Open-Cascade-SAS/OCCT

Health v2 · maintenance only

Adoption not part of the score

2800 stars · 663 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Open CASCADE Technology (OCCT) is an open-source C++ development platform for 3D surface and solid modeling, CAD data exchange, and visualization. It serves as the geometric modeling kernel for building CAD, CAM, and CAE applications.

Use cases

• build a 3D CAD application
• convert STEP and IGES CAD files between formats
• perform boolean operations on 3D solid models
• create NURBS surfaces and B-Rep geometry programmatically
• render and visualize 3D models in a desktop app
• mesh 3D solids for finite element simulation
• develop CAM toolpath software
• embed a 3D viewer in a web application

When to choose

• you need a full-featured open-source geometric modeling kernel
• your application requires precise B-Rep solid and surface modeling
• you need robust CAD data exchange (STEP, IGES, BREP)
• you are building cross-platform C++ engineering software
• you want LGPL licensing with a commercial license option

When to avoid

• you only need lightweight 3D rendering without precise geometry
• you want a simple game-engine-style scene graph
• your team cannot handle a large, complex C++ API
• you need a small dependency footprint

Facets

library · maturity stable

graphics simulation sdk image-processing computer-vision graphics simulation developer-tools cross-platform cpp cross-platform windows 3d-modeling cad-kernel cam cae geometry-kernel brep data-exchange visualization c-plus-plus linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="Open-Cascade-SAS/OCCT")