# BrepEdge class

Namespace: [Rhino.Geometry](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.geometry.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md)

```cs
public class BrepEdge : CurveProxy
```

Represents a single edge curve in a Brep object.

## Properties

- [Brep](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/brep.md): Gets the Brep that owns this edge.
- [EdgeCurve](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/edgecurve.md): Get the brep.Curves3D[] 3d curve geometry used by this edge or null.
- [EdgeCurveIndex](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/edgecurveindex.md): Get the brep.Curves3D[] index of the 3d curve geometry used by this edge or -1.
- [EdgeIndex](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/edgeindex.md): Gets the index of this edge in the Brep.Edges collection.
- [EndVertex](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/endvertex.md): BrepVertex at end of edge
- [ProxyBrepSubDEdgeId](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/proxybrepsubdedgeid.md): If this edge is part of a brep created by SubD.ProxyBrep(), then the subd component id of the corresponding SubD edge is returned. Otherwise 0 is returned.
- [StartVertex](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/startvertex.md): BrepVertex at start of edge
- [Tolerance](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/tolerance.md): Gets or sets the accuracy of the edge curve (>=0.0 or RhinoMath.UnsetValue) A value of UnsetValue indicates that the tolerance should be computed. The maximum distance from the edge's 3d curve to any surface of a face that has this edge as a portion of its boundary must be <= this tolerance.
- [TrimCount](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/trimcount.md): Gets the number of trim-curves that use this edge.
- [Valence](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/valence.md): Gets the topological valency of this edge. The topological valency is defined by how many adjacent faces share this edge.

## Methods

- [AdjacentFaces](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/adjacentfaces.md): Gets the indices of all the BrepFaces that use this edge.
- [ConcavityAt](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/concavityat.md): Determine the concavity of this edge at a specific parameter.
- [Get3dVectorsIntoFaces](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/get3dvectorsintofaces.md): For each trim at this edge, find the 3d unit vector at the edge parameter in the trim's surface tangent plane, perpendicular to the edge, which points to the active side of the trim.
- [GetEdgeParameter](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/getedgeparameter.md): Get corresponding edge parameter for given trim at given trim parameter.
- [IsSmoothManifoldEdge](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/issmoothmanifoldedge.md): For a manifold, non-boundary edge, decides whether or not the two surfaces on either side meet smoothly.
- [SetEdgeCurve](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/setedgecurve.md): (2 overloads) Set 3d curve geometry used by a b-rep edge.
- [TrimIndices](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.brepedge/trimindices.md): Gets the indices of all trims associated with this edge.

## Inherited Members

- From [CurveProxy](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curveproxy.md): [ProxyCurveIsReversed](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curveproxy/proxycurveisreversed.md)
- From [Curve](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve.md): [Degree](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/degree.md), [Dimension](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/dimension.md), [Domain](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/domain.md), [IsClosed](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/isclosed.md), [IsPeriodic](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/isperiodic.md), [IsSubDFriendly](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/issubdfriendly.md), [PointAtEnd](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/pointatend.md), [PointAtMid](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/pointatmid.md), [PointAtStart](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/pointatstart.md), [SpanCount](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/spancount.md), [TangentAtEnd](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/tangentatend.md), [TangentAtStart](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/tangentatstart.md), [ChangeClosedCurveSeam](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/changeclosedcurveseam.md), [ChangeDimension](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/changedimension.md), [ClosedCurveOrientation](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/closedcurveorientation.md), [ClosestPoint](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/closestpoint.md), [ClosestPoints](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/closestpoints.md), [CombineShortSegments](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/combineshortsegments.md), [Contains](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/contains.md), [ControlPolygon](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/controlpolygon.md), [CurvatureAt](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/curvatureat.md), [DerivativeAt](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/derivativeat.md), [Dispose](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/dispose.md), [DivideAsContour](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/divideascontour.md), [DivideByCount](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/dividebycount.md), [DivideByLength](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/dividebylength.md), [DivideEquidistant](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/divideequidistant.md), [Duplicate](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/duplicate.md), [DuplicateCurve](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/duplicatecurve.md), [DuplicateSegments](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/duplicatesegments.md), [Extend](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/extend.md), [ExtendByArc](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/extendbyarc.md), [ExtendByLine](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/extendbyline.md), [ExtendOnSurface](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/extendonsurface.md), [ExtremeParameters](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/extremeparameters.md), [Fair](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/fair.md), [FilletSurfaceToCurve](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/filletsurfacetocurve.md), [FilletSurfaceToRail](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/filletsurfacetorail.md), [FindLocalInflection](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/findlocalinflection.md), [Fit](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/fit.md), [FrameAt](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/frameat.md), [GetConicSectionType](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/getconicsectiontype.md), [GetCurveParameterFromNurbsFormParameter](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/getcurveparameterfromnurbsformparameter.md), [GetLength](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/getlength.md), [GetLocalPerpPoint](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/getlocalperppoint.md), [GetLocalTangentPoint](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/getlocaltangentpoint.md), [GetNextDiscontinuity](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/getnextdiscontinuity.md), [GetNurbsFormParameterFromCurveParameter](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/getnurbsformparameterfromcurveparameter.md), [GetPerpendicularFrames](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/getperpendicularframes.md), [GetSubCurves](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/getsubcurves.md), [HasNurbsForm](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/hasnurbsform.md), [InflectionPoints](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/inflectionpoints.md), [IsArc](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/isarc.md), [IsCircle](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/iscircle.md), [IsClosable](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/isclosable.md), [IsContinuous](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/iscontinuous.md), [IsEllipse](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/isellipse.md), [IsInPlane](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/isinplane.md), [IsLinear](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/islinear.md), [IsPlanar](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/isplanar.md), [IsPolyline](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/ispolyline.md), [IsShort](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/isshort.md), [LcoalClosestPoint](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/lcoalclosestpoint.md), [LengthParameter](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/lengthparameter.md), [LocalClosestPoint](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/localclosestpoint.md), [MakeClosed](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/makeclosed.md), [MaxCurvaturePoints](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/maxcurvaturepoints.md), [NonConstOperation](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/nonconstoperation.md), [NormalizedLengthParameter](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/normalizedlengthparameter.md), [NormalizedLengthParameters](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/normalizedlengthparameters.md), [Offset](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/offset.md), [OffsetNormalToSurface](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/offsetnormaltosurface.md), [OffsetOnSurface](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/offsetonsurface.md), [OffsetTangentToSurface](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/offsettangenttosurface.md), [PerpendicularFrameAt](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/perpendicularframeat.md), [PointAt](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/pointat.md), [PointAtLength](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/pointatlength.md), [PointAtNormalizedLength](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/pointatnormalizedlength.md), [PullToBrepFace](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/pulltobrepface.md), [PullToMesh](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/pulltomesh.md), [Rebuild](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/rebuild.md), [RebuildToMatchTemplateCurve](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/rebuildtomatchtemplatecurve.md), [RemoveShortSegments](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/removeshortsegments.md), [Repair](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/repair.md), [Reparameterize](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/reparameterize.md), [Reverse](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/reverse.md), [RibbonOffset](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/ribbonoffset.md), [SetEndPoint](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/setendpoint.md), [SetStartPoint](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/setstartpoint.md), [Simplify](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/simplify.md), [SimplifyEnd](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/simplifyend.md), [Smooth](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/smooth.md), [SpanDomain](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/spandomain.md), [SpanVector](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/spanvector.md), [Split](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/split.md), [TangentAt](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/tangentat.md), [ToArcsAndLines](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/toarcsandlines.md), [ToNurbsCurve](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/tonurbscurve.md), [ToPolyline](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/topolyline.md), [TorsionAt](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/torsionat.md), [Trim](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/trim.md), [TrimInterval](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/triminterval.md), [TryGetArc](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/trygetarc.md), [TryGetCircle](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/trygetcircle.md), [TryGetEllipse](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/trygetellipse.md), [TryGetPlane](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/trygetplane.md), [TryGetPolyline](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.curve/trygetpolyline.md)
- From [GeometryBase](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase.md): [HasBrepForm](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/hasbrepform.md), [IsDeformable](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/isdeformable.md), [IsDocumentControlled](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/isdocumentcontrolled.md), [IsShallowDuplicate](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/isshallowduplicate.md), [ObjectType](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/objecttype.md), [UserStringCount](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/userstringcount.md), [ComponentIndex](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/componentindex.md), [DataCRC](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/datacrc.md), [DeleteAllUserStrings](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/deletealluserstrings.md), [DeleteUserString](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/deleteuserstring.md), [DuplicateShallow](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/duplicateshallow.md), [GetBoundingBox](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/getboundingbox.md), [GetUserString](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/getuserstring.md), [GetUserStrings](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/getuserstrings.md), [MakeDeformable](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/makedeformable.md), [MemoryEstimate](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/memoryestimate.md), [OnSwitchToNonConst](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/onswitchtononconst.md), [Rotate](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/rotate.md), [Scale](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/scale.md), [SetUserString](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/setuserstring.md), [Transform](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/transform.md), [Translate](https://developer.rhino3d.com/api/rhinocommon/type/rhino.geometry.geometrybase/translate.md)
- From [CommonObject](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject.md): [Disposed](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/disposed.md), [HasUserData](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/hasuserdata.md), [IsValid](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/isvalid.md), [UserData](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/userdata.md), [UserDictionary](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/userdictionary.md), [ConstructConstObject](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/constructconstobject.md), [Dispose](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/dispose.md), [EnsurePrivateCopy](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/ensureprivatecopy.md), [GetObjectData](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/getobjectdata.md), [IsValidWithLog](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/isvalidwithlog.md), [ToJSON](https://developer.rhino3d.com/api/rhinocommon/type/rhino.runtime.commonobject/tojson.md)