_Editor.png" width="900">](https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgyrmoxwYos9jOngM.mp4)
+
+8) License: CC BY‑NC 4.0
+
+## About Synthesis Assets Explorer
+
+Synthesis Assets Explorer is an Omniverse Kit extension that lets you browse and load high‑quality OpenUSD articulated Sim‑Ready assets, architectural models, 3D Gaussian Splatting models, and fully interactive scenes from https://synthesis.extwin.com into Omniverse applications (Isaac Sim, USD Composer). You can access and load assets from https://synthesis.extwin.com just like using NVIDIA’s official asset libraries.
+
+## Requirments
+- Omniverse Kit 107.3+
+- Isaac Sim 5.0+
+
+## Quick Start
+### 1.Navigate to the corresponding Isaac sim binary directory：
+
+- Linux: `_build/linux-x86_64/release`
+- Windows: `_build/windows-x86_64/release`
+
+### 2.Clone the Repository
+    git clone https://github.com/Extwin-Synthesis/Synthesis-Assets-Explorer.git extwin.synthesis_explorer
+    cd extwin.synthesis_explorer
+
+### 3.Build
+
+    Run the following command to initiate:
+
+    - Linux: ./install.sh
+    - Windows: .\install.bat
+
+## 4.Usage
+1) Browsing&Loading
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Omniverse_Extension.png" width="900">](https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgyrmoxwYorZaVoQM.mp4)
+
+2) Sim‑Ready
+- Because no test Fixed Joint is included, please add a Ground Plane or add a Fixed Joint to a body when play.
+- If you see rendering issues with transparent objects, adjust the relevant parameter accordingly.
+
+<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Translucency.png" width="900">
+
+3) Model
+- Likewise, add a Ground Plane or a Fixed Joint.
+
+4) 3D Gaussian Splatting
+- To sharpen 3D Gaussian Splatting, adjust the following parameters; note this may affect other objects (pending Omniverse optimization).
+<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/3DGS_param.png" width="900">
+
+5) Scenes
+- because of contain many assets,some scenes maybe have viberation when play due to the collission; please fine‑tune as needed. We strive to eliminate such cases in testing, but due to hardware variability some users may still encounter them.
+- please be patient when loading scene.
+
+## Make Sim-Ready
+
+If you have specific asset requirements, please let us know:
+
+1) Open‑sourced assets
+- If you agree to open‑source the assets, we will produce them free of charge per your specifications and upload them to https://synthesis.extwin.com. Please provide detailed requirements and any existing 3D models (3DS, glTF, USD, STP, IFC, or professional formats such as Revit, 3ds Max, SketchUp, SolidWorks, MicroStation, Inventor, Navisworks, etc.), or real‑world measurements with detailed photos. We cannot guarantee a timeline but will complete them as soon as possible.
+
+2) Private assets
+- If you prefer private assets, use the contact in the For Business section on https://synthesis.extwin.com. We will estimate cost and timeline per your requirements, create a dedicated private repository for you on https://synthesis.extwin.com, and upload the assets there.

README_zh.md

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+# Synthesis Assets Explorer
+
+Discover massive open-source OpenUSD Sim‑Ready assets.<br><br>
+[English](https://github.com/Extwin-Synthesis/Synthesis-Assets-Explorer/blob/main/README.md)|[中文](https://github.com/Extwin-Synthesis/Synthesis-Assets-Explorer/blob/main/README_zh.md)
+<br><br>
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Synthesis_Brief.png" width="900">](https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgzLmoxwYo-9Kyfg.mp4)
+
+## 关于 https://synthesis.extwin.com 中的开源资产
+
+1) 带有关节、物理参数、标注和 PBR 材质的 Sim‑Ready 资产库（持续添加中）
+- 精细度：所有资产都尽量按照实物 1:1 逆向重建，确保质量
+- 关节：大部分 Sim‑Ready 对象都包含关节，并按照统一命名规则进行命名
+- 碰撞体：所有对象都添加了碰撞体（默认使用 SDF，但按照实际情况，也有部分使用凸分解和凸包，您可以按照要求调整或添加简化碰撞体）
+- 刚体和软体：所有 Mesh 对象都按照实际添加了刚体和软体
+- 坐标：为了方便使用，资产的坐标原点设定为资产的底部中心点；所有 Mesh 上均不添加 Transform，Transform 全部添加在其父级 Xform 上；关节的位置与 Body1 的 Pivot 点严格一致
+- 标记：所有 Xform 上均添加 Semantic Data
+- 驱动：所有关节均默认添加了 Velocity Driver，使用加速度驱动（轨迹优先），并添加阻尼和刚度，具体参数您可以在使用时按照要求调整
+- 材质：所有材质均按照材质不同添加了对应的物理材质并给了基本的摩擦、密度等参数，具体使用中按照要求调整
+- 脚本节点：部分资产包含脚本节点，用于模拟更加准确的物理效果（比如：随着开门角度改变，关节阻尼发生变化）
+- 参考：我们参与的开源项目[ArtVIP](https://x-humanoid-artvip.github.io)相关的论文中有详细的描述，请参阅
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Sim_Ready.png" width="900">]( https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgzbmoxwYogIzwxwY.mp4)
+
+2) 带有灯光、PBR 材质、标注的真实建筑的建筑模型和建筑空间（持续添加中）
+- 来源于真实项目的 BIM（Building Information Model）模型
+- 包含完整的建筑对象层级关系及详细属性
+- 目前只是提供了建筑空间的局部，后续会陆续提供完整建筑空间的模型（家庭、医院、商业、机场、变电站、地铁……）
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Model.png" width="900">](https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgyrmoxwYooaOEqQE.mp4)
+
+3) USDZ 格式的 3D 高斯泼溅场景（持续增加中）
+- 基于 [3DGrut](https://github.com/nv-tlabs/3dgrut) 项目
+- 目前仅提供了一些示例场景
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/3DGS.png" width="900">](https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgybmoxwYo0v2QqAU.mp4)
+
+4) 利用 Sim‑Ready、模型、3D 高斯泼溅搭建的全交互的场景（持续添加中）
+
+5) 所有资产均有 OpenUSD 格式并支持下载（MJCF 格式转换功能待发布）
+
+6) 所有资产均可在浏览器（支持 WebGL）中直接查看和操作
+
+7) 内建场景编辑器，支持在浏览器（支持 WebGL）中搭建场景（Business User Only）
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Scene_Editor.png" width="900">](https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgyrmoxwYos9jOngM.mp4)
+
+8) 开源协议：CC BY‑NC 4.0
+
+## 关于Synthesis Assets Explorer
+Synthesis Assets Explorer 是一个用于在 Omniverse 平台（Isaac Sim，USD Composer）中加载 https://synthesis.extwin.com 里 OpenUSD 格式的高质量 Sim‑Ready铰链资产、建筑模型、3D 高斯泼溅模型以及全交互场景的插件。通过这个插件，您可以像访问 NVIDIA 官方资产库一样访问和加载 https://synthesis.extwin.com 中的资产。
+
+## 版本要求
+- Omniverse Kit 107.3+
+- Isaac Sim 5.0+
+
+## 如何安装
+### 1.定位到Isaac sim执行程序的目录：
+
+- Linux: `_build/linux-x86_64/release`
+- Windows: `_build/windows-x86_64/release`
+
+### 2.Clone文件
+    git clone https://github.com/Extwin-Synthesis/Synthesis-Assets-Explorer.git extwin.synthesis_explorer
+    cd extwin.synthesis_explorer
+
+### 3.编译
+
+    执行以下命令:
+
+    - Linux: ./install.sh
+    - Windows: .\install.bat
+
+
+## 4.如何使用
+
+1) 浏览&加载
+
+[<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Omniverse_Extension.png" width="900">](https://31341094.s21v.faiusr.com/58/1/ABUIABA6GAAgyrmoxwYorZaVoQM.mp4)
+
+2) Sim‑Ready
+- 因为没有添加测试用的 Fixed Joint，所以在 Play 时需要添加一个 Ground Plane 或在 Body 对象上添加 Fixed Joint
+- 如果遇到透明物体显示异常，需要调整这个参数：
+
+<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/Translucency.png" width="900">
+
+
+3) Model
+- 同样需要添加 Ground Plane 或者 Fixed Joint
+
+4) 3D 高斯泼溅
+- 如果需要让 3D 高斯泼溅更加清晰，可以修改以下参数，但会影响到其它对象（待 Omniverse 优化）：
+
+<img src="https://github.com/Extwin-Synthesis/Synthesis_Video/raw/main/3DGS_param.png" width="900">
+
+5) 场景
+- 场景中因为资产较多，部分用户在 Play 时可能会有一些因为碰撞引起的抖动，需要您进行微调。我们尽量在测试时消除这些情况，但因为不同的硬件环境，部分用户依然会出现类似的情况。
+
+## 如果您有明确的资产需求，请告知我们
+
+1) 开源资产制作
+- 如果您接受将这些资产开源，我们将按照您的要求免费制作，并上传至 https://synthesis.extwin.com。需要您提供详细的需求和既有的 3D 模型（3DS、glTF、USD、STP、IFC 或 Revit、3Ds Max、Sketchup、Solidworks、Microstation、Inventor、Navisowrks 等专业软件格式）或者实物的尺寸和尽量详细的照片（我们不能保证时间，会尽快完成）
+
+2) 私有资产制作
+- 如果您想制作私有资产，请使用 https://synthesis.extwin.com 中 For Business 部分的联系方式联系我们。我们将按照您的要求评估价格和完成时间，并在 https://synthesis.extwin.com 中为您创建专属的私有仓库并上转这些资产。