meshlite

A desktop 3D mesh processing application with a VSCode-inspired interface, powered by MeshLib, moderngl, and Dear ImGui.

Features

15 mesh operations with full parameter control:

Professional UI:

• MeshInspector-style top toolbar with grouped icon buttons
• Activity bar + collapsible sidebar (Outliner, Operations, Search, Settings)
• Properties panel with auto-rendered parameter widgets
• Command palette with fuzzy search (Ctrl+Shift+P)
• Mesh Info panel with topology, geometry, and bounding box statistics
• Snapshot-based undo/redo (Ctrl+Z / Ctrl+Shift+Z)
• VSCode "Dark+" theme with codicon glyphs
• Drag-and-drop file loading (GLFW backend)
• Recent files list (File menu + command palette)
• Persistent user preferences (viewport, rendering, camera, history)

Architecture:

• Adding a new operation is a single-file change — zero edits to UI, toolbar, or registry
• 5-layer separation: domain / ops / render / app_state / ui
• Async worker dispatch — operations run on background threads
• 85 automated tests with architecture rule enforcement
• Cross-platform CI (Linux, Windows, macOS)

Install

From PyPI

pip install meshlite
meshlite

From source

git clone https://github.com/syedjameel/meshlite.git
cd meshlite
uv venv --python 3.13 .venv && source .venv/bin/activate
uv pip install -e ".[dev]"
python main.py

Keyboard Shortcuts

User Preferences

All settings are persisted automatically between sessions:

• Viewport: Rotate / zoom / pan sensitivity
• Rendering: Background color, mesh color, selected color, lighting (ambient, specular)
• Camera: Field of view
• History: Undo depth, memory cap

Access via the Settings panel in the sidebar (gear icon in the activity bar).

Adding a New Operation

meshlite's architecture makes it trivial to add operations. Create one file:

# src/meshlite/ops/smooth/laplacian.py

@register_operation
class LaplacianSmoothOperation(Operation):
    id = "smooth.laplacian"
    label = "Laplacian Smooth"
    category = "Mesh Edit"
    schema = ParamSchema((
        Param("iterations", "int", "Iterations", default=3, min=1, max=100),
        Param("force", "float", "Force", default=0.5, min=0.01, max=1.0),
    ))

    def run(self, mesh, params, ctx):
        # ... meshlib calls ...
        return OperationResult(mesh=mesh, message="Smoothed")

The operation automatically appears in the command palette, sidebar, properties panel, and toolbar — with zero edits to any other file.

Architecture

ui  ───>  app_state  ──>  ops  ──>  domain
 |            |            |
 └─>  render ─┘            └──>  domain

Tech Stack

• Python 3.11+
• MeshLib — mesh processing engine (GPL-3)
• imgui_bundle — Dear ImGui + hello_imgui
• moderngl — OpenGL rendering
• numpy + PyGLM

Contributing

See CONTRIBUTING.md for development setup, code style, and how to add operations.

License

GPL-3.0-or-later — matches MeshLib's license.