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Engineering & Simulation · Geometry engines that never lose precision
CAD kernels: the geometry engine underneath your product.
Geometric modelling kernels — B-rep topology, NURBS surfaces, robust booleans, and tessellation engineered for numerical stability.
Delivered from our Chennai and Bengaluru studios — to clients across India and overseas.
// The problem
Your boolean operations fail on the geometry that matters most.
A CAD kernel is the hardest component of any design application to get right, and its weaknesses surface precisely where customers care: tangent faces, near-degenerate geometry, imported files from other systems. Failures there are not cosmetic — they corrupt models quietly.
Teams building design software face a choice between royalty-bearing commercial kernels whose per-seat economics may not work, and open-source kernels that are capable but rough at exactly the robustness edges that matter.
Does any of this sound familiar?
Booleans failing on real geometry
Operations that work on test cases and break on customer models.
Imported files that will not heal
STEP and IGES geometry with gaps and tolerance mismatches that block downstream work.
Per-seat royalties that do not scale
Commercial kernel economics that break your pricing model.
Tessellation cracks and precision loss
Visible defects in display, printing and downstream meshing.
What it costs to leave this alone
Geometry failures are the defects customers remember, because they destroy work. In design software, robustness is not a quality attribute — it is the product.
// How we fix it
Our approach to CAD Kernel Development
We build and harden geometric modelling kernels with robustness designed in at the predicate level: exact and adaptive-precision arithmetic for critical decisions, tolerant topology carrying per-entity tolerances, and extensive fuzz testing against degenerate configurations.
Where a full kernel is not warranted, we harden OpenCASCADE — fixing boolean failures, building reliable wrapper layers, and adding the operations your product needs — which usually delivers most of the benefit at a fraction of the cost.
Talk to us about your project// What changes
The return, in plain terms
What you should expect to be different once this is in place.
Robust
Boolean operations
Engineered to survive tangency, coincidence and near-degenerate cases.
Healed
Imported geometry
STEP and IGES models stitched and repaired so downstream operations succeed.
Crack-free
Tessellation
Adaptive triangulation with controllable tolerance for display and manufacturing.
// What's included
Everything in CAD Kernel Development
B-rep topology & data structures
Boundary-representation modelling with half-edge or winged-edge topology, validated for manifoldness and orientation at every operation.
NURBS curves & surfaces
Evaluation, knot insertion, degree elevation, trimming, and surface-surface intersection implemented with numerical stability as the priority.
Robust boolean operations
Union, subtraction, and intersection engineered to survive tangency, coincidence, and near-degenerate cases — the failures that break naive implementations.
Tolerant modelling & healing
Imported STEP and IGES geometry repaired: gaps stitched, tolerances reconciled, and invalid topology healed so downstream operations succeed.
Tessellation & rendering meshes
Adaptive, crack-free triangulation with controllable chord tolerance for display, 3D printing, and downstream analysis meshing.
Standard format interoperability
STEP, IGES, STL, and native format import and export built to real specification compliance, not best-effort parsing.
// Who this is for
Is this you?
Design software product teams
Building CAD, CAM or engineering applications.
Companies constrained by kernel royalties
Where per-seat licensing conflicts with their pricing.
Teams struggling with OpenCASCADE robustness
Needing a hardened, production-grade layer.
// Problems we've solved
From challenge to result
Representative engagements, described in terms of what changed for the business.
The challenge
A design application failed boolean operations on a meaningful share of customer-supplied geometry.
What we did
Rebuilt the critical predicates with adaptive precision and introduced tolerant topology, fuzz-tested against degenerate cases.
The result
Operations that previously failed on real models completed reliably.
The challenge
Imported STEP files arrived with gaps that blocked all downstream processing.
What we did
Built a healing layer that stitches surfaces, reconciles tolerances and validates topology before use.
The result
Third-party geometry became usable without manual repair.
// Technology
The stack we reach for
Chosen for durability and fit — and handed over as documented code you own outright.
C++
OpenCASCADE
Parasolid
CGAL
NURBS
STEP/IGES
Rust
Eigen
// Questions
CAD Kernel Development — FAQs
Licensing is usually right if you need broad, battle-tested modelling coverage and the royalty economics work. Building becomes compelling when royalties per seat are prohibitive at your scale, when you need a narrow, specialised geometry engine, or when you cannot ship a third-party kernel inside your deployment. We help you evaluate honestly.
Yes, and often that is the pragmatic path. OpenCASCADE is powerful but has rough edges in robustness and API ergonomics. We build hardened wrapper layers, fix boolean failures, and extend it with the operations your product needs.
With exact or adaptive-precision predicates for the critical decisions, tolerant topology that carries per-entity tolerances, and extensive fuzz testing against degenerate configurations. Robustness is designed in at the predicate level — it cannot be retrofitted with epsilon tweaks.
Yes — we deliver it as a clean library with a stable C or C++ API, plus bindings for Python, C#, or JavaScript/WebAssembly so it can run in desktop, server, or browser-based products.
// Read before you commit
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Read more// Explore more
Other things we engineer
Most clients start with one service and grow into others. One team owns the whole stack.