One model for any multiphysics problem — geometry, motion, loads, and analysis state, format-agnostic.
Cae
Dependency Graph
Extropian CAE is the ecosystem's data foundation: a modular, dependency-light C++ library organized around CAEModel, a unified, format-agnostic in-memory IR. One model per part or machine carries everything an analysis needs: parts and assemblies with labelled CAE patches, a deterministic material database, multiphysics regions/domains/interfaces, physics-tagged boundary conditions and body loads, symmetry/cyclic/rotating frames, a motion graph of joints and couplings, and the analysis state itself — volume discretization, initial and ambient conditions, time domain, and physics couplings.
Every file format is an adapter over the model. Deterministic exporters cover OBJ, STL, Gmsh .msh, VTK/VTU, faceted STEP, and MJCF/URDF for mechanisms; importers rebuild CAEModel from OBJ, STL, Gmsh, FBX, and analytic STEP in a WASM-clean, dependency-free core. An opt-in tier (exd-cae-io) adds analytic STEP/IGES/BREP via OpenCASCADE and the wider mesh zoo (FBX/glTF/3DS/COLLADA/…) plus glTF 2.0 export via Assimp, with dependencies fetched automatically — no OS configuration required.
Parametric machine recipes (turbine, compressor, single-cylinder steam engine) return patched assemblies with mechanisms; full demo analysis scenes — from a ~2 m turbofan down to a µm-scale MEMS biosensor — populate every field and pass validate_analysis() with zero errors. Mass properties come from Mirtich tetrahedron decomposition.
Core capabilities
Unified CAEModel IR spanning geometry, patches, materials, multiphysics topology, loads, motion, and analysis state
Deterministic adapters for STL, OBJ, Gmsh .msh, VTK/VTU, faceted STEP, MJCF, and URDF
Dependency-free WASM-clean importers, plus an optional OpenCASCADE/Assimp tier for STEP, IGES, BREP, FBX, glTF, 3DS, and more
Motion graph with fixed/revolute/continuous/prismatic joints, limits and compliance, and gear/belt/rack couplings
Mass properties and parametric machine recipes producing watertight, patched assemblies
Technical foundation
Built on extropian-core math/mesh types and extropian-geometry mesh generation
Dependency-free core library with heavy deps isolated in the opt-in exd-cae-io module
Designed for solver intake: capability negotiation, content hashes, and deterministic validation
Source Available (PolyForm Shield)Binary Distribution (Proprietary)Internal Use (Proprietary)
Licensing is negotiated around the software, deployment model, scope, and ownership requirements of each project — whether Extropian CAE is used as-is, customized for your workflows, or embedded in a larger system you are building. I prefer perpetual licenses per major version: one fee licenses the version you chose for as long as you use it, with maintenance updates included within that major version.
Source Available (PolyForm Shield): view and build from the source under terms that prevent offering it as a competing product or service — no license fees or royalties.
Binary Distribution (Proprietary): one-time license to use and distribute the software in binary form, including inside products you sell.
Internal Use (Proprietary): one-time license for ongoing internal use of the software as delivered — no distribution, no recurring fees.
