MeshLib 3.1.4.554

MeshLib — an SDK that supercharges your 3D data processing efficiency

Geometry algorithms engineered to revolutionize. We help software engineers process, repair, measure and optimize 3D data with next-generation algorithms, reducing development time and costs — mesh boolean, mesh repair, decimation, offset, point cloud triangulation, ICP registration and voxel processing, in C++, C, C#, Python and JavaScript. This is the .NET package.

▶ Try it live · Website · Documentation · C# setup guide · Examples · Benchmarks · Discussions

Install

dotnet add package MeshLib

.NET Standard 2.0, with native libraries for Windows, Linux and macOS on x64 and arm64. For the other languages, see the Installation Guide.

60 seconds to your first result

Turn a scan into a triangle mesh:

var pc   = MR.PointsLoad.fromAnySupportedFormat("scan.ply");   // point cloud from any scanner
var mesh = MR.triangulatePointCloud(pc).value()!;              // point cloud -> triangle mesh
MR.MeshSave.toAnySupportedFormat(mesh, "model.stl");

Boolean operations that just work, with no non-manifold surprises:

var a = MR.makeUVSphere(1.0f, 64, 64);
var b = new MR.Mesh(a);
b.transform(MR.AffineXf3f.translation(new MR.Vector3f(0.7f, 0.0f, 0.0f)));

var res = MR.boolean(a, b, MR.BooleanOperation.Union);
if (!res.valid())
    throw new Exception(res.errorString);
MR.MeshSave.toAnySupportedFormat(res.mesh, "out_boolean.stl");

Heal a broken scan into a watertight, printable model. Voxel-based repair rebuilds the surface through a signed distance field, so holes, self-intersections and non-manifold edges disappear in a single pass:

var mesh = MR.MeshLoad.fromAnySupportedFormat("broken.stl");

var parameters = new MR.GeneralOffsetParameters();
parameters.voxelSize = mesh.computeBoundingBox().diagonal() / 200;
parameters.signDetectionMode = MR.SignDetectionMode.HoleWindingRule;
parameters.closeHolesInHoleWindingNumber = true;

var fixedMesh = MR.generalOffsetMesh(new MR.MeshPart(mesh), 0.0f, parameters);   // watertight
MR.MeshSave.toAnySupportedFormat(fixedMesh, "fixed.stl");

Voxel repair resamples the surface, so the result is denser than the input — add decimateMesh to bring the triangle count back down within a tolerance you set. Lighter, topological repair (fixMeshDegeneracies, fillHole, SelfIntersections.fix) is available when you need to preserve the original vertices.

More in Tutorials and the examples/ folder — including complete, runnable programs for repair, boolean, offset, ICP and triangulation; the C# ones are in examples/c-sharp-examples. Each snippet above is a complete console program with top-level statements; loading, saving and the other operations that can fail throw an exception with the error message.

What MeshLib does

Full feature reference: meshlib.io/features.

Why teams pick MeshLib

Measured, not claimed. Our boolean benchmark compares MeshLib across nine libraries on 2M-triangle models — method, data and input meshes. The simplification benchmark does the same for decimation across 11 libraries. Both are public and reproducible.

Manifold by construction. Meshes use a half-edge data structure, in which most non-manifold situations are simply not representable — a non-manifold edge, or a vertex with two closed rings of triangles around it. Broken topology is caught where it happens, not three pipeline stages later.

One engine, five languages. A native C++ core with official APIs for C, C#, Python and JavaScript/WebAssembly. The same algorithms, the same results — on the desktop, on a server, or in a browser tab.

Built for real workloads. Core algorithms are multithreaded; a CUDA module accelerates distance maps, signed distance fields, offsets and swept volumes on NVIDIA GPUs.

We use it ourselves. MeshInspector, our desktop and web application, and SmileInspector, our FDA-cleared clear-aligner platform, are both built entirely on this SDK, so it is exercised every day on real production data.

Supported, not abandoned. Backed by a full-time team with commercial support, regular releases and a responsive issue tracker.

Platforms

Windows · macOS · Linux (Ubuntu/Debian, Fedora/RHEL) · WebAssembly

Built with MeshLib

Shipping something built on MeshLib? Open a PR and add it here — we like showing what people build.

Getting started

1. Try the live demo — booleans, repair, decimation and ICP in the browser. No install, no sign-up.
2. Evaluate locally. dotnet add package MeshLib, then work through the tutorials. Free for non-commercial and educational use under our licence.
3. See it in an application. MeshInspector is the GUI built on MeshLib — desktop and web, 30-day trial.
4. Book a call. Integration guidance, architecture questions and commercial licensing tailored to your project.

Licence

MeshLib is source-available: read the code, fork it, and use it free for non-commercial and educational work. Commercial use requires a licence — see the full terms and the licence page.

Citing MeshLib

If MeshLib supports your research, please cite the exact version you used — find it with dotnet list package.

@software{meshlib,
  author       = {{MeshLib Development Team}},
  title        = {{MeshLib}: 3D Mesh Processing Library},
  organization = {AMV Consulting LLC},
  year         = {2026},
  version      = {3.1.4.554},
  url          = {https://meshlib.io},
  note         = {Please cite the exact version used in your work}
}

Other styles (APA, IEEE, Chicago) and guidance on citing a specific algorithm: meshlib.io/citation-guide. Published something that uses MeshLib? Tell us in Discussions — we keep a list.

Community and support

• Bugs and feature requests → GitHub Issues
• Questions, ideas, show-and-tell → GitHub Discussions
• Commercial support → meshlib.io/book-a-call

If MeshLib saves you time, a ⭐ helps other engineers find it.