# SSBO Editor Component Usage Guide

This directory contains a modular SSBO Scene Editor component for Panda3D RenderPipeline.

## 📁 File Structure

- `ssbo_editor.py`: Main component class `SSBOEditor`. Handles ImGui, RP integration, and input.
- `ssbo_controller.py`: Core logic for object ID baking and SSBO matrix packing.
- `effects/ssbo_instancing.yaml`: The custom shader effect for RenderPipeline (includes Normal Matrix fix).
- `demo_component.py`: Example usage script.

## 🚀 How to Integrate

### 1. Prerequisites

Ensure your project has:
- `RenderPipeline` setup
- `imgui_bundle` and `p3dimgui` installed
- `panda3d` (version 1.10.15+)

### 2. Basic Setup (See demo_component.py)

```python
from direct.showbase.ShowBase import ShowBase
from rpcore import RenderPipeline
from ssbo_component.ssbo_editor import SSBOEditor

class MyApp(ShowBase):
    def __init__(self):
        # 1. Initialize RP
        self.rp = RenderPipeline()
        self.rp.pre_showbase_init()
        super().__init__()
        self.rp.create(self)
        
        # 2. Add SSBO Component
        # Pass your ShowBase instance (self), the RP instance (self.rp), and your model path
        self.editor = SSBOEditor(
            base_app=self, 
            render_pipeline=self.rp, 
            model_path="path/to/your/model.glb",
            font_path="path/to/chinese/font.ttc" # Optional
        )

app = MyApp()
app.run()
```

### 3. Key Features

- **SSBO Instancing**: Efficiently renders thousands of objects using hardware instancing.
- **Normal Correction**: Default shaders are patched to correctly handle non-uniform scaling (Inverse Transpose Normal Matrix).
- **ImGui Editor**: Built-in scene tree browsing, search, and selection.
- **Object Manipulation**: Select and move objects (Arrows + Z/X keys).
- **Shadow Integration**: Correctly injects SSBO data into RP shadow passes.
- **Motion Blur Support**: Computes per-object velocity for correct motion blur.

### 4. Notes

- **Model Preparation**: The input model should have a clear hierarchy. The component will flatten it but preserve logical objects for selection.
- **Effects Path**: The `ssbo_instancing.yaml` is loaded relative to the `ssbo_editor.py` file, so the directory structure inside `ssbo_component` should be preserved.
- **GPU Picking**: Basic GPU picking is implemented using shaders in `ssbo_component/shaders/`. These are loaded automatically relative to the component path.

## ⚠️ Important for RenderPipeline

If you encounter `ImportError: No module named 'rplibs.six.moves'`, ensure you apply the compatibility fix at the start of your main script (as seen in `demo_component.py`).