From 96919bfe707c581540e9dee4b21850f95d06c639 Mon Sep 17 00:00:00 2001
From: Nicolas Predella <nicolas@predella.me>
Date: Mon, 8 Jun 2026 13:11:41 +0300
Subject: [PATCH] agy

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+# NodeSlicer
+
+NodeSlicer is a high-performance Blender extension providing a custom node-based interface for mesh slicing and G-code generation. It leverages NumPy for vectorized geometry processing and Pyclipper for robust 2D polygon operations.
+
+## Project Overview
+
+- **Purpose**: 3D printing slicing, CNC toolpathing, and procedural geometry tasks.
+- **Main Technologies**: Python, Blender API (`bpy`), NumPy, Pyclipper, Shapely.
+- **Architecture**: Separates Blender-specific UI and data capture (`infra/`) from core geometric and slicing algorithms (`core/`).
+
+## Building and Running
+
+### Requirements
+- Blender 4.2 or newer (required for the Extension platform).
+- `uv` for Python dependency management.
+
+### Development Setup
+1. Clone the repository.
+2. Run `uv sync` to install development dependencies (like `fake-bpy-module`).
+
+### Building the Extension
+Run the build script to package the addon:
+```bash
+./build.sh
+```
+This generates a zip file in the `release/` directory using Blender's extension build system.
+
+### Installation
+1. Open Blender.
+2. Go to `Edit > Preferences > Extensions`.
+3. Click the arrow in the top right and select `Install from Disk`.
+4. Select the generated zip from the `release/` folder.
+
+## Project Structure
+
+- `__init__.py`: Main entry point. Defines the `NodeSlicer Tree`, custom Sockets, and all Nodes.
+- `registry.py`: Utility for automatic registration of Blender classes using the `@register_class` decorator.
+- `core/`:
+  - `slice.py`: Core slicing engine (plane-mesh intersection), buffering (offsetting), and infill generation.
+  - `geometry.py`: Shared geometry utility functions.
+- `infra/`:
+  - `blender_mesh_capture.py`: Logic for extracting mesh data from Blender objects into NumPy arrays.
+  - `blender_slice_nodes_generic.py`: Base classes for the node system and the evaluation logic (`resolve_input`).
+- `doc/`: Comprehensive documentation on modules and nodes.
+
+## Development Conventions
+
+- **Registration**: All Blender classes (Nodes, Sockets, Operators, Menus) must be decorated with `@register_class` from `registry.py` to ensure they are registered correctly during initialization.
+- **Node Evaluation**: Nodes follow a pull-based evaluation model. Use `resolve_input(self.inputs.get("SocketName"))` within a node's `evaluate_output` method to trigger the evaluation of upstream nodes.
+- **NumPy First**: For any geometry processing, prioritize NumPy vectorized operations over standard Python loops to maintain high performance.
+- **Scaling**: 2D polygon operations via Pyclipper use a `SCALE` factor (defined in `core/slice.py`) to convert floats to integers, as Pyclipper operates in integer space.
+- **Type Hinting**: Use exhaustive type hints for all new functions and classes.
+- **Documentation**: Update `doc/NODES.md` when adding new nodes and `doc/MODULES.md` when adding new modules.