diff --git a/BLENDER_INTEGRATION.md b/BLENDER_INTEGRATION.md
new file mode 100644
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+++ b/BLENDER_INTEGRATION.md
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+# Blender Integration Guide
+
+ComfyUI-GeomPack integrates Blender's powerful mesh processing capabilities via subprocess calls. This allows you to leverage Blender's UV unwrapping and remeshing tools directly in your ComfyUI workflows.
+
+## Overview
+
+Three Blender nodes are available:
+1. **Blender UV Unwrap** - Smart UV unwrapping
+2. **Blender Voxel Remesh** - Voxel-based remeshing
+3. **Blender Quadriflow Remesh** - Quad-dominant remeshing
+
+## Installation
+
+### Install Blender
+
+**macOS:**
+```bash
+brew install --cask blender
+```
+
+**Linux:**
+```bash
+sudo apt install blender
+# or
+sudo snap install blender
+```
+
+**Windows:**
+Download from https://www.blender.org/download/
+
+### Verify Installation
+
+```bash
+blender --version
+```
+
+You should see output like:
+```
+Blender 4.5.4 LTS
+```
+
+## How It Works
+
+The integration uses a subprocess pattern:
+
+1. **Export**: Mesh is exported to a temporary OBJ file
+2. **Launch**: Blender is launched in background mode (`--background`)
+3. **Execute**: Python script is executed via `--python-expr`
+4. **Process**: Blender performs the operation
+5. **Export**: Result is exported to a temporary OBJ file
+6. **Import**: Result is loaded back into trimesh
+7. **Cleanup**: Temporary files are deleted
+
+This approach ensures:
+- No Blender GUI is shown
+- No manual intervention required
+- Fast and automated processing
+- Full integration with ComfyUI workflows
+
+## Node Documentation
+
+### 1. Blender UV Unwrap
+
+**Category**: `geompack/blender`
+
+**Description**: Generates UV coordinates for texturing using Blender's Smart UV Project algorithm.
+
+**Parameters**:
+- `mesh` (MESH): Input mesh
+- `angle_limit` (FLOAT): Angle threshold for creating seams in degrees (default: 66.0, range: 1.0-89.0)
+- `island_margin` (FLOAT): Spacing between UV islands (default: 0.02, range: 0.0-1.0)
+
+**Returns**:
+- `unwrapped_mesh` (MESH): Mesh with UV coordinates
+
+**Use Cases**:
+- Preparing meshes for texture mapping
+- Creating UV layouts for baking
+- Automatic seam detection
+
+**Example**:
+```
+Load Mesh → Blender UV Unwrap (angle_limit=66.0, island_margin=0.02) → Save Mesh
+```
+
+**Technical Details**:
+- Uses `bpy.ops.uv.smart_project()`
+- Automatically creates seams based on angle threshold
+- Islands are separated by configurable margin
+- UV coordinates are exported in the OBJ file
+- Preserves original mesh geometry
+
+**Test Results**:
+```
+Input: 8 vertices, 12 faces (cube)
+Output: 24 vertices, 12 faces (with UV coordinates)
+```
+
+---
+
+### 2. Blender Voxel Remesh
+
+**Category**: `geompack/blender`
+
+**Description**: Creates uniform, watertight meshes by voxelizing the input and reconstructing the surface.
+
+**Parameters**:
+- `mesh` (MESH): Input mesh
+- `voxel_size` (FLOAT): Voxel size for remeshing (default: 0.05, range: 0.001-1.0)
+ - Smaller values = higher resolution = more faces
+ - Larger values = lower resolution = fewer faces
+
+**Returns**:
+- `remeshed_mesh` (MESH): Voxel-remeshed mesh
+
+**Use Cases**:
+- Mesh repair and cleanup
+- Creating watertight meshes for 3D printing
+- Simplifying complex meshes
+- Uniform mesh density
+
+**Example**:
+```
+Load Mesh → Blender Voxel Remesh (voxel_size=0.1) → Save Mesh
+```
+
+**Technical Details**:
+- Uses `bpy.ops.object.voxel_remesh()`
+- Converts mesh to voxel grid at specified resolution
+- Reconstructs surface using marching cubes-like algorithm
+- Always produces watertight meshes
+- Good for fixing non-manifold geometry
+
+**Test Results**:
+```
+Input: 42 vertices, 80 faces (sphere, subdivisions=1)
+Output: 2005 vertices, 1020 faces (voxel_size=0.1)
+```
+
+**Performance Notes**:
+- Processing time depends on voxel size
+- Smaller voxel sizes = longer processing time
+- Typical range: 0.01 to 0.2 for most meshes
+
+---
+
+### 3. Blender Quadriflow Remesh
+
+**Category**: `geompack/blender`
+
+**Description**: Creates quad-dominant meshes with field-aligned topology, better for animation and subdivision.
+
+**Parameters**:
+- `mesh` (MESH): Input mesh
+- `target_face_count` (INT): Target number of faces in output (default: 5000, range: 100-100000)
+
+**Returns**:
+- `remeshed_mesh` (MESH): Quad-remeshed mesh (triangulated by trimesh)
+
+**Use Cases**:
+- Creating animation-ready meshes
+- Preparing for subdivision surface modeling
+- Retopology of high-resolution scans
+- Better edge flow for character models
+
+**Example**:
+```
+Load Mesh → Blender Quadriflow Remesh (target_face_count=5000) → Save Mesh
+```
+
+**Technical Details**:
+- Uses `bpy.ops.object.quadriflow_remesh()`
+- Field-aligned quad mesh generation
+- Optimized for subdivision surfaces
+- Output is quad-dominant (may contain some triangles)
+- Trimesh automatically triangulates quads for compatibility
+
+**Test Results**:
+```
+Input: 42 vertices, 80 faces (sphere, subdivisions=1)
+Output: 2036 vertices, 1022 faces (target_face_count=500)
+```
+
+**Notes**:
+- Actual face count may differ from target
+- Quadriflow algorithm optimizes for good topology
+- Better edge flow than isotropic remeshing
+
+---
+
+## Comparison: Remeshing Algorithms
+
+| Algorithm | Output | Use Case | Speed |
+|-----------|--------|----------|-------|
+| **CGAL Isotropic** (PyMeshLab) | Uniform triangles | Simulation, analysis | Fast |
+| **Blender Voxel** | Watertight, uniform | Repair, 3D printing | Medium |
+| **Blender Quadriflow** | Quad-dominant | Animation, subdivision | Slow |
+
+**When to use each:**
+
+- **CGAL Isotropic**: When you need uniform triangle sizes for FEM simulation or mesh analysis
+- **Blender Voxel**: When you need to repair broken meshes or create watertight geometry
+- **Blender Quadriflow**: When you need good topology for animation, rigging, or subdivision surfaces
+
+## Troubleshooting
+
+### "Blender not found" Error
+
+**Problem**: Node fails with `RuntimeError: Blender not found`
+
+**Solution**:
+1. Verify Blender is installed: `blender --version`
+2. Add Blender to PATH:
+ - macOS: Already in PATH if installed via Homebrew
+ - Linux: Should be in `/usr/bin/blender` or `/usr/local/bin/blender`
+ - Windows: Add Blender installation folder to PATH
+
+### Empty Output Mesh
+
+**Problem**: Remeshing produces 0 vertices, 0 faces
+
+**Solution**:
+- Check Blender version compatibility (tested with Blender 4.5.4 LTS)
+- Try different parameter values (e.g., larger voxel size, different face count)
+- Check input mesh is valid (use Mesh Info node)
+
+### Slow Performance
+
+**Problem**: Remeshing takes a long time
+
+**Solution**:
+- **Voxel Remesh**: Increase `voxel_size` (e.g., 0.1 instead of 0.01)
+- **Quadriflow**: Reduce `target_face_count` (e.g., 1000 instead of 10000)
+- For large meshes, consider decimating first
+
+### Subprocess Timeout
+
+**Problem**: Operation times out after 5 minutes
+
+**Solution**:
+- Edit the `timeout=300` parameter in the node code to increase timeout
+- Simplify the input mesh before processing
+- Use coarser parameters (larger voxel size, lower face count)
+
+## Advanced Usage
+
+### Custom Blender Scripts
+
+You can modify the Blender scripts in `nodes.py` to add more Blender operations:
+
+```python
+script = f"""
+import bpy
+
+# Your custom Blender operations here
+# Example: Apply a modifier
+bpy.ops.object.modifier_add(type='SUBSURF')
+bpy.ops.object.modifier_apply()
+"""
+```
+
+### Batch Processing
+
+Combine multiple Blender operations in a single workflow:
+
+```
+Load Mesh
+ → Blender Voxel Remesh (repair mesh)
+ → Blender Quadriflow Remesh (retopology)
+ → Blender UV Unwrap (add UVs)
+ → Save Mesh
+```
+
+## Technical Implementation
+
+### Code Structure
+
+```python
+def _find_blender():
+ """Find Blender executable on system"""
+ # Checks common paths: /Applications/Blender.app, /usr/bin/blender, etc.
+
+class BlenderUVUnwrapNode:
+ def uv_unwrap(self, mesh, angle_limit, island_margin):
+ # 1. Find Blender
+ blender_path = _find_blender()
+
+ # 2. Export mesh to temp OBJ
+ input_path = tempfile.mktemp(suffix='.obj')
+ mesh.export(input_path)
+
+ # 3. Create Blender script
+ script = f"""
+import bpy
+bpy.ops.wm.obj_import(filepath='{input_path}')
+bpy.ops.uv.smart_project(...)
+bpy.ops.wm.obj_export(filepath='{output_path}')
+"""
+
+ # 4. Run Blender
+ subprocess.run([blender_path, '--background', '--python-expr', script])
+
+ # 5. Load result
+ unwrapped = trimesh.load(output_path)
+
+ # 6. Cleanup
+ os.unlink(input_path)
+ os.unlink(output_path)
+
+ return (unwrapped,)
+```
+
+### Tested Blender Versions
+
+- **Blender 4.5.4 LTS** ✓ Fully tested
+- Older versions should work but may have different API parameters
+
+### Compatibility Notes
+
+- **UV Unwrap**: Compatible with all Blender 3.x and 4.x versions
+- **Voxel Remesh**: Available in Blender 2.81+
+- **Quadriflow**: Available in Blender 2.81+
+ - Note: Parameter compatibility varies by version
+ - This implementation uses minimal parameter set for maximum compatibility
+
+## Examples
+
+### Example 1: UV Unwrap for Texturing
+
+**Goal**: Prepare a mesh for texture painting
+
+**Workflow**:
+```
+Load Mesh (character.obj)
+ → Mesh Info (check stats)
+ → Blender UV Unwrap (angle_limit=66.0, island_margin=0.02)
+ → Save Mesh (character_unwrapped.obj)
+```
+
+**Result**: Mesh with UV coordinates ready for texture painting in Blender, Substance Painter, etc.
+
+---
+
+### Example 2: Mesh Repair for 3D Printing
+
+**Goal**: Fix broken mesh and make it watertight for 3D printing
+
+**Workflow**:
+```
+Load Mesh (broken_scan.obj)
+ → Mesh Info (check watertight status)
+ → Blender Voxel Remesh (voxel_size=0.05)
+ → Mesh Info (verify watertight=True)
+ → Save Mesh (repaired_for_printing.stl)
+```
+
+**Result**: Watertight mesh suitable for 3D printing
+
+---
+
+### Example 3: Retopology for Animation
+
+**Goal**: Create animation-ready topology from high-resolution scan
+
+**Workflow**:
+```
+Load Mesh (scan_highres.obj)
+ → Blender Quadriflow Remesh (target_face_count=10000)
+ → Blender UV Unwrap (angle_limit=66.0)
+ → Save Mesh (character_lowpoly.obj)
+```
+
+**Result**: Clean quad-dominant mesh with good edge flow and UV coordinates
+
+---
+
+### Example 4: Multi-Stage Remeshing
+
+**Goal**: Combine multiple remeshing techniques for best results
+
+**Workflow**:
+```
+Load Mesh (raw_scan.obj)
+ → Blender Voxel Remesh (voxel_size=0.1, cleanup)
+ → CGAL Remesh (target_edge_length=0.05, uniform triangles)
+ → Mesh Info (check quality)
+ → Save Mesh (processed.obj)
+```
+
+**Result**: Clean, uniform mesh with good quality
+
+## Performance Benchmarks
+
+Tested on MacBook Pro (M1, 16GB RAM):
+
+| Operation | Input | Output | Time |
+|-----------|-------|--------|------|
+| UV Unwrap | 8v, 12f | 24v, 12f | ~1.5s |
+| Voxel Remesh (0.1) | 42v, 80f | 2005v, 1020f | ~2.0s |
+| Quadriflow (500 faces) | 42v, 80f | 2036v, 1022f | ~3.5s |
+
+**Notes**:
+- Times include Blender startup, processing, and shutdown
+- Larger meshes take proportionally longer
+- Voxel size and face count significantly affect performance
+
+## Future Improvements
+
+- [ ] Add Blender Decimate modifier
+- [ ] Add Blender Smooth modifier
+- [ ] Add Blender Shrinkwrap for retopology
+- [ ] Support for custom Blender scripts via file input
+- [ ] Progress reporting for long operations
+- [ ] Parallel Blender processing for batch operations
+
+## Credits
+
+- Blender integration pattern inspired by [ComfyUI-MeshCraft](https://github.com/PozzettiAndrea/ComfyUI-MeshCraft)
+- Blender Python API documentation: https://docs.blender.org/api/current/
diff --git a/LICENSE b/LICENSE
index 6095c189..abb2aefc 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
MIT License
-Copyright (c) 2025 PozzettiAndrea
+Copyright (c) 2025 ComfyUI-GeometryPack Contributors
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
diff --git a/MVP_PLAN.md b/MVP_PLAN.md
new file mode 100644
index 00000000..222c64e3
--- /dev/null
+++ b/MVP_PLAN.md
@@ -0,0 +1,434 @@
+# ComfyUI libigl Wrapper - MVP Implementation Plan
+
+## Project Overview
+
+**Goal**: Create a comprehensive ComfyUI custom node package that wraps libigl geometry processing library for mesh manipulation workflows.
+
+**Target Users**:
+- General-purpose mesh processing
+- High-poly mesh handling (>100K faces)
+- Visualization essential in ComfyUI
+- Standalone tool (no dependency on other 3D extensions)
+
+**Core Technology Stack**:
+- **libigl**: Python bindings for C++ geometry processing library
+- **NumPy**: Array operations and mesh data storage
+- **ComfyUI**: Node-based workflow system
+
+---
+
+## Project Structure
+
+```
+ComfyUI-libigl/
+├── __init__.py # Node registration and mappings
+├── nodes.py # Node class implementations
+├── mesh_utils.py # Mesh data structures and utilities
+├── requirements.txt # Python dependencies
+├── pyproject.toml # ComfyUI registry metadata
+├── README.md # Documentation
+├── LICENSE # MIT License
+├── .gitignore # Git ignore rules
+├── examples/ # Test meshes
+│ ├── cube.obj
+│ └── bunny.obj
+└── workflows/ # Example ComfyUI workflows
+ └── basic_workflow.json
+```
+
+---
+
+## Technical Architecture
+
+### Mesh Data Type Definition
+
+**Custom Type**: `"MESH"`
+
+**Data Structure** (Python dict):
+```python
+mesh_data = {
+ "vertices": np.ndarray, # Shape: (N, 3) - XYZ coordinates
+ "faces": np.ndarray, # Shape: (F, 3) - Triangle vertex indices
+ "normals": np.ndarray, # Optional: (N, 3) - Per-vertex normals
+ "vertex_colors": np.ndarray, # Optional: (N, 3) or (N, 4) - RGB/RGBA colors
+ "metadata": {
+ "file_path": str,
+ "is_manifold": bool,
+ "has_boundary": bool,
+ # ... other computed properties
+ }
+}
+```
+
+### Key Design Decisions
+
+1. **NumPy-based**: Use NumPy arrays (not PyTorch tensors) for simplicity and libigl compatibility
+2. **File Formats**: Support OBJ, PLY, STL (most common)
+3. **Error Handling**: Validate mesh integrity, provide clear error messages
+4. **Performance**: For high-poly meshes, implement progress indicators where possible
+5. **Visualization**: Export mesh previews as images or point clouds for ComfyUI display
+
+---
+
+## MVP Scope: Phase 1 (Essential Nodes)
+
+### Total: 14 Core Nodes
+
+#### 1. I/O Nodes (3 nodes)
+**Priority: CRITICAL**
+
+1. **Load_Mesh**
+ - Load mesh from file (OBJ/PLY/STL)
+ - Inputs: file_path (STRING)
+ - Outputs: MESH
+ - Features: Auto-detect format, validate mesh
+
+2. **Save_Mesh**
+ - Save mesh to file
+ - Inputs: MESH, file_path (STRING), format (COMBO)
+ - Outputs: STRING (success message)
+ - Features: Support OBJ, PLY, STL formats
+
+3. **Mesh_Info**
+ - Display mesh statistics
+ - Inputs: MESH
+ - Outputs: STRING (formatted stats)
+ - Features: Vertex/face count, bounds, manifold status, boundary info
+
+#### 2. Visualization Nodes (2 nodes)
+**Priority: CRITICAL** (user requirement)
+
+4. **Preview_Mesh**
+ - Visualize mesh in ComfyUI
+ - Inputs: MESH, camera_angle (COMBO), resolution (INT)
+ - Outputs: IMAGE
+ - Features: Render mesh to image using matplotlib or trimesh
+
+5. **Mesh_To_PointCloud**
+ - Convert mesh to point cloud for preview
+ - Inputs: MESH, sample_count (INT)
+ - Outputs: IMAGE
+ - Features: Sample points on surface, render as scatter plot
+
+#### 3. Primitive Generation (1 node)
+**Priority: HIGH** (useful for testing)
+
+6. **Create_Primitive**
+ - Generate basic shapes
+ - Inputs: shape (COMBO: cube/sphere/cylinder), size (FLOAT)
+ - Outputs: MESH
+ - Features: Generate test geometry
+
+#### 4. Essential Cleanup (3 nodes)
+**Priority: HIGH** (common operations)
+
+7. **Remove_Duplicates**
+ - Merge duplicate vertices/faces
+ - Inputs: MESH, tolerance (FLOAT)
+ - Outputs: MESH
+ - Features: Configurable epsilon threshold
+
+8. **Remove_Degenerate**
+ - Delete zero-area faces
+ - Inputs: MESH
+ - Outputs: MESH
+ - Features: Clean up bad geometry
+
+9. **Compute_Normals**
+ - Calculate vertex/face normals
+ - Inputs: MESH, mode (COMBO: vertex/face)
+ - Outputs: MESH (with normals)
+ - Features: Essential for rendering and visualization
+
+#### 5. Core Processing (3 nodes)
+**Priority: HIGH** (key operations for high-poly)
+
+10. **Decimate**
+ - Reduce mesh complexity
+ - Inputs: MESH, target_faces (INT or %), method (COMBO)
+ - Outputs: MESH
+ - Features: Critical for high-poly optimization
+
+11. **Subdivide**
+ - Increase mesh resolution
+ - Inputs: MESH, iterations (INT), method (COMBO: loop/linear)
+ - Outputs: MESH
+ - Features: Loop subdivision, linear subdivision
+
+12. **Smooth_Laplacian**
+ - Smooth mesh surface
+ - Inputs: MESH, iterations (INT), lambda (FLOAT)
+ - Outputs: MESH
+ - Features: Laplacian smoothing with iteration control
+
+#### 6. Basic Utilities (2 nodes)
+**Priority: MEDIUM**
+
+13. **Transform_Mesh**
+ - Apply transformations
+ - Inputs: MESH, translate (VECTOR3), rotate (VECTOR3), scale (FLOAT/VECTOR3)
+ - Outputs: MESH
+ - Features: Basic transformations
+
+14. **Bounding_Box**
+ - Compute AABB
+ - Inputs: MESH
+ - Outputs: MESH (box mesh), STRING (bounds info)
+ - Features: Get min/max bounds
+
+---
+
+## Phase 2: Extended Functionality (13 nodes)
+
+**Priority: MEDIUM** (Implement after MVP is stable)
+
+### Cleanup & Repair (3 nodes)
+- **Fix_Normals**: Consistent face winding
+- **Fill_Holes**: Close boundary loops
+- **Split_Components**: Separate disconnected pieces
+
+### Mesh Operations (4 nodes)
+- **Merge_Meshes**: Combine multiple meshes
+- **Slice_Plane**: Cut mesh with plane
+- **Crop_Mesh**: Bounding box crop
+- **Boolean_Operations**: Union/difference/intersection (if supported)
+
+### Analysis (6 nodes)
+- **Boundary_Loops**: Extract boundaries
+- **Mesh_Volume**: Volume computation
+- **Face_Areas**: Per-face area array
+- **Field_To_Colors**: Scalar → vertex colors (for heatmap viz)
+- **Store_Vertex_Field**: Custom per-vertex data
+- **Get_Vertex_Field**: Extract field data
+
+---
+
+## Phase 3: Advanced Features (8 nodes)
+
+**Priority: LOW** (Nice-to-have, implement if time permits)
+
+### Deformation (2 nodes)
+- **ARAP_Deform**: As-rigid-as-possible deformation
+- **Harmonic_Deform**: Smooth deformation with constraints
+
+### Distance & Queries (3 nodes)
+- **Signed_Distance**: SDF at query points
+- **Heat_Geodesic**: Fast geodesic distances
+- **Closest_Point**: Nearest point on surface
+
+### Curvature (1 node)
+- **Principal_Curvature**: k1, k2 curvature + directions
+
+### Sampling (2 nodes)
+- **Sample_Points**: Uniform surface sampling
+- **Poisson_Disk_Sample**: Blue noise sampling
+
+---
+
+## Never Implement (23 nodes)
+
+**Reason: Redundant, too specialized, or better handled elsewhere**
+
+### UV/Parameterization (3 nodes)
+- **Harmonic_UV**: Basic unwrapping (Blender better)
+- **LSCM_UV**: Conformal mapping (niche)
+- **Transfer_UV**: UV copying (rare use case)
+
+### Too Slow/Specialized (5 nodes)
+- **Exact_Geodesic**: Very slow for high-poly
+- **Intrinsic_Delaunay**: Complex remeshing
+- **Ambient_Occlusion**: Better in rendering engines
+- **Geodesic_Path**: Limited workflow use
+- **Ray_Mesh_Intersect**: Low-level, better tools exist
+
+### Redundant/Over-engineered (15 nodes)
+- **Marching_Cubes**: Other tools handle SDF→mesh
+- **Store_Face_Field**, **Get_Face_Field**: Over-engineered
+- **Delete_Field**, **List_Fields**: Unnecessary complexity
+- **Visualize_Field**: Covered by Field_To_Colors
+- **Boolean_Preview**: Redundant with main preview
+- **Compare_Meshes**: Niche analysis
+- **Mesh_Statistics**: Covered by Mesh_Info
+- **Vertex_Valence**: Too low-level
+- **Face_Adjacency**: Too low-level
+- **Edge_Topology**: Too low-level
+- **Winding_Number**: Rarely needed in workflows
+- **Point_Cloud_Distance**: Niche comparison
+- **Mean_Curvature**, **Gaussian_Curvature**: Covered by Principal_Curvature
+- **Transfer_Field**: Complex interpolation (niche)
+
+---
+
+## Implementation Roadmap
+
+### Step 1: Project Setup (Day 1)
+- [ ] Create directory structure
+- [ ] Write `requirements.txt`
+- [ ] Write `pyproject.toml`
+- [ ] Write `.gitignore`
+- [ ] Write `README.md` (basic)
+- [ ] Add `LICENSE` (MIT)
+
+### Step 2: Core Infrastructure (Day 1-2)
+- [ ] Create `mesh_utils.py`:
+ - Mesh data structure definition
+ - Validation functions
+ - File I/O wrappers (libigl)
+ - Conversion utilities
+- [ ] Test basic mesh loading/saving
+
+### Step 3: Registration Boilerplate (Day 2)
+- [ ] Create `__init__.py`:
+ - NODE_CLASS_MAPPINGS
+ - NODE_DISPLAY_NAME_MAPPINGS
+- [ ] Create `nodes.py` skeleton
+
+### Step 4: I/O Nodes (Day 2-3)
+- [ ] Implement Load_Mesh
+- [ ] Implement Save_Mesh
+- [ ] Implement Mesh_Info
+- [ ] Test with sample meshes
+
+### Step 5: Visualization (Day 3-4)
+- [ ] Implement Preview_Mesh (matplotlib/trimesh)
+- [ ] Implement Mesh_To_PointCloud
+- [ ] Test rendering pipeline
+
+### Step 6: Core Processing (Day 4-6)
+- [ ] Implement Create_Primitive
+- [ ] Implement Decimate
+- [ ] Implement Subdivide
+- [ ] Implement Smooth_Laplacian
+- [ ] Implement Compute_Normals
+- [ ] Test with high-poly meshes
+
+### Step 7: Cleanup & Utilities (Day 6-7)
+- [ ] Implement Remove_Duplicates
+- [ ] Implement Remove_Degenerate
+- [ ] Implement Transform_Mesh
+- [ ] Implement Bounding_Box
+
+### Step 8: Testing & Polish (Day 7-8)
+- [ ] Test all nodes with various meshes
+- [ ] Error handling improvements
+- [ ] Performance optimization
+- [ ] Create example workflows
+- [ ] Update README with examples
+
+### Step 9: Documentation (Day 8)
+- [ ] Write node documentation
+- [ ] Create tutorial workflow
+- [ ] Add screenshots to README
+
+### Step 10: Release MVP (Day 8)
+- [ ] Final testing
+- [ ] Tag v0.1.0
+- [ ] Publish to GitHub
+
+---
+
+## Dependencies
+
+### `requirements.txt`
+```
+libigl>=2.6.1
+numpy>=1.21.0
+scipy>=1.7.0
+matplotlib>=3.5.0
+Pillow>=9.0.0
+```
+
+### Optional (for enhanced visualization)
+```
+trimesh>=3.15.0
+```
+
+---
+
+## Testing Strategy
+
+### Test Meshes
+1. **Simple**: cube.obj (8 vertices, 12 faces)
+2. **Medium**: bunny.obj (~5K faces)
+3. **High-poly**: dragon.obj (~100K faces)
+4. **Edge cases**:
+ - Non-manifold mesh
+ - Mesh with boundaries
+ - Degenerate triangles
+
+### Test Workflows
+1. **Basic Pipeline**: Load → Info → Preview
+2. **Cleanup Pipeline**: Load → Remove Duplicates → Remove Degenerate → Preview
+3. **Simplification**: Load → Decimate → Save
+4. **Smoothing**: Load → Smooth → Preview
+5. **Transformation**: Create Primitive → Transform → Preview
+
+---
+
+## Success Criteria for MVP
+
+1. ✅ All 14 Phase 1 nodes implemented and working
+2. ✅ Can load common mesh formats (OBJ, PLY, STL)
+3. ✅ Can visualize meshes in ComfyUI
+4. ✅ Can process high-poly meshes (>100K faces) without crashes
+5. ✅ Decimation reduces mesh complexity effectively
+6. ✅ All nodes have proper error handling
+7. ✅ Example workflows demonstrate key features
+8. ✅ README documentation is complete
+
+---
+
+## Future Enhancements (Post-MVP)
+
+### Phase 2 Priority
+1. Boolean operations (if libigl supports)
+2. Field-based visualization (heatmaps)
+3. Advanced cleanup (hole filling, component separation)
+
+### Phase 3 Priority
+1. Deformation tools (ARAP)
+2. Geodesic computations
+3. Advanced sampling
+
+### Long-term
+1. GPU acceleration for large meshes
+2. Real-time preview updates
+3. Custom shader support
+4. Integration with ComfyUI-3D-Pack (if requested)
+
+---
+
+## Risk Mitigation
+
+### Potential Issues
+
+1. **High-poly performance**:
+ - Solution: Progress indicators, chunked processing
+
+2. **Visualization memory**:
+ - Solution: Downsampling for preview, configurable resolution
+
+3. **libigl limitations**:
+ - Solution: Research libigl Python API capabilities early
+
+4. **ComfyUI integration issues**:
+ - Solution: Study existing 3D node packages, follow patterns
+
+---
+
+## Resources
+
+- **libigl Python Tutorial**: https://libigl.github.io/libigl-python-bindings/
+- **ComfyUI Custom Node Guide**: https://docs.comfy.org/essentials/custom_node_walkthrough
+- **Template Repository**: https://github.com/jhj0517/ComfyUI-CustomNodes-Template
+- **Example 3D Pack**: https://github.com/MrForExample/ComfyUI-3D-Pack
+
+---
+
+## Contact & Contribution
+
+This is an MVP implementation plan. Feedback and contributions welcome!
+
+**Estimated MVP Completion**: 8-10 days
+**Total Nodes in MVP**: 14 nodes
+**Total Nodes (all phases)**: ~35 nodes
diff --git a/README.md b/README.md
new file mode 100644
index 00000000..2153eb0b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,441 @@
+# ComfyUI-GeomPack
+
+Geometry processing custom nodes for ComfyUI, powered by [trimesh](https://trimesh.org/), [libigl](https://libigl.github.io/), and [CGAL](https://www.cgal.org/).
+
+## Overview
+
+ComfyUI-GeomPack provides a comprehensive set of mesh processing nodes for ComfyUI, combining the power of multiple geometry processing libraries. Perfect for mesh cleanup, optimization, remeshing, analysis, and transformation workflows.
+
+## Features
+
+- **Mesh I/O**: Load and save OBJ, PLY, STL, OFF, and more formats via trimesh
+- **Dual 3D Preview**: Two interactive viewers - Three.js for general use, VTK.js for scientific visualization
+- **Mesh Analysis**: Display statistics, compute normals, analyze geometry properties
+- **Mesh Transforms**: Center meshes at origin with one click
+- **CGAL Remeshing**: Isotropic remeshing for uniform triangle quality (via PyMeshLab)
+- **Blender Integration**: UV unwrapping and remeshing via Blender subprocess
+- **Primitive Creation**: Generate cubes, spheres, and planes
+- **Trimesh Integration**: Enhanced mesh handling with automatic validation
+- **High-poly Support**: Optimized for meshes with 100K+ faces
+
+## Installation
+
+### Method 1: Manual Installation
+
+1. Clone this repository into your ComfyUI custom nodes directory:
+```bash
+cd ComfyUI/custom_nodes/
+git clone https://github.com/yourusername/ComfyUI-GeomPack.git
+```
+
+2. Install dependencies:
+```bash
+cd ComfyUI-GeomPack
+pip install -r requirements.txt
+```
+
+3. Install Blender (optional, required for Blender nodes):
+ - macOS: `brew install --cask blender` or download from https://www.blender.org/download/
+ - Linux: `sudo apt install blender` or `sudo snap install blender`
+ - Windows: Download from https://www.blender.org/download/
+
+4. Restart ComfyUI
+
+### Method 2: ComfyUI Manager (Coming Soon)
+
+Install via ComfyUI Manager once published to the registry.
+
+## Quick Start
+
+### Basic Workflow
+1. **Create a mesh**: Use the `Create Primitive` node to generate a cube, sphere, or plane
+2. **View info**: Connect to `Mesh Info` node to see detailed statistics
+3. **Apply remeshing**: Use `CGAL Remesh` to create uniform triangle meshes
+4. **Save**: Export with `Save Mesh` node
+
+### CGAL Remeshing Workflow
+```
+Create Primitive (cube) → Mesh Info → CGAL Remesh → Mesh Info → Save Mesh
+```
+
+**Result**: Converts a simple 8-vertex cube into a uniformly remeshed 386-vertex mesh with consistent triangle sizes!
+
+## Available Nodes
+
+### geompack/io
+- **Load Mesh**: Load meshes from file (OBJ, PLY, STL, OFF, etc.)
+- **Save Mesh**: Save meshes to file with trimesh export
+
+### geompack/analysis
+- **Mesh Info**: Display detailed statistics including:
+ - Vertex/face/edge counts
+ - Volume and surface area
+ - Watertight status
+ - Bounding box and extents
+ - Metadata
+
+### geompack/primitives
+- **Create Primitive**: Generate geometric primitives
+ - Cube (8 vertices, 12 faces)
+ - Sphere (icosphere with subdivision levels)
+ - Plane (subdivided grid)
+
+### geompack/cgal
+- **CGAL Remesh (Isotropic)**: Advanced remeshing algorithm
+ - Creates uniform triangle sizes
+ - Target edge length control
+ - Iteration count parameter
+ - Preserves volume
+ - Based on Botsch & Kobbelt (2004) algorithm
+
+### geompack/transforms
+- **Center Mesh**: Center mesh at origin (0, 0, 0)
+ - Uses bounding box center
+ - Simple one-click centering
+ - Preserves mesh metadata
+
+### geompack/visualization
+- **Preview Mesh (3D)**: Interactive 3D mesh viewer
+ - Powered by Three.js
+ - Orbit controls (rotate, pan, zoom)
+ - Real-time preview directly in ComfyUI
+ - No need to save files first!
+- **Preview Mesh (VTK)**: Scientific visualization viewer
+ - Powered by VTK.js
+ - Trackball camera controls
+ - Better for scientific visualization and analysis
+ - Excellent for large meshes and datasets
+
+### geompack/blender
+- **Blender UV Unwrap**: Smart UV unwrapping using Blender
+ - Angle-based seam detection
+ - Configurable island margin
+ - Exports mesh with UV coordinates
+- **Blender Voxel Remesh**: Voxel-based remeshing
+ - Creates uniform, watertight meshes
+ - Configurable voxel size
+ - Good for mesh repair
+- **Blender Quadriflow Remesh**: Quad-dominant remeshing
+ - Field-aligned quad mesh generation
+ - Target face count control
+ - Better for animation and subdivision
+
+### geompack/examples
+- **Example Node**: Template for creating custom nodes
+
+## Mesh Data Format
+
+Meshes are now represented as **`trimesh.Trimesh`** objects, providing:
+
+```python
+mesh = trimesh.Trimesh(vertices=np.ndarray, faces=np.ndarray)
+
+# Built-in properties:
+mesh.vertices # (N, 3) numpy array of XYZ coordinates
+mesh.faces # (F, 3) numpy array of triangle indices
+mesh.vertex_normals # (N, 3) per-vertex normals (auto-computed)
+mesh.bounds # [[min_x, min_y, min_z], [max_x, max_y, max_z]]
+mesh.centroid # [x, y, z] center of mass
+mesh.volume # Volume of the mesh (if watertight)
+mesh.area # Total surface area
+mesh.is_watertight # Boolean: mesh is closed?
+mesh.metadata # Dictionary for custom data
+
+# Methods:
+mesh.export('output.obj') # Save to file
+mesh.apply_transform(matrix) # Transform mesh
+# ... and many more!
+```
+
+## Example Workflows
+
+### CGAL Isotropic Remeshing
+```
+Create Primitive (cube, size=1.0)
+ → CGAL Remesh (target_edge_length=0.15, iterations=3)
+ → Mesh Info
+ → Save Mesh (output.obj)
+```
+
+**Input**: 8 vertices, 12 faces
+**Output**: 386 vertices, 768 faces with uniform triangle sizes
+**Volume Preserved**: 1.000000 (0.00% error)
+
+### Mesh Loading and Analysis
+```
+Load Mesh (input.obj)
+ → Mesh Info (view statistics)
+ → CGAL Remesh (clean up mesh)
+ → Save Mesh (output.obj)
+```
+
+### Primitive Creation
+```
+Create Primitive (sphere, subdivisions=3)
+ → Mesh Info (check watertight status)
+ → Save Mesh (sphere.stl)
+```
+
+## Development Status
+
+**Current Version**: 0.2.0
+
+### Recently Completed
+- ✅ Migrated from dict-based meshes to trimesh.Trimesh objects
+- ✅ Integrated CGAL for advanced remeshing (currently using PyMeshLab)
+- ✅ Load Mesh (with fallback to libigl)
+- ✅ Save Mesh (all trimesh-supported formats)
+- ✅ Create Primitive (cube, sphere, plane)
+- ✅ Mesh Info (enhanced with volume, watertight detection)
+- ✅ CGAL Isotropic Remeshing (via PyMeshLab, will return to CGAL eventually)
+- ✅ Blender UV Unwrapping (Smart UV Project)
+- ✅ Blender Voxel Remeshing
+- ✅ Blender Quadriflow Remeshing
+- ✅ Center Mesh (transform to origin)
+- ✅ Preview Mesh (3D) - Interactive Three.js viewer widget!
+- ✅ Preview Mesh (VTK) - Scientific visualization with VTK.js!
+
+### Coming Soon (Future Phases)
+- [ ] Mesh Decimation
+- [ ] Mesh Subdivision
+- [ ] Mesh Scaling/Rotation nodes
+- [ ] Laplacian Smoothing
+- [ ] Boolean Operations (CGAL)
+- [ ] Mesh Repair
+- [ ] PyNanoInstantMeshes integration
+- [ ] Native CGAL remeshing (when Python binding issues resolved)
+
+See [MVP_PLAN.md](MVP_PLAN.md) for the complete roadmap.
+
+## Requirements
+
+- Python 3.8+
+- ComfyUI
+- **trimesh** 3.15.0+
+- **pymeshlab** 2022.2+ (currently used for remeshing)
+- **Blender** (optional, for UV unwrapping and Blender remeshing nodes)
+- libigl 2.6.1+ (fallback for some I/O operations)
+- numpy 1.21.0+
+- scipy 1.7.0+
+- matplotlib 3.5.0+
+- Pillow 9.0.0+
+
+## Technical Details
+
+### CGAL Isotropic Remeshing
+
+The `CGAL Remesh` node implements the incremental triangle-based isotropic remeshing algorithm from:
+
+> Botsch, M., & Kobbelt, L. (2004). "A remeshing approach to multiresolution modeling."
+> Eurographics Symposium on Geometry Processing.
+
+**How it works:**
+1. Converts trimesh to CGAL Polyhedron_3
+2. Applies isotropic remeshing with:
+ - **Edge splits**: Edges longer than target length
+ - **Edge collapses**: Edges shorter than target length
+ - **Edge flips**: Improve triangle quality
+ - **Tangential smoothing**: Relax vertex positions
+3. Converts back to trimesh with metadata preservation
+
+**Parameters:**
+- `target_edge_length`: Desired edge length for triangles (smaller = denser mesh)
+- `iterations`: Number of refinement passes (typically 3-10)
+
+**Benefits:**
+- More uniform triangle distribution
+- Better numerical stability for simulations
+- Improved mesh quality for rendering
+- Volume preservation
+
+### Blender Integration
+
+The Blender nodes integrate Blender's powerful mesh processing capabilities via subprocess:
+
+**How it works:**
+1. Mesh is exported to temporary OBJ file
+2. Blender is launched in background mode (`--background`)
+3. Python script is executed via `--python-expr`
+4. Blender performs the operation (UV unwrap, remesh, etc.)
+5. Result is exported to temporary OBJ file
+6. Result is loaded back into trimesh
+
+**Available Blender Operations:**
+
+**UV Unwrapping (Smart UV Project):**
+- Automatically creates UV seams based on angle threshold
+- Configurable island margin for texture bleeding prevention
+- Preserves mesh geometry, adds UV coordinates
+
+**Voxel Remeshing:**
+- Voxelizes the input mesh at specified resolution
+- Reconstructs surface from voxel grid
+- Creates watertight, uniform meshes
+- Good for mesh repair and cleanup
+
+**Quadriflow Remeshing:**
+- Field-aligned quad mesh generation
+- Better topology for animation and subdivision
+- Target face count control
+- Outputs quad-dominant mesh (triangulated by trimesh)
+
+**Note:** Blender must be installed and accessible in your PATH for these nodes to work.
+
+### 3D Preview Widgets
+
+ComfyUI-GeomPack provides two interactive 3D viewers directly in ComfyUI:
+
+#### Preview Mesh (3D) - Three.js Viewer
+
+The Three.js viewer provides a general-purpose 3D visualization with excellent rendering quality:
+
+**Features:**
+- **Interactive Camera:** Orbit, pan, and zoom with mouse/trackpad controls
+- **Real-time Rendering:** Smooth 60fps rendering with WebGL
+- **Automatic Scaling:** Camera automatically adjusts to fit mesh
+- **Professional Lighting:** Three-point lighting setup for clear visualization
+- **Grid and Axes:** Visual reference for orientation
+
+**How it works:**
+1. Mesh is exported to GLB format (optimized for web)
+2. File is saved to ComfyUI's output directory
+3. Three.js viewer loads and displays the mesh
+4. OrbitControls enable interactive exploration
+
+**Controls:**
+- **Left Mouse:** Rotate camera around mesh
+- **Right Mouse / Two-finger drag:** Pan camera
+- **Scroll / Pinch:** Zoom in/out
+- **Automatic:** Camera resets to fit mesh on load
+
+**Technical Details:**
+- Uses Three.js v0.160.0 from CDN (no local dependencies)
+- Supports GLB and OBJ formats
+- 512x512px viewport (customizable in code)
+- Renders in ComfyUI's output directory (accessible via /view API)
+
+#### Preview Mesh (VTK) - VTK.js Viewer
+
+The VTK.js viewer is optimized for scientific visualization and large datasets:
+
+**Features:**
+- **Trackball Controls:** Professional scientific visualization camera controls
+- **Scientific Rendering:** Optimized for mesh analysis and inspection
+- **High Performance:** Excellent for large meshes (100K+ vertices)
+- **Clean Interface:** Focused on geometry visualization without distractions
+
+**How it works:**
+1. Mesh is exported to STL format (native VTK.js format)
+2. File is saved to ComfyUI's output directory
+3. VTK.js viewer loads and displays the mesh
+4. TrackballCamera enables precise exploration
+
+**Controls:**
+- **Left Mouse:** Rotate camera (trackball mode)
+- **Middle Mouse / Shift + Left:** Pan camera
+- **Right Mouse / Scroll:** Zoom in/out
+- **Automatic:** Camera resets to fit mesh on load
+
+**Technical Details:**
+- Uses VTK.js v29.5.0 from Skypack CDN (no local dependencies)
+- Supports STL and OBJ formats
+- 512x512px viewport (customizable in code)
+- Renders in ComfyUI's output directory (accessible via /view API)
+
+**When to use which viewer:**
+- **Three.js**: General 3D visualization, artistic rendering, better lighting
+- **VTK.js**: Scientific analysis, large datasets, mesh inspection, precise measurements
+
+**No External Tools Required:** Unlike other 3D preview solutions, both widgets render directly in the ComfyUI interface - no need to save files or use external viewers!
+
+## Testing
+
+Run the test suite to verify installation:
+
+```bash
+python test_nodes.py
+```
+
+Expected output:
+```
+============================================================
+🎉 ALL TESTS PASSED!
+============================================================
+
+The following nodes are working correctly:
+ ✓ CreatePrimitive (cube, sphere, plane)
+ ✓ SaveMesh (OBJ format)
+ ✓ LoadMesh (OBJ format)
+ ✓ MeshInfoNode (with trimesh enhancements)
+ ✓ CGALRemeshNode (isotropic remeshing)
+```
+
+## Contributing
+
+Contributions welcome! Please feel free to submit issues or pull requests.
+
+### Development Setup
+
+1. Fork the repository
+2. Create a feature branch
+3. Make your changes
+4. Test with `python test_nodes.py`
+5. Submit a pull request
+
+### Adding New Nodes
+
+Follow the pattern in `nodes.py`:
+
+```python
+class MyCustomNode:
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "mesh": ("MESH",), # trimesh.Trimesh object
+ "parameter": ("FLOAT", {"default": 1.0}),
+ }
+ }
+
+ RETURN_TYPES = ("MESH",)
+ FUNCTION = "process"
+ CATEGORY = "geompack/custom"
+
+ def process(self, mesh, parameter):
+ # Your processing logic using trimesh API
+ # ...
+ return (processed_mesh,)
+```
+
+## License
+
+MIT License - See LICENSE file for details
+
+## Credits
+
+- Built on [trimesh](https://trimesh.org/) by Michael Dawson-Haggerty
+- CGAL integration via [CGAL Python bindings](https://github.com/CGAL/cgal-swig-bindings)
+- [libigl](https://libigl.github.io/) by Alec Jacobson and others
+- Inspired by existing ComfyUI 3D tools and workflows
+
+## Support
+
+- **Issues**: Report bugs or request features via GitHub Issues
+- **Discussions**: Join the discussion in GitHub Discussions
+- **Documentation**: See the [wiki](https://github.com/yourusername/ComfyUI-GeomPack/wiki) for detailed guides
+
+## Changelog
+
+### Version 0.2.0 (Current)
+- **Major Refactor**: Migrated from dictionary-based meshes to trimesh.Trimesh objects
+- **Added**: CGAL isotropic remeshing node
+- **Added**: Primitive creation (cube, sphere, plane)
+- **Enhanced**: Mesh Info now shows volume, watertight status, and more
+- **Improved**: File I/O with trimesh (supports more formats)
+- **Updated**: All nodes now use trimesh API
+- **Added**: Comprehensive test suite
+
+### Version 0.1.0
+- Initial MVP release
+- Basic node structure and boilerplate
+- Example nodes demonstrating functionality
diff --git a/__init__.py b/__init__.py
new file mode 100644
index 00000000..37a6253a
--- /dev/null
+++ b/__init__.py
@@ -0,0 +1,16 @@
+"""
+ComfyUI GeomPack - Geometry Processing Custom Nodes
+
+This package provides mesh processing nodes for ComfyUI using trimesh, CGAL, and Blender.
+Includes custom 3D preview widget powered by Three.js.
+"""
+
+from .nodes import NODE_CLASS_MAPPINGS, NODE_DISPLAY_NAME_MAPPINGS
+
+# Set web directory for JavaScript extensions (3D mesh preview widget)
+# This tells ComfyUI where to find our JavaScript files and HTML viewer
+# Files will be served at /extensions/ComfyUI-GeomPack/*
+WEB_DIRECTORY = "./web"
+
+# Export the mappings so ComfyUI can discover the nodes
+__all__ = ['NODE_CLASS_MAPPINGS', 'NODE_DISPLAY_NAME_MAPPINGS', 'WEB_DIRECTORY']
diff --git a/mesh_utils.py b/mesh_utils.py
new file mode 100644
index 00000000..6dd22b4f
--- /dev/null
+++ b/mesh_utils.py
@@ -0,0 +1,397 @@
+"""
+Mesh utilities for ComfyUI GeomPack nodes
+Handles mesh data structures, I/O, and processing using trimesh and seagullmesh (CGAL)
+"""
+
+import numpy as np
+import trimesh
+import igl
+import os
+from typing import Tuple, Optional
+
+# PyMeshLab for remeshing (TODO: will switch back to CGAL eventually)
+try:
+ import pymeshlab
+ PYMESHLAB_AVAILABLE = True
+except ImportError:
+ PYMESHLAB_AVAILABLE = False
+ print("[mesh_utils] Warning: pymeshlab not available. Install with: pip install pymeshlab")
+
+
+def load_mesh_file(file_path: str) -> Tuple[Optional[trimesh.Trimesh], str]:
+ """
+ Load a mesh from file.
+
+ Ensures the returned mesh has only triangular faces and is properly processed.
+
+ Args:
+ file_path: Path to mesh file (OBJ, PLY, STL, OFF, etc.)
+
+ Returns:
+ Tuple of (mesh, error_message)
+ """
+ if not os.path.exists(file_path):
+ return None, f"File not found: {file_path}"
+
+ try:
+ print(f"[load_mesh_file] Loading: {file_path}")
+
+ # Try to load with trimesh first (supports many formats)
+ loaded = trimesh.load(file_path, force='mesh')
+
+ print(f"[load_mesh_file] Loaded type: {type(loaded).__name__}")
+
+ # Handle case where trimesh.load returns a Scene instead of a mesh
+ if isinstance(loaded, trimesh.Scene):
+ print(f"[load_mesh_file] Converting Scene to single mesh (scene has {len(loaded.geometry)} geometries)")
+ # If it's a scene, dump it to a single mesh
+ mesh = loaded.dump(concatenate=True)
+ else:
+ mesh = loaded
+
+ if mesh is None or len(mesh.vertices) == 0 or len(mesh.faces) == 0:
+ return None, f"Failed to read mesh or mesh is empty: {file_path}"
+
+ print(f"[load_mesh_file] Initial mesh: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+
+ # Ensure mesh is properly triangulated
+ # Trimesh should handle this, but some file formats might have issues
+ if hasattr(mesh, 'faces') and len(mesh.faces) > 0:
+ # Check if faces are triangular
+ if mesh.faces.shape[1] != 3:
+ # Need to triangulate - this shouldn't normally happen but handle it
+ print(f"[load_mesh_file] Warning: Mesh has non-triangular faces, triangulating...")
+ # trimesh.Trimesh constructor should triangulate automatically with process=True
+ mesh = trimesh.Trimesh(vertices=mesh.vertices, faces=mesh.faces, process=True)
+ print(f"[load_mesh_file] After triangulation: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+
+ # Count before cleanup
+ verts_before = len(mesh.vertices)
+ faces_before = len(mesh.faces)
+
+ # Merge duplicate vertices and clean up
+ mesh.merge_vertices()
+ mesh.remove_duplicate_faces()
+ mesh.remove_degenerate_faces()
+
+ verts_after = len(mesh.vertices)
+ faces_after = len(mesh.faces)
+
+ if verts_before != verts_after or faces_before != faces_after:
+ print(f"[load_mesh_file] Cleanup: {verts_before}->{verts_after} vertices, {faces_before}->{faces_after} faces")
+ print(f"[load_mesh_file] Removed: {verts_before - verts_after} duplicate vertices, {faces_before - faces_after} bad faces")
+
+ # Store file metadata
+ mesh.metadata['file_path'] = file_path
+ mesh.metadata['file_name'] = os.path.basename(file_path)
+ mesh.metadata['file_format'] = os.path.splitext(file_path)[1].lower()
+
+ print(f"[load_mesh_file] ✓ Successfully loaded: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+ return mesh, ""
+
+ except Exception as e:
+ print(f"[load_mesh_file] Trimesh failed: {str(e)}, trying libigl fallback...")
+ # Fallback to libigl
+ try:
+ v, f = igl.read_triangle_mesh(file_path)
+ if v is None or f is None or len(v) == 0 or len(f) == 0:
+ return None, f"Failed to read mesh: {file_path}"
+
+ print(f"[load_mesh_file] libigl loaded: {len(v)} vertices, {len(f)} faces")
+
+ mesh = trimesh.Trimesh(vertices=v, faces=f, process=True)
+
+ # Count before cleanup
+ verts_before = len(mesh.vertices)
+ faces_before = len(mesh.faces)
+
+ # Clean up the mesh
+ mesh.merge_vertices()
+ mesh.remove_duplicate_faces()
+ mesh.remove_degenerate_faces()
+
+ verts_after = len(mesh.vertices)
+ faces_after = len(mesh.faces)
+
+ if verts_before != verts_after or faces_before != faces_after:
+ print(f"[load_mesh_file] Cleanup: {verts_before}->{verts_after} vertices, {faces_before}->{faces_after} faces")
+
+ # Store metadata
+ mesh.metadata['file_path'] = file_path
+ mesh.metadata['file_name'] = os.path.basename(file_path)
+ mesh.metadata['file_format'] = os.path.splitext(file_path)[1].lower()
+
+ print(f"[load_mesh_file] ✓ Successfully loaded via libigl: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+ return mesh, ""
+ except Exception as e2:
+ print(f"[load_mesh_file] ✗ Both loaders failed!")
+ return None, f"Error loading mesh: {str(e)}; Fallback error: {str(e2)}"
+
+
+def save_mesh_file(mesh: trimesh.Trimesh, file_path: str) -> Tuple[bool, str]:
+ """
+ Save a mesh to file.
+
+ Args:
+ mesh: Trimesh object
+ file_path: Output file path
+
+ Returns:
+ Tuple of (success, error_message)
+ """
+ if not isinstance(mesh, trimesh.Trimesh):
+ return False, "Input must be a trimesh.Trimesh object"
+
+ if len(mesh.vertices) == 0 or len(mesh.faces) == 0:
+ return False, "Mesh is empty"
+
+ try:
+ # Ensure output directory exists
+ output_dir = os.path.dirname(file_path)
+ if output_dir and not os.path.exists(output_dir):
+ os.makedirs(output_dir, exist_ok=True)
+
+ # Export the mesh
+ mesh.export(file_path)
+
+ return True, ""
+
+ except Exception as e:
+ return False, f"Error saving mesh: {str(e)}"
+
+
+def create_cube(size: float = 1.0) -> trimesh.Trimesh:
+ """
+ Create a cube mesh.
+
+ Args:
+ size: Side length of the cube
+
+ Returns:
+ Trimesh object
+ """
+ mesh = trimesh.creation.box(extents=[size, size, size])
+ mesh.metadata['primitive_type'] = 'cube'
+ mesh.metadata['size'] = size
+ return mesh
+
+
+def create_sphere(radius: float = 1.0, subdivisions: int = 2) -> trimesh.Trimesh:
+ """
+ Create a sphere mesh using icosphere subdivision.
+
+ Args:
+ radius: Radius of the sphere
+ subdivisions: Number of subdivision levels (0-4 recommended)
+
+ Returns:
+ Trimesh object
+ """
+ mesh = trimesh.creation.icosphere(subdivisions=subdivisions, radius=radius)
+ mesh.metadata['primitive_type'] = 'sphere'
+ mesh.metadata['radius'] = radius
+ mesh.metadata['subdivisions'] = subdivisions
+ return mesh
+
+
+def create_plane(size: float = 1.0, subdivisions: int = 1) -> trimesh.Trimesh:
+ """
+ Create a plane mesh.
+
+ Args:
+ size: Side length of the plane
+ subdivisions: Number of subdivisions per side
+
+ Returns:
+ Trimesh object
+ """
+ n = subdivisions + 1
+ s = size / 2.0
+
+ # Create grid of vertices
+ x = np.linspace(-s, s, n)
+ y = np.linspace(-s, s, n)
+ xx, yy = np.meshgrid(x, y)
+
+ vertices = np.stack([
+ xx.flatten(),
+ yy.flatten(),
+ np.zeros(n * n)
+ ], axis=1).astype(np.float64)
+
+ # Create faces
+ faces = []
+ for i in range(n - 1):
+ for j in range(n - 1):
+ idx = i * n + j
+ # Two triangles per quad
+ faces.append([idx, idx + n, idx + n + 1])
+ faces.append([idx, idx + n + 1, idx + 1])
+
+ faces = np.array(faces, dtype=np.int32)
+
+ mesh = trimesh.Trimesh(vertices=vertices, faces=faces)
+ mesh.metadata['primitive_type'] = 'plane'
+ mesh.metadata['size'] = size
+ mesh.metadata['subdivisions'] = subdivisions
+ return mesh
+
+
+def compute_mesh_info(mesh: trimesh.Trimesh) -> str:
+ """
+ Generate a formatted string with mesh information.
+
+ Args:
+ mesh: Trimesh object
+
+ Returns:
+ Formatted info string
+ """
+ if not isinstance(mesh, trimesh.Trimesh):
+ return "Error: Input must be a trimesh.Trimesh object"
+
+ info = "=== Mesh Information ===\n\n"
+ info += f"Vertices: {len(mesh.vertices):,}\n"
+ info += f"Faces: {len(mesh.faces):,}\n"
+ info += f"Edges: {len(mesh.edges):,}\n\n"
+
+ # Geometric properties
+ info += f"Volume: {mesh.volume:.6f}\n"
+ info += f"Surface Area: {mesh.area:.6f}\n"
+ info += f"Is Watertight: {mesh.is_watertight}\n"
+ info += f"Is Winding Consistent: {mesh.is_winding_consistent}\n\n"
+
+ # Bounding box
+ bounds = mesh.bounds
+ center = mesh.centroid
+ extents = mesh.extents
+
+ info += "Bounding Box:\n"
+ info += f" Min: [{bounds[0][0]:.3f}, {bounds[0][1]:.3f}, {bounds[0][2]:.3f}]\n"
+ info += f" Max: [{bounds[1][0]:.3f}, {bounds[1][1]:.3f}, {bounds[1][2]:.3f}]\n"
+ info += f" Center: [{center[0]:.3f}, {center[1]:.3f}, {center[2]:.3f}]\n"
+ info += f" Extents: [{extents[0]:.3f}, {extents[1]:.3f}, {extents[2]:.3f}]\n\n"
+
+ # Additional data
+ if hasattr(mesh.visual, 'vertex_colors') and mesh.visual.vertex_colors is not None:
+ info += f"Vertex Colors: Yes\n"
+
+ if mesh.vertex_normals is not None and len(mesh.vertex_normals) > 0:
+ info += f"Vertex Normals: Yes\n"
+
+ # Metadata
+ if mesh.metadata:
+ info += "\nMetadata:\n"
+ for key, value in mesh.metadata.items():
+ info += f" {key}: {value}\n"
+
+ return info
+
+
+# ============================================================================
+# Remeshing via PyMeshLab (TODO: will switch back to CGAL eventually)
+# ============================================================================
+
+def cgal_isotropic_remesh(
+ mesh: trimesh.Trimesh,
+ target_edge_length: float,
+ iterations: int = 3
+) -> Tuple[Optional[trimesh.Trimesh], str]:
+ """
+ Apply isotropic remeshing to create uniform triangle sizes.
+
+ Currently uses PyMeshLab. Will switch back to CGAL once CGAL Python bindings
+ issues are resolved.
+
+ Args:
+ mesh: Input trimesh object
+ target_edge_length: Target edge length for remeshed triangles
+ iterations: Number of remeshing iterations (default: 3)
+
+ Returns:
+ Tuple of (remeshed_mesh, error_message)
+ """
+ print(f"[cgal_isotropic_remesh] ===== Starting Isotropic Remeshing (via PyMeshLab) =====")
+ print(f"[cgal_isotropic_remesh] Input mesh: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+ print(f"[cgal_isotropic_remesh] Parameters:")
+ print(f"[cgal_isotropic_remesh] target_edge_length: {target_edge_length}")
+ print(f"[cgal_isotropic_remesh] iterations: {iterations}")
+
+ if not PYMESHLAB_AVAILABLE:
+ return None, "pymeshlab is not installed. Install with: pip install pymeshlab"
+
+ if not isinstance(mesh, trimesh.Trimesh):
+ return None, "Input must be a trimesh.Trimesh object"
+
+ if len(mesh.vertices) == 0 or len(mesh.faces) == 0:
+ return None, "Mesh is empty"
+
+ if target_edge_length <= 0:
+ return None, f"Target edge length must be positive, got {target_edge_length}"
+
+ if iterations < 1:
+ return None, f"Iterations must be at least 1, got {iterations}"
+
+ try:
+ # Convert trimesh to PyMeshLab
+ print(f"[cgal_isotropic_remesh] Converting to PyMeshLab format...")
+ ms = pymeshlab.MeshSet()
+
+ # Create PyMeshLab mesh from numpy arrays
+ pml_mesh = pymeshlab.Mesh(
+ vertex_matrix=mesh.vertices,
+ face_matrix=mesh.faces
+ )
+ ms.add_mesh(pml_mesh)
+
+ print(f"[cgal_isotropic_remesh] Applying isotropic remeshing...")
+ # PyMeshLab's isotropic remeshing
+ # targetlen is specified as PercentageValue (percentage of bounding box diagonal)
+ # We need to convert our absolute target_edge_length to a percentage
+ bbox_diag = np.linalg.norm(mesh.bounds[1] - mesh.bounds[0])
+ target_pct = (target_edge_length / bbox_diag) * 100.0
+
+ ms.meshing_isotropic_explicit_remeshing(
+ targetlen=pymeshlab.PercentageValue(target_pct),
+ iterations=iterations,
+ adaptive=False
+ )
+
+ # Convert back to trimesh
+ print(f"[cgal_isotropic_remesh] Converting back to trimesh...")
+ remeshed_pml = ms.current_mesh()
+ remeshed_mesh = trimesh.Trimesh(
+ vertices=remeshed_pml.vertex_matrix(),
+ faces=remeshed_pml.face_matrix()
+ )
+
+ # Preserve metadata
+ remeshed_mesh.metadata = mesh.metadata.copy()
+ remeshed_mesh.metadata['remeshing'] = {
+ 'algorithm': 'pymeshlab_isotropic',
+ 'target_edge_length': target_edge_length,
+ 'target_percentage': target_pct,
+ 'iterations': iterations,
+ 'original_vertices': len(mesh.vertices),
+ 'original_faces': len(mesh.faces),
+ 'remeshed_vertices': len(remeshed_mesh.vertices),
+ 'remeshed_faces': len(remeshed_mesh.faces)
+ }
+
+ # Calculate statistics
+ vertex_change = len(remeshed_mesh.vertices) - len(mesh.vertices)
+ face_change = len(remeshed_mesh.faces) - len(mesh.faces)
+ vertex_pct = (vertex_change / len(mesh.vertices)) * 100 if len(mesh.vertices) > 0 else 0
+ face_pct = (face_change / len(mesh.faces)) * 100 if len(mesh.faces) > 0 else 0
+
+ print(f"[cgal_isotropic_remesh] ===== Remeshing Complete =====")
+ print(f"[cgal_isotropic_remesh] Results:")
+ print(f"[cgal_isotropic_remesh] Vertices: {len(mesh.vertices)} -> {len(remeshed_mesh.vertices)} ({vertex_change:+d}, {vertex_pct:+.1f}%)")
+ print(f"[cgal_isotropic_remesh] Faces: {len(mesh.faces)} -> {len(remeshed_mesh.faces)} ({face_change:+d}, {face_pct:+.1f}%)")
+
+ return remeshed_mesh, ""
+
+ except Exception as e:
+ import traceback
+ traceback.print_exc()
+ return None, f"Error during remeshing: {str(e)}"
diff --git a/nodes.py b/nodes.py
new file mode 100644
index 00000000..8dc7231b
--- /dev/null
+++ b/nodes.py
@@ -0,0 +1,1081 @@
+"""
+ComfyUI GeomPack - Custom Nodes for Geometry Processing
+Now using trimesh and CGAL for enhanced mesh processing
+"""
+
+import numpy as np
+import trimesh
+import os
+import subprocess
+import tempfile
+import shutil
+from pathlib import Path
+
+# ComfyUI folder paths
+try:
+ import folder_paths
+ COMFYUI_INPUT_FOLDER = folder_paths.get_input_directory()
+ COMFYUI_OUTPUT_FOLDER = folder_paths.get_output_directory()
+except:
+ # Fallback if folder_paths not available (e.g., during testing)
+ COMFYUI_INPUT_FOLDER = None
+ COMFYUI_OUTPUT_FOLDER = None
+
+# Handle both relative and absolute imports
+try:
+ from . import mesh_utils
+except ImportError:
+ import mesh_utils
+
+
+def _find_blender():
+ """
+ Find Blender executable on the system.
+
+ Returns:
+ str: Path to Blender executable
+
+ Raises:
+ RuntimeError: If Blender not found
+ """
+ # Try common locations
+ common_paths = [
+ 'blender', # In PATH
+ '/Applications/Blender.app/Contents/MacOS/Blender', # macOS
+ 'C:\\Program Files\\Blender Foundation\\Blender\\blender.exe', # Windows
+ '/usr/bin/blender', # Linux
+ '/usr/local/bin/blender', # Linux
+ ]
+
+ for path in common_paths:
+ if shutil.which(path) or os.path.exists(path):
+ print(f"[Blender] Found Blender at: {path}")
+ return path
+
+ raise RuntimeError(
+ "Blender not found. Please install Blender and ensure it's in your PATH.\n"
+ "Download from: https://www.blender.org/download/"
+ )
+
+
+class ExampleLibiglNode:
+ """
+ Example node demonstrating the ComfyUI node structure.
+ This is a cookie-cutter template - replace with actual functionality.
+ """
+
+ def __init__(self):
+ pass
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ """
+ Define the input parameters for this node.
+
+ Returns:
+ dict: Input type definitions with 'required' and 'optional' keys
+ """
+ return {
+ "required": {
+ "text_input": ("STRING", {
+ "default": "Hello from GeomPack!",
+ "multiline": False
+ }),
+ "number_input": ("INT", {
+ "default": 10,
+ "min": 0,
+ "max": 100,
+ "step": 1
+ }),
+ "float_input": ("FLOAT", {
+ "default": 1.0,
+ "min": 0.0,
+ "max": 10.0,
+ "step": 0.1
+ }),
+ "mode": (["option1", "option2", "option3"], {
+ "default": "option1"
+ }),
+ },
+ "optional": {
+ "optional_input": ("STRING", {
+ "default": ""
+ }),
+ }
+ }
+
+ RETURN_TYPES = ("STRING", "INT", "FLOAT")
+ RETURN_NAMES = ("output_text", "output_number", "output_float")
+ FUNCTION = "execute"
+ CATEGORY = "geompack/examples"
+ OUTPUT_NODE = False
+
+ def execute(self, text_input, number_input, float_input, mode, optional_input=""):
+ """
+ Execute the node logic.
+
+ Args:
+ text_input: String input
+ number_input: Integer input
+ float_input: Float input
+ mode: Selected mode from combo box
+ optional_input: Optional string input
+
+ Returns:
+ tuple: (output_text, output_number, output_float)
+ """
+ # Example processing
+ result_text = f"{text_input} | Mode: {mode}"
+ if optional_input:
+ result_text += f" | Optional: {optional_input}"
+
+ result_number = number_input * 2
+ result_float = float_input * 1.5
+
+ print(f"[ExampleNode] Processing: {result_text}")
+
+ return (result_text, result_number, result_float)
+
+
+class MeshInfoNode:
+ """
+ Display detailed mesh information and statistics.
+ Now using trimesh for enhanced mesh analysis.
+ """
+
+ def __init__(self):
+ pass
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "mesh": ("MESH",),
+ },
+ }
+
+ RETURN_TYPES = ("STRING",)
+ RETURN_NAMES = ("info",)
+ FUNCTION = "get_mesh_info"
+ CATEGORY = "geompack/analysis"
+
+ def get_mesh_info(self, mesh):
+ """
+ Get information about the mesh.
+
+ Args:
+ mesh: trimesh.Trimesh object
+
+ Returns:
+ tuple: (info_string,)
+ """
+ info = mesh_utils.compute_mesh_info(mesh)
+ return (info,)
+
+
+class LoadMesh:
+ """
+ Load a mesh from file (OBJ, PLY, STL, OFF, etc.)
+ Now returns trimesh.Trimesh objects for better mesh handling.
+ """
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "file_path": ("STRING", {
+ "default": "",
+ "multiline": False
+ }),
+ },
+ }
+
+ RETURN_TYPES = ("MESH",)
+ RETURN_NAMES = ("mesh",)
+ FUNCTION = "load_mesh"
+ CATEGORY = "geompack/io"
+
+ def load_mesh(self, file_path):
+ """
+ Load mesh from file.
+
+ Looks for files in ComfyUI's input folder first, then tries absolute path.
+
+ Args:
+ file_path: Path to mesh file (relative to input folder or absolute)
+
+ Returns:
+ tuple: (trimesh.Trimesh,)
+ """
+ if not file_path or file_path.strip() == "":
+ raise ValueError("File path cannot be empty")
+
+ # Try to find the file
+ full_path = None
+
+ # First, try in ComfyUI input folder
+ if COMFYUI_INPUT_FOLDER is not None:
+ input_path = os.path.join(COMFYUI_INPUT_FOLDER, file_path)
+ if os.path.exists(input_path):
+ full_path = input_path
+ print(f"[LoadMesh] Found mesh in input folder: {file_path}")
+
+ # If not found in input folder, try as absolute path
+ if full_path is None:
+ if os.path.exists(file_path):
+ full_path = file_path
+ print(f"[LoadMesh] Loading from absolute path: {file_path}")
+ else:
+ # Try one more time with input folder prefix for better error message
+ if COMFYUI_INPUT_FOLDER is not None:
+ raise ValueError(
+ f"File not found: '{file_path}'\n"
+ f"Searched in:\n"
+ f" - ComfyUI input folder: {os.path.join(COMFYUI_INPUT_FOLDER, file_path)}\n"
+ f" - Absolute path: {file_path}"
+ )
+ else:
+ raise ValueError(f"File not found: {file_path}")
+
+ # Load the mesh
+ mesh, error = mesh_utils.load_mesh_file(full_path)
+
+ if mesh is None:
+ raise ValueError(f"Failed to load mesh: {error}")
+
+ print(f"[LoadMesh] Loaded: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+
+ return (mesh,)
+
+
+class SaveMesh:
+ """
+ Save a mesh to file (OBJ, PLY, STL, OFF, etc.)
+ Supports all formats provided by trimesh.
+ """
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "mesh": ("MESH",),
+ "file_path": ("STRING", {
+ "default": "output.obj",
+ "multiline": False
+ }),
+ },
+ }
+
+ RETURN_TYPES = ("STRING",)
+ RETURN_NAMES = ("status",)
+ FUNCTION = "save_mesh"
+ CATEGORY = "geompack/io"
+ OUTPUT_NODE = True
+
+ def save_mesh(self, mesh, file_path):
+ """
+ Save mesh to file.
+
+ Saves to ComfyUI's output folder if path is relative, otherwise uses absolute path.
+
+ Args:
+ mesh: trimesh.Trimesh object
+ file_path: Output file path (relative to output folder or absolute)
+
+ Returns:
+ tuple: (status_message,)
+ """
+ if not file_path or file_path.strip() == "":
+ raise ValueError("File path cannot be empty")
+
+ # Determine full output path
+ full_path = file_path
+
+ # If path is relative and we have output folder, use it
+ if not os.path.isabs(file_path) and COMFYUI_OUTPUT_FOLDER is not None:
+ full_path = os.path.join(COMFYUI_OUTPUT_FOLDER, file_path)
+ print(f"[SaveMesh] Saving to output folder: {file_path}")
+ else:
+ print(f"[SaveMesh] Saving to: {file_path}")
+
+ # Save the mesh
+ success, error = mesh_utils.save_mesh_file(mesh, full_path)
+
+ if not success:
+ raise ValueError(f"Failed to save mesh: {error}")
+
+ status = f"Successfully saved mesh to: {full_path}\n"
+ status += f" Vertices: {len(mesh.vertices)}\n"
+ status += f" Faces: {len(mesh.faces)}"
+
+ print(f"[SaveMesh] {status}")
+
+ return (status,)
+
+
+class CreatePrimitive:
+ """
+ Create primitive geometry (cube, sphere, plane)
+ Uses trimesh creation functions for high-quality primitives.
+ """
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "shape": (["cube", "sphere", "plane"], {
+ "default": "cube"
+ }),
+ "size": ("FLOAT", {
+ "default": 1.0,
+ "min": 0.01,
+ "max": 100.0,
+ "step": 0.1
+ }),
+ },
+ "optional": {
+ "subdivisions": ("INT", {
+ "default": 2,
+ "min": 0,
+ "max": 5,
+ "step": 1
+ }),
+ }
+ }
+
+ RETURN_TYPES = ("MESH",)
+ RETURN_NAMES = ("mesh",)
+ FUNCTION = "create_primitive"
+ CATEGORY = "geompack/primitives"
+
+ def create_primitive(self, shape, size, subdivisions=2):
+ """
+ Create a primitive mesh.
+
+ Args:
+ shape: Type of primitive (cube, sphere, plane)
+ size: Size of the primitive
+ subdivisions: Number of subdivisions (for sphere and plane)
+
+ Returns:
+ tuple: (trimesh.Trimesh,)
+ """
+ if shape == "cube":
+ mesh = mesh_utils.create_cube(size)
+ elif shape == "sphere":
+ mesh = mesh_utils.create_sphere(radius=size/2.0, subdivisions=subdivisions)
+ elif shape == "plane":
+ mesh = mesh_utils.create_plane(size=size, subdivisions=subdivisions)
+ else:
+ raise ValueError(f"Unknown shape: {shape}")
+
+ print(f"[CreatePrimitive] Created {shape}: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+
+ return (mesh,)
+
+
+class CGALRemeshNode:
+ """
+ CGAL Isotropic Remeshing - Create uniform triangle meshes.
+
+ Implements the algorithm from Botsch & Kobbelt (2004).
+ This remeshing technique creates triangles with target edge length,
+ resulting in more uniform mesh quality.
+ """
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "mesh": ("MESH",),
+ "target_edge_length": ("FLOAT", {
+ "default": 0.1,
+ "min": 0.001,
+ "max": 10.0,
+ "step": 0.01,
+ "display": "number"
+ }),
+ "iterations": ("INT", {
+ "default": 3,
+ "min": 1,
+ "max": 20,
+ "step": 1
+ }),
+ },
+ }
+
+ RETURN_TYPES = ("MESH",)
+ RETURN_NAMES = ("remeshed_mesh",)
+ FUNCTION = "remesh"
+ CATEGORY = "geompack/cgal"
+
+ def remesh(self, mesh, target_edge_length, iterations):
+ """
+ Apply CGAL isotropic remeshing.
+
+ Args:
+ mesh: Input trimesh.Trimesh object
+ target_edge_length: Target edge length for remeshed triangles
+ iterations: Number of remeshing iterations
+
+ Returns:
+ tuple: (remeshed_trimesh.Trimesh,)
+ """
+ print(f"[CGALRemesh] Input: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+ print(f"[CGALRemesh] Target edge length: {target_edge_length}, Iterations: {iterations}")
+
+ remeshed_mesh, error = mesh_utils.cgal_isotropic_remesh(
+ mesh,
+ target_edge_length,
+ iterations
+ )
+
+ if remeshed_mesh is None:
+ raise ValueError(f"Remeshing failed: {error}")
+
+ print(f"[CGALRemesh] Output: {len(remeshed_mesh.vertices)} vertices, {len(remeshed_mesh.faces)} faces")
+
+ return (remeshed_mesh,)
+
+
+class BlenderUVUnwrapNode:
+ """
+ UV Unwrap mesh using Blender's Smart UV Project.
+
+ This node uses Blender's advanced UV unwrapping algorithm to generate
+ UV coordinates for texturing. The mesh is exported with UV coordinates.
+ """
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "mesh": ("MESH",),
+ "angle_limit": ("FLOAT", {
+ "default": 66.0,
+ "min": 1.0,
+ "max": 89.0,
+ "step": 1.0,
+ "display": "number"
+ }),
+ "island_margin": ("FLOAT", {
+ "default": 0.02,
+ "min": 0.0,
+ "max": 1.0,
+ "step": 0.01,
+ "display": "number"
+ }),
+ },
+ }
+
+ RETURN_TYPES = ("MESH",)
+ RETURN_NAMES = ("unwrapped_mesh",)
+ FUNCTION = "uv_unwrap"
+ CATEGORY = "geompack/blender"
+
+ def uv_unwrap(self, mesh, angle_limit, island_margin):
+ """
+ UV unwrap mesh using Blender's Smart UV Project.
+
+ Args:
+ mesh: Input trimesh.Trimesh object
+ angle_limit: Angle threshold for creating seams (degrees)
+ island_margin: Spacing between UV islands (0-1)
+
+ Returns:
+ tuple: (unwrapped_trimesh.Trimesh,)
+ """
+ print(f"[BlenderUVUnwrap] Input: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+ print(f"[BlenderUVUnwrap] Parameters: angle_limit={angle_limit}°, island_margin={island_margin}")
+
+ # Find Blender
+ blender_path = _find_blender()
+
+ # Create temp files
+ with tempfile.NamedTemporaryFile(suffix='.obj', delete=False) as f_in:
+ input_path = f_in.name
+ mesh.export(input_path)
+
+ with tempfile.NamedTemporaryFile(suffix='.obj', delete=False) as f_out:
+ output_path = f_out.name
+
+ try:
+ # Blender script for UV unwrapping
+ script = f"""
+import bpy
+import math
+
+# Clear scene
+bpy.ops.object.select_all(action='SELECT')
+bpy.ops.object.delete()
+
+# Import mesh (OBJ preserves geometry)
+bpy.ops.wm.obj_import(filepath='{input_path}')
+
+# Get imported object
+obj = bpy.context.selected_objects[0]
+bpy.context.view_layer.objects.active = obj
+
+# Switch to edit mode and unwrap
+bpy.ops.object.mode_set(mode='EDIT')
+bpy.ops.mesh.select_all(action='SELECT')
+bpy.ops.uv.smart_project(
+ angle_limit={np.radians(angle_limit)},
+ island_margin={island_margin},
+ area_weight=0.0,
+ correct_aspect=True,
+ scale_to_bounds=False
+)
+bpy.ops.object.mode_set(mode='OBJECT')
+
+# Export with UVs
+bpy.ops.wm.obj_export(
+ filepath='{output_path}',
+ export_selected_objects=True,
+ export_uv=True,
+ export_materials=False
+)
+"""
+
+ print(f"[BlenderUVUnwrap] Running Blender in background mode...")
+ result = subprocess.run(
+ [blender_path, '--background', '--python-expr', script],
+ capture_output=True,
+ text=True,
+ timeout=300
+ )
+
+ if result.returncode != 0:
+ raise RuntimeError(f"Blender failed: {result.stderr}")
+
+ # Load the unwrapped mesh
+ print(f"[BlenderUVUnwrap] Loading unwrapped mesh...")
+ unwrapped = trimesh.load(output_path, process=False)
+
+ # If it's a scene, dump to single mesh
+ if isinstance(unwrapped, trimesh.Scene):
+ unwrapped = unwrapped.dump(concatenate=True)
+
+ # Preserve metadata
+ unwrapped.metadata = mesh.metadata.copy()
+ unwrapped.metadata['uv_unwrap'] = {
+ 'algorithm': 'blender_smart_uv',
+ 'angle_limit': angle_limit,
+ 'island_margin': island_margin
+ }
+
+ print(f"[BlenderUVUnwrap] ✓ Complete: {len(unwrapped.vertices)} vertices, {len(unwrapped.faces)} faces")
+
+ return (unwrapped,)
+
+ finally:
+ # Cleanup temp files
+ if os.path.exists(input_path):
+ os.unlink(input_path)
+ if os.path.exists(output_path):
+ os.unlink(output_path)
+
+
+class BlenderVoxelRemeshNode:
+ """
+ Voxel-based remeshing using Blender.
+
+ Creates a new mesh by voxelizing the input mesh and reconstructing
+ the surface. Good for creating uniform, watertight meshes.
+ """
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "mesh": ("MESH",),
+ "voxel_size": ("FLOAT", {
+ "default": 0.05,
+ "min": 0.001,
+ "max": 1.0,
+ "step": 0.01,
+ "display": "number"
+ }),
+ },
+ }
+
+ RETURN_TYPES = ("MESH",)
+ RETURN_NAMES = ("remeshed_mesh",)
+ FUNCTION = "voxel_remesh"
+ CATEGORY = "geompack/blender"
+
+ def voxel_remesh(self, mesh, voxel_size):
+ """
+ Apply voxel remeshing using Blender.
+
+ Args:
+ mesh: Input trimesh.Trimesh object
+ voxel_size: Voxel size for remeshing (smaller = higher resolution)
+
+ Returns:
+ tuple: (remeshed_trimesh.Trimesh,)
+ """
+ print(f"[BlenderVoxelRemesh] Input: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+ print(f"[BlenderVoxelRemesh] Voxel size: {voxel_size}")
+
+ # Find Blender
+ blender_path = _find_blender()
+
+ # Create temp files
+ with tempfile.NamedTemporaryFile(suffix='.obj', delete=False) as f_in:
+ input_path = f_in.name
+ mesh.export(input_path)
+
+ with tempfile.NamedTemporaryFile(suffix='.obj', delete=False) as f_out:
+ output_path = f_out.name
+
+ try:
+ # Blender script for voxel remeshing
+ script = f"""
+import bpy
+
+# Clear scene
+bpy.ops.object.select_all(action='SELECT')
+bpy.ops.object.delete()
+
+# Import mesh
+bpy.ops.wm.obj_import(filepath='{input_path}')
+
+# Get imported object
+obj = bpy.context.selected_objects[0]
+bpy.context.view_layer.objects.active = obj
+
+# Apply voxel remesh
+obj.data.remesh_voxel_size = {voxel_size}
+bpy.ops.object.voxel_remesh()
+
+# Export remeshed object
+bpy.ops.wm.obj_export(
+ filepath='{output_path}',
+ export_selected_objects=True,
+ export_uv=False,
+ export_materials=False
+)
+"""
+
+ print(f"[BlenderVoxelRemesh] Running Blender in background mode...")
+ result = subprocess.run(
+ [blender_path, '--background', '--python-expr', script],
+ capture_output=True,
+ text=True,
+ timeout=300
+ )
+
+ if result.returncode != 0:
+ raise RuntimeError(f"Blender failed: {result.stderr}")
+
+ # Load the remeshed mesh
+ print(f"[BlenderVoxelRemesh] Loading remeshed mesh...")
+ remeshed = trimesh.load(output_path, process=False)
+
+ # If it's a scene, dump to single mesh
+ if isinstance(remeshed, trimesh.Scene):
+ remeshed = remeshed.dump(concatenate=True)
+
+ # Preserve metadata
+ remeshed.metadata = mesh.metadata.copy()
+ remeshed.metadata['remeshing'] = {
+ 'algorithm': 'blender_voxel',
+ 'voxel_size': voxel_size,
+ 'original_vertices': len(mesh.vertices),
+ 'original_faces': len(mesh.faces),
+ 'remeshed_vertices': len(remeshed.vertices),
+ 'remeshed_faces': len(remeshed.faces)
+ }
+
+ vertex_change = len(remeshed.vertices) - len(mesh.vertices)
+ face_change = len(remeshed.faces) - len(mesh.faces)
+
+ print(f"[BlenderVoxelRemesh] ✓ Complete:")
+ print(f"[BlenderVoxelRemesh] Vertices: {len(mesh.vertices)} -> {len(remeshed.vertices)} ({vertex_change:+d})")
+ print(f"[BlenderVoxelRemesh] Faces: {len(mesh.faces)} -> {len(remeshed.faces)} ({face_change:+d})")
+
+ return (remeshed,)
+
+ finally:
+ # Cleanup temp files
+ if os.path.exists(input_path):
+ os.unlink(input_path)
+ if os.path.exists(output_path):
+ os.unlink(output_path)
+
+
+class PreviewMeshNode:
+ """
+ Preview mesh with interactive 3D viewer.
+
+ Displays mesh in an interactive Three.js viewer with orbit controls.
+ Allows rotating, panning, and zooming to inspect the mesh geometry.
+ """
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "mesh": ("MESH",),
+ },
+ }
+
+ RETURN_TYPES = ()
+ OUTPUT_NODE = True
+ FUNCTION = "preview_mesh"
+ CATEGORY = "geompack/visualization"
+
+ def preview_mesh(self, mesh):
+ """
+ Export mesh to GLB and prepare for 3D preview.
+
+ Args:
+ mesh: Input trimesh.Trimesh object
+
+ Returns:
+ dict: UI data for frontend widget
+ """
+ import uuid
+
+ print(f"[PreviewMesh] Preparing preview: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+
+ # Generate unique filename
+ filename = f"preview_{uuid.uuid4().hex[:8]}.glb"
+
+ # Use ComfyUI's output directory
+ if COMFYUI_OUTPUT_FOLDER:
+ filepath = os.path.join(COMFYUI_OUTPUT_FOLDER, filename)
+ else:
+ filepath = os.path.join(tempfile.gettempdir(), filename)
+
+ # Export to GLB (best format for Three.js)
+ try:
+ mesh.export(filepath, file_type='glb')
+ print(f"[PreviewMesh] Exported to: {filepath}")
+ except Exception as e:
+ print(f"[PreviewMesh] Export failed: {e}")
+ # Fallback to OBJ
+ filename = filename.replace('.glb', '.obj')
+ filepath = filepath.replace('.glb', '.obj')
+ mesh.export(filepath, file_type='obj')
+ print(f"[PreviewMesh] Exported to OBJ: {filepath}")
+
+ # Calculate bounding box info for camera setup
+ bounds = mesh.bounds
+ extents = mesh.extents
+ max_extent = max(extents)
+
+ # Return metadata for frontend widget
+ return {
+ "ui": {
+ "mesh_file": [filename],
+ "vertex_count": [len(mesh.vertices)],
+ "face_count": [len(mesh.faces)],
+ "bounds_min": [bounds[0].tolist()],
+ "bounds_max": [bounds[1].tolist()],
+ "extents": [extents.tolist()],
+ "max_extent": [float(max_extent)],
+ }
+ }
+
+
+class PreviewMeshVTKNode:
+ """
+ Preview mesh with VTK.js scientific visualization viewer.
+
+ Displays mesh in an interactive VTK.js viewer with trackball controls.
+ Better for scientific visualization, mesh analysis, and large datasets.
+ """
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "mesh": ("MESH",),
+ },
+ }
+
+ RETURN_TYPES = ()
+ OUTPUT_NODE = True
+ FUNCTION = "preview_mesh_vtk"
+ CATEGORY = "geompack/visualization"
+
+ def preview_mesh_vtk(self, mesh):
+ """
+ Export mesh to STL and prepare for VTK.js preview.
+
+ Args:
+ mesh: Input trimesh.Trimesh object
+
+ Returns:
+ dict: UI data for frontend widget
+ """
+ import uuid
+
+ print(f"[PreviewMeshVTK] Preparing preview: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+
+ # Generate unique filename
+ filename = f"preview_vtk_{uuid.uuid4().hex[:8]}.stl"
+
+ # Use ComfyUI's output directory
+ if COMFYUI_OUTPUT_FOLDER:
+ filepath = os.path.join(COMFYUI_OUTPUT_FOLDER, filename)
+ else:
+ filepath = os.path.join(tempfile.gettempdir(), filename)
+
+ # Export to STL (native format for VTK.js)
+ try:
+ mesh.export(filepath, file_type='stl')
+ print(f"[PreviewMeshVTK] Exported to: {filepath}")
+ except Exception as e:
+ print(f"[PreviewMeshVTK] Export failed: {e}")
+ # Fallback to OBJ
+ filename = filename.replace('.stl', '.obj')
+ filepath = filepath.replace('.stl', '.obj')
+ mesh.export(filepath, file_type='obj')
+ print(f"[PreviewMeshVTK] Exported to OBJ: {filepath}")
+
+ # Calculate bounding box info for camera setup
+ bounds = mesh.bounds
+ extents = mesh.extents
+ max_extent = max(extents)
+
+ # Return metadata for frontend widget
+ return {
+ "ui": {
+ "mesh_file": [filename],
+ "vertex_count": [len(mesh.vertices)],
+ "face_count": [len(mesh.faces)],
+ "bounds_min": [bounds[0].tolist()],
+ "bounds_max": [bounds[1].tolist()],
+ "extents": [extents.tolist()],
+ "max_extent": [float(max_extent)],
+ }
+ }
+
+
+class CenterMeshNode:
+ """
+ Center mesh at origin (0, 0, 0).
+
+ Uses bounding box center to translate the mesh so its center
+ is at the world origin. Useful for preparing meshes for export
+ or ensuring consistent positioning.
+ """
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "mesh": ("MESH",),
+ },
+ }
+
+ RETURN_TYPES = ("MESH",)
+ RETURN_NAMES = ("centered_mesh",)
+ FUNCTION = "center_mesh"
+ CATEGORY = "geompack/transforms"
+
+ def center_mesh(self, mesh):
+ """
+ Center mesh at origin using bounding box center.
+
+ Args:
+ mesh: Input trimesh.Trimesh object
+
+ Returns:
+ tuple: (centered_trimesh.Trimesh,)
+ """
+ print(f"[CenterMesh] Input: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+
+ # Calculate bounding box center
+ bounds_center = (mesh.bounds[0] + mesh.bounds[1]) / 2.0
+
+ print(f"[CenterMesh] Original center: [{bounds_center[0]:.3f}, {bounds_center[1]:.3f}, {bounds_center[2]:.3f}]")
+
+ # Apply translation to center at origin
+ mesh_centered = mesh.copy()
+ mesh_centered.apply_translation(-bounds_center)
+
+ # Verify centering
+ new_center = (mesh_centered.bounds[0] + mesh_centered.bounds[1]) / 2.0
+ print(f"[CenterMesh] New center: [{new_center[0]:.3f}, {new_center[1]:.3f}, {new_center[2]:.3f}]")
+
+ # Preserve metadata
+ mesh_centered.metadata = mesh.metadata.copy()
+ mesh_centered.metadata['centered'] = True
+ mesh_centered.metadata['original_center'] = bounds_center.tolist()
+
+ return (mesh_centered,)
+
+
+class BlenderQuadriflowRemeshNode:
+ """
+ Quadriflow remeshing using Blender.
+
+ Creates a quad-dominant mesh with good topology. Better for animation
+ and subdivision surfaces than triangle-based remeshing.
+ """
+
+ @classmethod
+ def INPUT_TYPES(cls):
+ return {
+ "required": {
+ "mesh": ("MESH",),
+ "target_face_count": ("INT", {
+ "default": 5000,
+ "min": 100,
+ "max": 100000,
+ "step": 100
+ }),
+ },
+ }
+
+ RETURN_TYPES = ("MESH",)
+ RETURN_NAMES = ("remeshed_mesh",)
+ FUNCTION = "quadriflow_remesh"
+ CATEGORY = "geompack/blender"
+
+ def quadriflow_remesh(self, mesh, target_face_count):
+ """
+ Apply Quadriflow remeshing using Blender.
+
+ Args:
+ mesh: Input trimesh.Trimesh object
+ target_face_count: Target number of faces in output mesh
+
+ Returns:
+ tuple: (remeshed_trimesh.Trimesh,)
+ """
+ print(f"[BlenderQuadriflow] Input: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+ print(f"[BlenderQuadriflow] Target face count: {target_face_count}")
+
+ # Find Blender
+ blender_path = _find_blender()
+
+ # Create temp files
+ with tempfile.NamedTemporaryFile(suffix='.obj', delete=False) as f_in:
+ input_path = f_in.name
+ mesh.export(input_path)
+
+ with tempfile.NamedTemporaryFile(suffix='.obj', delete=False) as f_out:
+ output_path = f_out.name
+
+ try:
+ # Blender script for Quadriflow remeshing
+ script = f"""
+import bpy
+
+# Clear scene
+bpy.ops.object.select_all(action='SELECT')
+bpy.ops.object.delete()
+
+# Import mesh
+bpy.ops.wm.obj_import(filepath='{input_path}')
+
+# Get imported object
+obj = bpy.context.selected_objects[0]
+bpy.context.view_layer.objects.active = obj
+
+# Apply Quadriflow remesh
+# Note: Different Blender versions have different parameters
+# Using minimal set for maximum compatibility
+bpy.ops.object.quadriflow_remesh(
+ use_mesh_symmetry=False,
+ use_preserve_sharp=False,
+ use_preserve_boundary=False,
+ smooth_normals=False,
+ mode='FACES',
+ target_faces={target_face_count},
+ seed=0
+)
+
+# Export remeshed object
+bpy.ops.wm.obj_export(
+ filepath='{output_path}',
+ export_selected_objects=True,
+ export_uv=False,
+ export_materials=False
+)
+"""
+
+ print(f"[BlenderQuadriflow] Running Blender in background mode...")
+ result = subprocess.run(
+ [blender_path, '--background', '--python-expr', script],
+ capture_output=True,
+ text=True,
+ timeout=300
+ )
+
+ if result.returncode != 0:
+ raise RuntimeError(f"Blender failed: {result.stderr}")
+
+ # Load the remeshed mesh
+ print(f"[BlenderQuadriflow] Loading remeshed mesh...")
+ remeshed = trimesh.load(output_path, process=False)
+
+ # If it's a scene, dump to single mesh
+ if isinstance(remeshed, trimesh.Scene):
+ remeshed = remeshed.dump(concatenate=True)
+
+ # Quadriflow produces quads, but trimesh will triangulate them
+ # Preserve metadata
+ remeshed.metadata = mesh.metadata.copy()
+ remeshed.metadata['remeshing'] = {
+ 'algorithm': 'blender_quadriflow',
+ 'target_face_count': target_face_count,
+ 'original_vertices': len(mesh.vertices),
+ 'original_faces': len(mesh.faces),
+ 'remeshed_vertices': len(remeshed.vertices),
+ 'remeshed_faces': len(remeshed.faces)
+ }
+
+ vertex_change = len(remeshed.vertices) - len(mesh.vertices)
+ face_change = len(remeshed.faces) - len(mesh.faces)
+
+ print(f"[BlenderQuadriflow] ✓ Complete:")
+ print(f"[BlenderQuadriflow] Vertices: {len(mesh.vertices)} -> {len(remeshed.vertices)} ({vertex_change:+d})")
+ print(f"[BlenderQuadriflow] Faces: {len(mesh.faces)} -> {len(remeshed.faces)} ({face_change:+d})")
+
+ return (remeshed,)
+
+ finally:
+ # Cleanup temp files
+ if os.path.exists(input_path):
+ os.unlink(input_path)
+ if os.path.exists(output_path):
+ os.unlink(output_path)
+
+
+# Node class mappings - this dictionary maps internal node names to classes
+NODE_CLASS_MAPPINGS = {
+ "GeomPackExampleNode": ExampleLibiglNode,
+ "GeomPackMeshInfo": MeshInfoNode,
+ "GeomPackLoadMesh": LoadMesh,
+ "GeomPackSaveMesh": SaveMesh,
+ "GeomPackCreatePrimitive": CreatePrimitive,
+ "GeomPackCGALRemesh": CGALRemeshNode,
+ "GeomPackCenterMesh": CenterMeshNode,
+ "GeomPackPreviewMesh": PreviewMeshNode,
+ "GeomPackPreviewMeshVTK": PreviewMeshVTKNode,
+ "GeomPackBlenderUVUnwrap": BlenderUVUnwrapNode,
+ "GeomPackBlenderVoxelRemesh": BlenderVoxelRemeshNode,
+ "GeomPackBlenderQuadriflowRemesh": BlenderQuadriflowRemeshNode,
+}
+
+# Display name mappings - these are the names shown in ComfyUI's node browser
+NODE_DISPLAY_NAME_MAPPINGS = {
+ "GeomPackExampleNode": "Example Node",
+ "GeomPackMeshInfo": "Mesh Info",
+ "GeomPackLoadMesh": "Load Mesh",
+ "GeomPackSaveMesh": "Save Mesh",
+ "GeomPackCreatePrimitive": "Create Primitive",
+ "GeomPackCGALRemesh": "CGAL Remesh (Isotropic)",
+ "GeomPackCenterMesh": "Center Mesh",
+ "GeomPackPreviewMesh": "Preview Mesh (3D)",
+ "GeomPackPreviewMeshVTK": "Preview Mesh (VTK)",
+ "GeomPackBlenderUVUnwrap": "Blender UV Unwrap",
+ "GeomPackBlenderVoxelRemesh": "Blender Voxel Remesh",
+ "GeomPackBlenderQuadriflowRemesh": "Blender Quadriflow Remesh",
+}
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 00000000..3c1e6148
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,25 @@
+[project]
+name = "comfyui-libigl"
+description = "libigl geometry processing wrapper for ComfyUI - mesh manipulation and analysis nodes"
+version = "0.1.0"
+license = { file = "LICENSE" }
+dependencies = [
+ "libigl>=2.6.1",
+ "numpy>=1.21.0",
+ "scipy>=1.7.0",
+ "matplotlib>=3.5.0",
+ "Pillow>=9.0.0"
+]
+
+[project.urls]
+Repository = "https://github.com/yourusername/ComfyUI-libigl"
+Documentation = "https://github.com/yourusername/ComfyUI-libigl/blob/main/README.md"
+
+[tool.comfy]
+PublisherId = "your-publisher-id"
+DisplayName = "ComfyUI libigl"
+Icon = ""
+
+[build-system]
+requires = ["setuptools>=45", "wheel"]
+build-backend = "setuptools.build_meta"
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 00000000..82c32d8b
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,10 @@
+# Core dependencies
+libigl>=2.6.1
+numpy>=1.21.0
+scipy>=1.7.0
+trimesh>=3.15.0
+pymeshlab>=2022.2
+
+# Visualization
+matplotlib>=3.5.0
+Pillow>=9.0.0
diff --git a/test_nodes.py b/test_nodes.py
new file mode 100644
index 00000000..ef96a629
--- /dev/null
+++ b/test_nodes.py
@@ -0,0 +1,188 @@
+"""
+Test script to verify the GeomPack nodes work correctly
+Now testing with trimesh and CGAL functionality
+"""
+
+import sys
+import os
+
+# Add current directory to path for imports
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+
+import numpy as np
+import trimesh
+from nodes import CreatePrimitive, SaveMesh, LoadMesh, MeshInfoNode, CGALRemeshNode
+
+
+def test_create_primitive():
+ """Test creating primitive shapes"""
+ print("=" * 60)
+ print("TEST 1: Create Primitive")
+ print("=" * 60)
+
+ node = CreatePrimitive()
+
+ # Test cube
+ print("\n[1/3] Testing cube creation...")
+ mesh, = node.create_primitive("cube", 2.0, subdivisions=0)
+ assert isinstance(mesh, trimesh.Trimesh), "Mesh should be a trimesh.Trimesh object"
+ print(f"✓ Cube created: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+ assert len(mesh.vertices) == 8, "Cube should have 8 vertices"
+ assert len(mesh.faces) == 12, "Cube should have 12 faces"
+
+ # Test sphere
+ print("\n[2/3] Testing sphere creation...")
+ mesh, = node.create_primitive("sphere", 1.0, subdivisions=2)
+ assert isinstance(mesh, trimesh.Trimesh), "Mesh should be a trimesh.Trimesh object"
+ print(f"✓ Sphere created: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+ assert len(mesh.vertices) > 0, "Sphere should have vertices"
+ assert len(mesh.faces) > 0, "Sphere should have faces"
+ assert mesh.is_watertight, "Sphere should be watertight"
+
+ # Test plane
+ print("\n[3/3] Testing plane creation...")
+ mesh, = node.create_primitive("plane", 1.0, subdivisions=3)
+ assert isinstance(mesh, trimesh.Trimesh), "Mesh should be a trimesh.Trimesh object"
+ print(f"✓ Plane created: {len(mesh.vertices)} vertices, {len(mesh.faces)} faces")
+ assert len(mesh.vertices) == 16, "Plane with 3 subdivisions should have 16 vertices"
+
+ print("\n✅ All primitive creation tests passed!")
+ return mesh
+
+
+def test_save_and_load(mesh):
+ """Test saving and loading mesh"""
+ print("\n" + "=" * 60)
+ print("TEST 2: Save and Load Mesh")
+ print("=" * 60)
+
+ # Save mesh
+ print("\n[1/2] Testing mesh save...")
+ save_node = SaveMesh()
+ test_file = "/tmp/test_mesh.obj"
+ status, = save_node.save_mesh(mesh, test_file)
+ print(f"✓ Mesh saved to {test_file}")
+ print(f" Status: {status}")
+
+ # Load mesh
+ print("\n[2/2] Testing mesh load...")
+ load_node = LoadMesh()
+ loaded_mesh, = load_node.load_mesh(test_file)
+ assert isinstance(loaded_mesh, trimesh.Trimesh), "Loaded mesh should be a trimesh.Trimesh object"
+ print(f"✓ Mesh loaded from {test_file}")
+ print(f" Vertices: {len(loaded_mesh.vertices)}")
+ print(f" Faces: {len(loaded_mesh.faces)}")
+
+ # Verify
+ assert len(loaded_mesh.vertices) == len(mesh.vertices), "Vertex count should match"
+ assert len(loaded_mesh.faces) == len(mesh.faces), "Face count should match"
+
+ print("\n✅ Save/Load test passed!")
+ return loaded_mesh
+
+
+def test_mesh_info(mesh):
+ """Test mesh info node"""
+ print("\n" + "=" * 60)
+ print("TEST 3: Mesh Info")
+ print("=" * 60)
+
+ info_node = MeshInfoNode()
+ info, = info_node.get_mesh_info(mesh)
+
+ print("\n" + info)
+ assert "Vertices:" in info, "Info should contain vertex count"
+ assert "Faces:" in info, "Info should contain face count"
+ assert "Volume:" in info, "Info should contain volume"
+ assert "Is Watertight:" in info, "Info should contain watertight status"
+
+ print("\n✅ Mesh info test passed!")
+
+
+def test_cgal_remeshing():
+ """Test CGAL remeshing node"""
+ print("\n" + "=" * 60)
+ print("TEST 4: CGAL Isotropic Remeshing")
+ print("=" * 60)
+
+ # Create a test mesh (cube)
+ print("\n[1/3] Creating test cube...")
+ create_node = CreatePrimitive()
+ mesh, = create_node.create_primitive("cube", 1.0, subdivisions=0)
+ original_vertices = len(mesh.vertices)
+ original_faces = len(mesh.faces)
+ print(f"✓ Original mesh: {original_vertices} vertices, {original_faces} faces")
+
+ # Apply remeshing
+ print("\n[2/3] Applying CGAL remeshing...")
+ remesh_node = CGALRemeshNode()
+ remeshed_mesh, = remesh_node.remesh(mesh, target_edge_length=0.15, iterations=3)
+ assert isinstance(remeshed_mesh, trimesh.Trimesh), "Remeshed mesh should be a trimesh.Trimesh object"
+ print(f"✓ Remeshed mesh: {len(remeshed_mesh.vertices)} vertices, {len(remeshed_mesh.faces)} faces")
+
+ # Verify remeshing worked
+ print("\n[3/3] Verifying remeshing results...")
+ assert len(remeshed_mesh.vertices) > original_vertices, "Remeshing should increase vertex count"
+ assert len(remeshed_mesh.faces) > original_faces, "Remeshing should increase face count"
+ assert remeshed_mesh.is_watertight, "Remeshed mesh should be watertight"
+
+ # Check that volume is approximately preserved
+ volume_diff = abs(remeshed_mesh.volume - mesh.volume)
+ volume_error = volume_diff / mesh.volume
+ print(f" Original volume: {mesh.volume:.6f}")
+ print(f" Remeshed volume: {remeshed_mesh.volume:.6f}")
+ print(f" Volume error: {volume_error*100:.2f}%")
+ assert volume_error < 0.05, f"Volume should be approximately preserved (error: {volume_error*100:.2f}%)"
+
+ print("\n✅ CGAL remeshing test passed!")
+ return remeshed_mesh
+
+
+def main():
+ """Run all tests"""
+ print("\n" + "=" * 60)
+ print("ComfyUI GeomPack Node Tests")
+ print("=" * 60)
+
+ try:
+ # Test 1: Create primitives
+ mesh = test_create_primitive()
+
+ # Test 2: Save and load
+ loaded_mesh = test_save_and_load(mesh)
+
+ # Test 3: Mesh info
+ test_mesh_info(loaded_mesh)
+
+ # Test 4: CGAL remeshing
+ remeshed_mesh = test_cgal_remeshing()
+
+ # Summary
+ print("\n" + "=" * 60)
+ print("🎉 ALL TESTS PASSED!")
+ print("=" * 60)
+ print("\nThe following nodes are working correctly:")
+ print(" ✓ CreatePrimitive (cube, sphere, plane)")
+ print(" ✓ SaveMesh (OBJ format)")
+ print(" ✓ LoadMesh (OBJ format)")
+ print(" ✓ MeshInfoNode (with trimesh enhancements)")
+ print(" ✓ CGALRemeshNode (isotropic remeshing)")
+ print("\nYou can now use these nodes in ComfyUI!")
+ print("=" * 60)
+
+ except Exception as e:
+ print("\n" + "=" * 60)
+ print("❌ TEST FAILED!")
+ print("=" * 60)
+ print(f"Error: {e}")
+ import traceback
+ traceback.print_exc()
+ return False
+
+ return True
+
+
+if __name__ == "__main__":
+ import sys
+ success = main()
+ sys.exit(0 if success else 1)
diff --git a/web/js/mesh_preview.js b/web/js/mesh_preview.js
new file mode 100644
index 00000000..b0db42bb
--- /dev/null
+++ b/web/js/mesh_preview.js
@@ -0,0 +1,78 @@
+/**
+ * ComfyUI GeomPack - 3D Mesh Preview Widget
+ * Minimal implementation based on ComfyUI-3D-Pack pattern
+ */
+
+import { app } from "../../../scripts/app.js";
+
+console.log("[GeomPack] Loading mesh preview extension...");
+
+app.registerExtension({
+ name: "geompack.meshpreview",
+
+ async beforeRegisterNodeDef(nodeType, nodeData, app) {
+ if (nodeData.name === "GeomPackPreviewMesh") {
+ console.log("[GeomPack] Registering Preview Mesh node");
+
+ const onNodeCreated = nodeType.prototype.onNodeCreated;
+ nodeType.prototype.onNodeCreated = function() {
+ const r = onNodeCreated ? onNodeCreated.apply(this, arguments) : undefined;
+
+ console.log("[GeomPack] Node created, adding widget");
+
+ // Create iframe for 3D viewer
+ const iframe = document.createElement("iframe");
+ iframe.style.width = "100%";
+ iframe.style.height = "500px";
+ iframe.style.border = "none";
+ iframe.style.backgroundColor = "#2a2a2a";
+
+ // Point to our HTML viewer (with cache buster)
+ iframe.src = "/extensions/ComfyUI-GeomPack/viewer.html?v=" + Date.now();
+
+ // Add widget
+ const widget = this.addDOMWidget("preview", "MESH_PREVIEW", iframe);
+ widget.computeSize = () => [512, 520];
+
+ // Store iframe reference
+ this.meshViewerIframe = iframe;
+
+ // Handle execution
+ const onExecuted = this.onExecuted;
+ this.onExecuted = function(message) {
+ console.log("[GeomPack] onExecuted called with message:", message);
+ onExecuted?.apply(this, arguments);
+
+ // The message IS the UI data (not message.ui)
+ if (message?.mesh_file && message.mesh_file[0]) {
+ const filename = message.mesh_file[0];
+ console.log(`[GeomPack] Loading mesh: ${filename}`);
+
+ // ComfyUI serves output files via /view API endpoint
+ const filepath = `/view?filename=${encodeURIComponent(filename)}&type=output&subfolder=`;
+
+ // Send message to iframe (with delay to ensure iframe is loaded)
+ setTimeout(() => {
+ if (iframe.contentWindow) {
+ console.log(`[GeomPack] Sending postMessage to iframe: ${filepath}`);
+ iframe.contentWindow.postMessage({
+ type: "LOAD_MESH",
+ filepath: filepath,
+ timestamp: Date.now()
+ }, "*");
+ } else {
+ console.error("[GeomPack] Iframe contentWindow not available");
+ }
+ }, 100);
+ } else {
+ console.log("[GeomPack] No mesh_file in message data. Keys:", Object.keys(message || {}));
+ }
+ };
+
+ return r;
+ };
+ }
+ }
+});
+
+console.log("[GeomPack] Mesh preview extension registered");
diff --git a/web/js/mesh_preview_vtk.js b/web/js/mesh_preview_vtk.js
new file mode 100644
index 00000000..78d82005
--- /dev/null
+++ b/web/js/mesh_preview_vtk.js
@@ -0,0 +1,78 @@
+/**
+ * ComfyUI GeomPack - VTK.js Mesh Preview Widget
+ * Scientific visualization with VTK.js
+ */
+
+import { app } from "../../../scripts/app.js";
+
+console.log("[GeomPack] Loading VTK.js mesh preview extension...");
+
+app.registerExtension({
+ name: "geompack.meshpreview.vtk",
+
+ async beforeRegisterNodeDef(nodeType, nodeData, app) {
+ if (nodeData.name === "GeomPackPreviewMeshVTK") {
+ console.log("[GeomPack] Registering Preview Mesh (VTK) node");
+
+ const onNodeCreated = nodeType.prototype.onNodeCreated;
+ nodeType.prototype.onNodeCreated = function() {
+ const r = onNodeCreated ? onNodeCreated.apply(this, arguments) : undefined;
+
+ console.log("[GeomPack] VTK node created, adding widget");
+
+ // Create iframe for VTK.js viewer
+ const iframe = document.createElement("iframe");
+ iframe.style.width = "100%";
+ iframe.style.height = "500px";
+ iframe.style.border = "none";
+ iframe.style.backgroundColor = "#2a2a2a";
+
+ // Point to VTK.js HTML viewer (with cache buster)
+ iframe.src = "/extensions/ComfyUI-GeomPack/viewer_vtk.html?v=" + Date.now();
+
+ // Add widget
+ const widget = this.addDOMWidget("preview_vtk", "MESH_PREVIEW_VTK", iframe);
+ widget.computeSize = () => [512, 520];
+
+ // Store iframe reference
+ this.meshViewerIframeVTK = iframe;
+
+ // Handle execution
+ const onExecuted = this.onExecuted;
+ this.onExecuted = function(message) {
+ console.log("[GeomPack VTK] onExecuted called with message:", message);
+ onExecuted?.apply(this, arguments);
+
+ // The message IS the UI data (not message.ui)
+ if (message?.mesh_file && message.mesh_file[0]) {
+ const filename = message.mesh_file[0];
+ console.log(`[GeomPack VTK] Loading mesh: ${filename}`);
+
+ // ComfyUI serves output files via /view API endpoint
+ const filepath = `/view?filename=${encodeURIComponent(filename)}&type=output&subfolder=`;
+
+ // Send message to iframe (with delay to ensure iframe is loaded)
+ setTimeout(() => {
+ if (iframe.contentWindow) {
+ console.log(`[GeomPack VTK] Sending postMessage to iframe: ${filepath}`);
+ iframe.contentWindow.postMessage({
+ type: "LOAD_MESH",
+ filepath: filepath,
+ timestamp: Date.now()
+ }, "*");
+ } else {
+ console.error("[GeomPack VTK] Iframe contentWindow not available");
+ }
+ }, 100);
+ } else {
+ console.log("[GeomPack VTK] No mesh_file in message data. Keys:", Object.keys(message || {}));
+ }
+ };
+
+ return r;
+ };
+ }
+ }
+});
+
+console.log("[GeomPack] VTK.js mesh preview extension registered");
diff --git a/web/viewer.html b/web/viewer.html
new file mode 100644
index 00000000..95fcd148
--- /dev/null
+++ b/web/viewer.html
@@ -0,0 +1,187 @@
+
+
+
+
+ GeomPack 3D Viewer
+
+
+
+
+ Ready to load mesh
+
+
+
+
+
+
diff --git a/web/viewer_vtk.html b/web/viewer_vtk.html
new file mode 100644
index 00000000..eed00c5d
--- /dev/null
+++ b/web/viewer_vtk.html
@@ -0,0 +1,170 @@
+
+
+
+
+ GeomPack VTK.js Viewer
+
+
+
+
+ Ready to load mesh
+
+
+
+
+
+
diff --git a/workflows/bunnyremesh_api.json b/workflows/bunnyremesh_api.json
new file mode 100644
index 00000000..f1db963b
--- /dev/null
+++ b/workflows/bunnyremesh_api.json
@@ -0,0 +1,51 @@
+{
+ "3": {
+ "inputs": {
+ "file_path": "bunny.stl"
+ },
+ "class_type": "GeomPackLoadMesh",
+ "_meta": {
+ "title": "Load Mesh"
+ }
+ },
+ "4": {
+ "inputs": {
+ "model_file": [
+ "5",
+ 0
+ ],
+ "image": ""
+ },
+ "class_type": "Preview3D",
+ "_meta": {
+ "title": "Preview 3D"
+ }
+ },
+ "5": {
+ "inputs": {
+ "file_path": "output.obj",
+ "mesh": [
+ "6",
+ 0
+ ]
+ },
+ "class_type": "GeomPackSaveMesh",
+ "_meta": {
+ "title": "Save Mesh"
+ }
+ },
+ "6": {
+ "inputs": {
+ "target_edge_length": 0.1,
+ "iterations": 3,
+ "mesh": [
+ "3",
+ 0
+ ]
+ },
+ "class_type": "GeomPackCGALRemesh",
+ "_meta": {
+ "title": "CGAL Remesh (Isotropic)"
+ }
+ }
+}
\ No newline at end of file