Package Toolchain API Package

Getting Started

Quickstart — npm What is OpenCascade.js First Shape Tutorial FAQ Projects using OpenCascade.js

Guides

Bundler & locateFile Multi-threaded build Debugging wasm exceptions Export STEP Export glTF / GLB Render with three.js Visualize shape helper

Examples

Boolean logo Classic bottle Polygon extrusion

Concepts

Calling OCCT from JavaScript Memory and disposables Handles and collections Return shapes

Reference

init() function Module shape Exception classes

Playground

Maintained by Tau during the V3 / OCCT V8 release window — see the FAQ.

API Reference

API Reference

Auto-generated reference for 5327 bound OCCT classes across 6 modules and 261 packages.

wasm41 MB

compiled5318

requested4431

classes5327

search entries61302

▸FoundationClasses441 classes · 2 toolkits

TKernel170 classes

FSD Message NCollection OSD Precision Quantity Resource Standard StdFail Storage TCollection TColStd Units UnitsAPI UnitsMethods

TKMath271 classes

Bnd BSplCLib BSplSLib BVH Convert CSLib ElCLib ElSLib GeomAbs gp math MathInteg MathLin MathOpt MathPoly MathRoot MathSys MathUtils PLib Poly TopLoc

▸ModelingData714 classes · 4 toolkits

TKBRep309 classes

BinTools BRep BRepAdaptor BRepGraph BRepGraphInc BRepLProp BRepTools TopExp TopoDS TopTools

TKG2d40 classes

Adaptor2d Geom2d Geom2dAdaptor Geom2dEval Geom2dHash

TKG3d90 classes

Adaptor3d AdvApprox Geom GeomAdaptor GeomEval GeomHash TopAbs

TKGeomBase275 classes

AppCont AppParCurves Approx BndLib CPnts Extrema ExtremaPC FEmTool GC gce GCPnts Geom2dConvert GeomBndLib GeomConvert GeomLib GeomLProp GeomProjLib GeomTools GProp Hermit IntAna IntAna2d LProp

▸ModelingAlgorithms1250 classes · 13 toolkits

TKBO134 classes

BOPAlgo BOPDS BOPTools BRepAlgoAPI IntTools

TKBool40 classes

BRepAlgo BRepFill BRepProj

TKExpress65 classes

TKFeat32 classes

BRepFeat LocOpe

TKFillet99 classes

Blend BlendFunc BRepBlend BRepFilletAPI ChFi2d ChFi3d ChFiDS ChFiKPart FilletSurf

TKGeomAlgo319 classes

AppBlend ApproxInt FairCurve GccAna GccEnt GccInt Geom2dAPI Geom2dGcc Geom2dHatch Geom2dInt GeomAPI GeomFill GeomInt Hatch HatchGen IntCurve IntCurveSurface Intf IntImp IntPatch IntPolyh IntRes2d IntStart IntSurf IntWalk Law LocalAnalysis NLPlate Plate TopTrans

TKHelix7 classes

HelixBRep HelixGeom

TKHLR95 classes

Contap HLRAlgo HLRAppli HLRBRep HLRTopoBRep Intrv TopBas TopCnx

TKMesh114 classes

BRepMesh IMeshData IMeshTools

TKOffset34 classes

BiTgte BRepOffset BRepOffsetAPI Draft

TKPrim36 classes

BRepPreviewAPI BRepPrim BRepPrimAPI BRepSweep Sweep

TKShHealing112 classes

ShapeAlgo ShapeAnalysis ShapeBuild ShapeConstruct ShapeCustom ShapeExtend ShapeFix ShapeProcess ShapeProcessAPI ShapeUpgrade

TKTopAlgo163 classes

Bisector BRepApprox BRepBndLib BRepBuilderAPI BRepCheck BRepClass BRepClass3d BRepExtrema BRepGProp BRepIntCurveSurface BRepLib BRepMAT2d BRepTopAdaptor IntCurvesFace MAT MAT2d

▸DataExchange1852 classes · 10 toolkits

TKDE2 classes

TKDEGLTF23 classes

TKDEIGES451 classes

BRepToIGES BRepToIGESBRep Geom2dToIGES GeomToIGES IGESAppli IGESBasic IGESCAFControl IGESControl IGESConvGeom IGESData IGESDefs IGESDimen IGESDraw IGESGeom IGESGraph IGESSelect IGESSolid IGESToBRep

TKDEOBJ12 classes

TKDEPLY2 classes

TKDESTEP1067 classes

APIHeaderSection GeomToStep RWHeaderSection StepAP203 StepAP209 StepAP214 StepAP242 StepBasic STEPCAFControl STEPConstruct STEPControl StepData StepDimTol STEPEdit StepElement StepFEA StepFile StepGeom StepKinematics StepRepr StepSelect STEPSelections StepShape StepTidy StepToGeom StepToTopoDS StepVisual TopoDSToStep

TKDESTL6 classes

DESTL RWStl StlAPI

TKRWMesh15 classes

TKXCAF68 classes

XCAFApp XCAFDimTolObjects XCAFDoc XCAFNoteObjects XCAFPrs XCAFView

TKXSBase206 classes

IFGraph IFSelect Interface MoniTool Transfer TransferBRep XSAlgo XSControl

▸ApplicationFramework193 classes · 3 toolkits

TKCAF42 classes

AppStd TDataXtd TNaming

TKCDF55 classes

CDF CDM LDOM PCDM

TKLCAF96 classes

AppStdL TDataStd TDF TDocStd TFunction

▸Synthetic877 classes · 1 toolkits

NCollectionAuto877 classes

Return shapes

What OCCT methods return in JS — native values, in-place class outputs, primitive envelopes, returnValue, and Handle elision.

FoundationClasses

Runtime primitives: gp_*, Standard_*, NCollection, OS abstraction.