RhinoCommon API

Mesh Class

Represents a geometry type that is defined by vertices and faces.

This is often called a face-vertex mesh.

Inheritance Hierarchy

SystemObject
  Rhino.RuntimeCommonObject
    Rhino.GeometryGeometryBase
      Rhino.GeometryMesh

Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll)

Syntax

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[SerializableAttribute]
public class Mesh : GeometryBase

<SerializableAttribute>
Public Class Mesh
	Inherits GeometryBase

The Mesh type exposes the following members.

Constructors

	Name	Description
	Mesh	Initializes a new empty mesh.
	Mesh(SerializationInfo, StreamingContext)	Protected constructor for internal use.

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Properties

	Name	Description
	ComponentStates	Gets access to the vertex hidden/visibility collection in this mesh. This is a runtime property and it is not saved in the 3dm file.
	DisjointMeshCount	Gets the number of disjoint (topologically unconnected) pieces in this mesh.
	Disposed	Indicates if this object has been disposed or the document it originally belonged to has been disposed. (Inherited from CommonObject.)
	FaceNormals	Gets access to the face normal collection in this mesh.
	Faces	Gets access to the mesh face list.
	HasBrepForm	Returns true if the Brep.TryConvertBrep function will be successful for this object (Inherited from GeometryBase.)
	HasCachedTextureCoordinates	Will return true if SetCachedTextureCoordinates has been called; otherwise will return false.
	HasPrincipalCurvatures	HasPrincipalCurvatures
	HasUserData	Gets true if this class has any custom information attached to it through UserData. (Inherited from CommonObject.)
	IsClosed	Gets a value indicating whether a mesh is considered to be closed (solid). A mesh is considered solid when every mesh edge borders two or more faces.
	IsDeformable	true if object can be accurately modified with "squishy" transformations like projections, shears, and non-uniform scaling. (Inherited from GeometryBase.)
	IsDocumentControlled	If true this object may not be modified. Any properties or functions that attempt to modify this object when it is set to "IsReadOnly" will throw a NotSupportedException. (Inherited from GeometryBase.)
	IsValid	Tests an object to see if it is valid. (Inherited from CommonObject.)
	Ngons	Gets access to the mesh ngon list. Ngons represent groups of Faces (triangles + quads). Faces are used to tessellate an Ngon internally. When a triangle or quad is referenced in the Ngon list, it is no longer visualized and conceived as a single entity, but takes part of the Ngon. If you need to get access to both Ngons and the faces that are not referenced by Ngons, that is, all polygons that are visible in the mesh, then use the GetNgonAndFacesEnumerable helper method.
	Normals	Gets access to the vertex normal collection in this mesh.
	ObjectType	Useful for switch statements that need to differentiate between basic object types like points, curves, surfaces, and so on. (Inherited from GeometryBase.)
	PartitionCount	Number of partition information chunks stored on this mesh based on the last call to CreatePartitions
	TextureCoordinates	Gets access to the vertex texture coordinate collection in this mesh.
	TopologyEdges	Gets the MeshTopologyEdgeList object associated with this mesh. This object stores edge connectivity.
	TopologyVertices	Gets the MeshTopologyVertexList object associated with this mesh. This object stores vertex connectivity and the indices of vertices that were unified while computing the edge topology.
	UserData	List of custom information that is attached to this class. (Inherited from CommonObject.)
	UserDictionary	Dictionary of custom information attached to this class. The dictionary is actually user data provided as an easy to use sharable set of information. (Inherited from CommonObject.)
	UserStringCount	Gets the amount of user strings. (Inherited from GeometryBase.)
	VertexColors	Gets access to the (optional) vertex color collection in this mesh.
	Vertices	Gets access to the vertices set of this mesh.

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Methods

	Name	Description
	Append(Mesh)	Appends a copy of another mesh to this one and updates indices of appended mesh parts.
	Append(IEnumerableMesh)	Append a list of meshes. This function is much more efficient than making repeated calls to Mesh.Append(Mesh) when lots of meshes are being joined into a single large mesh.
	Check	Examines the mesh and logs a description of what it finds right or wrong. The various properties the function checks for are described in MeshCheckParameters.
	ClearSurfaceData	Removes surface parameters, curvature parameters and surface statistics from the mesh.
	ClearTextureData	Removes all texture coordinate information from this mesh.
	ClosestMeshPoint	Gets the point on the mesh that is closest to a given test point. Similar to the ClosestPoint function except this returns a MeshPoint class which includes extra information beyond just the location of the closest point.
	ClosestPoint(Point3d)	Gets the point on the mesh that is closest to a given test point.
	ClosestPoint(Point3d, Point3d, Double)	Gets the point on the mesh that is closest to a given test point.
	ClosestPoint(Point3d, Point3d, Vector3d, Double)	Gets the point on the mesh that is closest to a given test point.
	CollapseFacesByArea	Collapses multiple mesh faces, with areas less than LessThanArea and greater than GreaterThanArea, based on the principles found in Stan Melax's mesh reduction PDF, see http://pomax.nihongoresources.com/downloads/PolygonReduction.pdf
	CollapseFacesByByAspectRatio	Collapses a multiple mesh faces, determined by face aspect ratio, based on criteria found in Stan Melax's polygon reduction, see http://pomax.nihongoresources.com/downloads/PolygonReduction.pdf
	CollapseFacesByEdgeLength	Collapses multiple mesh faces, with greater/less than edge length, based on the principles found in Stan Melax's mesh reduction PDF, see http://pomax.nihongoresources.com/downloads/PolygonReduction.pdf
	ColorAt(MeshPoint)	Evaluate a mesh color at a set of barycentric coordinates.
	ColorAt(Int32, Double, Double, Double, Double)	Evaluate a mesh normal at a set of barycentric coordinates. Barycentric coordinates must be assigned in accordance with the rules as defined by MeshPoint.T.
	Compact	Removes any unreferenced objects from arrays, re-indexes as needed and shrinks arrays to minimum required size.
	ComponentIndex	If this piece of geometry is a component in something larger, like a BrepEdge in a Brep, then this function returns the component index. (Inherited from GeometryBase.)
	ComputeThickness(IEnumerableMesh, Double)	Compute thickness metrics for this mesh.
	ComputeThickness(IEnumerableMesh, Double, CancellationToken)	Compute thickness metrics for this mesh.
	ComputeThickness(IEnumerableMesh, Double, Double, CancellationToken)	Compute thickness metrics for this mesh.
	ConstructConstObject	Assigns a parent object and a sub-object index to this. (Inherited from CommonObject.)
	CopyFrom	Copies mesh values into this mesh from another mesh.
	CreateBooleanDifference	Computes the solid difference of two sets of Meshes.
	CreateBooleanIntersection	Computes the solid intersection of two sets of meshes.
	CreateBooleanSplit	Splits a set of meshes with another set.
	CreateBooleanUnion	Computes the solid union of a set of meshes.
	CreateContourCurves(Mesh, Plane)	Constructs contour curves for a mesh, sectioned at a plane.
	CreateContourCurves(Mesh, Point3d, Point3d, Double)	Constructs contour curves for a mesh, sectioned along a linear axis.
	CreateFromBox(BoundingBox, Int32, Int32, Int32)	Constructs new mesh that matches a bounding box.
	CreateFromBox(Box, Int32, Int32, Int32)	Constructs new mesh that matches an aligned box.
	CreateFromBox(IEnumerablePoint3d, Int32, Int32, Int32)	Constructs new mesh from 8 corner points.
	CreateFromBrep(Brep)	Obsolete. Constructs a mesh from a brep.
	CreateFromBrep(Brep, MeshingParameters)	Constructs a mesh from a brep.
	CreateFromClosedPolyline	Attempts to create a Mesh that is a triangulation of a simple closed polyline that projects onto a plane.
	CreateFromCone(Cone, Int32, Int32)	Constructs a solid mesh cone.
	CreateFromCone(Cone, Int32, Int32, Boolean)	Constructs a mesh cone.
	CreateFromCone(Cone, Int32, Int32, Boolean, Boolean)	Constructs a mesh cone.
	CreateFromCurveExtrusion	Constructs a new extrusion from a curve.
	CreateFromCurvePipe	Constructs a new mesh pipe from a curve.
	CreateFromCylinder(Cylinder, Int32, Int32)	Constructs a capped mesh cylinder.
	CreateFromCylinder(Cylinder, Int32, Int32, Boolean, Boolean)	Constructs a mesh cylinder.
	CreateFromCylinder(Cylinder, Int32, Int32, Boolean, Boolean, Boolean)	Constructs a mesh cylinder.
	CreateFromFilteredFaceList	Constructs a sub-mesh, that contains a filtered list of faces.
	CreateFromIterativeCleanup	Repairs meshes with vertices that are too near, using a tolerance value.
	CreateFromLines	Creates a mesh by analizing the edge structure. Input lines could be from the extraction of edges from an original mesh.
	CreateFromPlanarBoundary(Curve, MeshingParameters)	Obsolete. Do not use this overload. Use version that takes a tolerance parameter instead.
	CreateFromPlanarBoundary(Curve, MeshingParameters, Double)	Attempts to construct a mesh from a closed planar curve.RhinoMakePlanarMeshes
	CreateFromPlane	Constructs a planar mesh grid.
	CreateFromSphere	Constructs a mesh sphere.
	CreateFromSubD	Create a mesh from a SubD limit surface
	CreateFromSubDControlNet	Create a mesh from a SubD control net
	CreateFromSurface(Surface)	Constructs a mesh from a surface
	CreateFromSurface(Surface, MeshingParameters)	Constructs a mesh from a surface
	CreateFromTessellation	Attempts to create a mesh that is a triangulation of a list of points, projected on a plane, including its holes and fixed edges.
	CreateFromTorus	Constructs a mesh torus.
	CreateIcoSphere	Constructs a icospherical mesh. A mesh icosphere differs from a standard UV mesh sphere in that it's vertices are evenly distributed. A mesh icosphere starts from an icosahedron (a regular polyhedron with 20 equilateral triangles). It is then refined by splitting each triangle into 4 smaller triangles. This splitting can be done several times.
	CreatePartitions	In ancient times (or modern smart phone times), some rendering engines were only able to process small batches of triangles and the CreatePartitions() function was provided to partition the mesh into subsets of vertices and faces that those rendering engines could handle.
	CreatePatch	Construct a mesh patch from a variety of input geometry.
	CreateQuadSphere	Constructs a quad mesh sphere. A quad mesh sphere differs from a standard UV mesh sphere in that it's vertices are evenly distributed. A quad mesh sphere starts from a cube (a regular polyhedron with 6 square sides). It is then refined by splitting each quad into 4 smaller quads. This splitting can be done several times.
	DestroyPartition	Destroys mesh partition.
	DestroyTopology	Removes topology data, forcing all topology information to be recomputed.
	DestroyTree	Destroys the mesh vertex access tree.
	Dispose	Actively reclaims unmanaged resources that this instance uses. (Inherited from CommonObject.)
	Dispose(Boolean)	Overridden in order to destroy local display cache information (Inherited from GeometryBase.)
	Duplicate	Constructs a copy of this mesh. This is the same as DuplicateMesh. (Overrides GeometryBaseDuplicate.)
	DuplicateMesh	Constructs a copy of this mesh. This is the same as Duplicate.
	DuplicateShallow	Constructs a light copy of this object. By "light", it is meant that the same underlying data is used until something is done to attempt to change it. For example, you could have a shallow copy of a very heavy mesh object and the same underlying data will be used when doing things like inspecting the number of faces on the mesh. If you modify the location of one of the mesh vertices, the shallow copy will create a full duplicate of the underlying mesh data and the shallow copy will become a deep copy. (Inherited from GeometryBase.)
	EnsurePrivateCopy	If you want to keep a copy of this class around by holding onto it in a variable after a command completes, call EnsurePrivateCopy to make sure that this class is not tied to the document. You can call this function as many times as you want. (Inherited from CommonObject.)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	EvaluateMeshGeometry	If the mesh has SurfaceParameters, the surface is evaluated at these parameters and the mesh geometry is updated.
	ExplodeAtUnweldedEdges	Explode the mesh into sub-meshes where a sub-mesh is a collection of faces that are contained within a closed loop of "unwelded" edges. Unwelded edges are edges where the faces that share the edge have unique mesh vertexes (not mesh topology vertexes) at both ends of the edge.
	ExtendSelectionByEdgeRidge	Suggests an extension of a selection set by using information related with topology and alignment.
	ExtendSelectionByFaceLoop	Suggests an extension of a face selection set by using information related with topology and alignment.
	ExtractNonManifoldEdges	Extracts, or removes, non-manifold mesh edges.
	FileHole	Given a starting "naked" edge index, this function attempts to determine a "hole" by chaining additional naked edges together until if returns to the start index. Then it triangulates the closed polygon and either adds the faces to the mesh.
	FillHoles	Attempts to determine "holes" in the mesh by chaining naked edges together. Then it triangulates the closed polygons adds the faces to the mesh.
	Finalize	Passively reclaims unmanaged resources when the class user did not explicitly call Dispose(). (Inherited from CommonObject.)
	Flip(Boolean, Boolean, Boolean)	Reverses the direction of the mesh.
	Flip(Boolean, Boolean, Boolean, Boolean)	Reverses the direction of the mesh.
	GetBoundingBox(Boolean)	Bounding box solver. Gets the world axis aligned bounding box for the geometry. (Inherited from GeometryBase.)
	GetBoundingBox(Plane)	Aligned Bounding box solver. Gets the plane aligned bounding box. (Inherited from GeometryBase.)
	GetBoundingBox(Transform)	Aligned Bounding box solver. Gets the world axis aligned bounding box for the transformed geometry. (Inherited from GeometryBase.)
	GetBoundingBox(Plane, Box)	Aligned Bounding box solver. Gets the plane aligned bounding box. (Inherited from GeometryBase.)
	GetCachedTextureCoordinates	Call this method to get cached texture coordinates for a texture mapping with the specified Id.
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetNakedEdgePointStatus	Returns an array of Boolean values equal in length to the number of vertices in this mesh. Each value corresponds to a mesh vertex and is set to true if the vertex is not completely surrounded by faces.
	GetNakedEdges	Returns all edges of a mesh that are considered "naked" in the sense that the edge only has one face.
	GetNgonAndFacesCount	Retrieves the count of items that GetNgonAndFacesEnumerable will provide.
	GetNgonAndFacesEnumerable	Retrieves a complete enumerable, i.e., one that provides an iterator over every face that is present, no matter if defined as a triangle, a quad, or a strictly over-four-sided ngon.
	GetObjectData	Populates a System.Runtime.Serialization.SerializationInfo with the data needed to serialize the target object. (Inherited from CommonObject.)
	GetOutlines(Plane)	Constructs the outlines of a mesh projected against a plane.
	GetOutlines(RhinoViewport)	Constructs the outlines of a mesh. The projection information in the viewport is used to determine how the outlines are projected.
	GetOutlines(ViewportInfo, Plane)	Constructs the outlines of a mesh.
	GetPartition	Retrieves a partition. See CreatePartitions(Int32, Int32) for details.
	GetSelfIntersections	Gets the intersections of this mesh with itself.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetUnsafeLock	Allows to obtain unsafe pointers to the underlying unmanaged data structures of the mesh.
	GetUserString	Gets user string from this geometry. (Inherited from GeometryBase.)
	GetUserStrings	Gets a copy of all (user key string, user value string) pairs attached to this geometry. (Inherited from GeometryBase.)
	HealNakedEdges	Attempts to "heal" naked edges in a mesh based on a given distance. First attempts to move vertexes to neighboring vertexes that are within that distance away. Then it finds edges that have a closest point to the vertex within the distance and splits the edge. When it finds one it splits the edge and makes two new edges using that point.
	IsManifold	Gets a value indicating whether or not the mesh is manifold. A manifold mesh does not have any edge that borders more than two faces.
	IsPointInside	Determines if a point is inside a solid mesh.
	IsValidWithLog	Determines if an object is valid. Also provides a report on errors if this object happens not to be valid. (Inherited from CommonObject.)
	MakeDeformable	If possible, converts the object into a form that can be accurately modified with "squishy" transformations like projections, shears, an non-uniform scaling. (Inherited from GeometryBase.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	MemoryEstimate	Computes an estimate of the number of bytes that this object is using in memory. (Inherited from GeometryBase.)
	NonConstOperation	Clear local cache on non constant calls (Overrides GeometryBaseNonConstOperation.)
	NormalAt(MeshPoint)	Evaluate a mesh normal at a set of barycentric coordinates.
	NormalAt(Int32, Double, Double, Double, Double)	Evaluate a mesh normal at a set of barycentric coordinates. Barycentric coordinates must be assigned in accordance with the rules as defined by MeshPoint.T.
	Offset(Double)	Makes a new mesh with vertices offset a distance in the opposite direction of the existing vertex normals. Same as Mesh.Offset(distance, false)
	Offset(Double, Boolean)	Makes a new mesh with vertices offset a distance in the opposite direction of the existing vertex normals. Optionally, based on the value of solidify, adds the input mesh and a ribbon of faces along any naked edges. If solidify is false it acts exactly as the Offset(distance) function.
	Offset(Double, Boolean, Vector3d)	Makes a new mesh with vertices offset a distance along the direction parameter. Optionally, based on the value of solidify, adds the input mesh and a ribbon of faces along any naked edges. If solidify is false it acts exactly as the Offset(distance) function.
	Offset(Double, Boolean, Vector3d, ListInt32)	Makes a new mesh with vertices offset a distance along the direction parameter. Optionally, based on the value of solidify, adds the input mesh and a ribbon of faces along any naked edges. If solidify is false it acts exactly as the Offset(distance) function. Returns list of wall faces, i.e. the faces that connect original and offset mesh when solidified.
	OnSwitchToNonConst	Performs some memory cleanup if necessary (Overrides GeometryBaseOnSwitchToNonConst.)
	PointAt(MeshPoint)	Evaluate a mesh at a set of barycentric coordinates.
	PointAt(Int32, Double, Double, Double, Double)	Evaluates a mesh at a set of barycentric coordinates. Barycentric coordinates must be assigned in accordance with the rules as defined by MeshPoint.T.
	PullCurve	Gets a polyline approximation of the input curve and then moves its control points to the closest point on the mesh. Then it "connects the points" over edges so that a polyline on the mesh is formed.
	PullPointsToMesh	Pulls a collection of points to a mesh.
	QuadRemesh(QuadRemeshParameters)	Quad remesh this mesh.
	QuadRemesh(QuadRemeshParameters, IEnumerableCurve)	Quad remesh this mesh.
	QuadRemeshAsync(QuadRemeshParameters, IProgressInt32, CancellationToken)	Quad remesh this mesh asynchronously.
	QuadRemeshAsync(QuadRemeshParameters, IEnumerableCurve, IProgressInt32, CancellationToken)	Quad remesh this mesh asynchronously.
	QuadRemeshAsync(IEnumerableInt32, QuadRemeshParameters, IEnumerableCurve, IProgressInt32, CancellationToken)	Quad remesh this mesh asynchronously.
	QuadRemeshBrep(Brep, QuadRemeshParameters)	Create QuadRemesh from a Brep Set Brep Face Mode by setting QuadRemeshParameters.PreserveMeshArrayEdgesMode
	QuadRemeshBrep(Brep, QuadRemeshParameters, IEnumerableCurve)	Create Quad Remesh from a Brep
	QuadRemeshBrepAsync(Brep, QuadRemeshParameters, IProgressInt32, CancellationToken)	Quad remesh this Brep asynchronously.
	QuadRemeshBrepAsync(Brep, QuadRemeshParameters, IEnumerableCurve, IProgressInt32, CancellationToken)	Quad remesh this Brep asynchronously.
	RebuildNormals	Removes mesh normals and reconstructs the face and vertex normals based on the orientation of the faces.
	Reduce(ReduceMeshParameters)	Reduce polygon count
	Reduce(ReduceMeshParameters, Boolean)	Reduce polygon count
	Reduce(Int32, Boolean, Int32, Boolean)	Reduce polygon count
	Reduce(Int32, Boolean, Int32, Boolean, Boolean)	Reduce polygon count
	Reduce(Int32, Boolean, Int32, Boolean, CancellationToken, IProgressDouble, String)	Reduce polygon count
	Reduce(Int32, Boolean, Int32, Boolean, CancellationToken, IProgressDouble, String, Boolean)	Reduce polygon count
	ReleaseUnsafeLock	Updates the Mesh data with the information that was stored via the MeshUnsafeLock.
	RequireIterativeCleanup	Analyzes some meshes, and determines if a pass of CreateFromIterativeCleanup would change the array. All available cleanup steps are used. Currently available cleanup steps are: - mending of single precision coincidence even though double precision vertices differ. - union of nearly identical vertices, irrespectively of their origin. - removal of t-joints along edges.
	Rotate	Rotates the object about the specified axis. A positive rotation angle results in a counter-clockwise rotation about the axis (right hand rule). (Inherited from GeometryBase.)
	Scale	Scales the object by the specified factor. The scale is centered at the origin. (Inherited from GeometryBase.)
	SetCachedTextureCoordinates	Set cached texture coordinates using the specified mapping.
	SetTextureCoordinates(TextureMapping, Transform, Boolean)	Set texture coordinates using given mapping and applying given transform. Set lazy to false to generate texture coordinates right away.
	SetTextureCoordinates(TextureMapping, Transform, Boolean, Boolean)	Set texture coordinates using given mapping and applying given transform. Set lazy to false to generate texture coordinates right away.
	SetUserString	Attach a user string (key,value combination) to this geometry. (Inherited from GeometryBase.)
	Smooth(Double, Boolean, Boolean, Boolean, Boolean, SmoothingCoordinateSystem)	Smooths a mesh by averaging the positions of mesh vertices in a specified region.
	Smooth(Double, Boolean, Boolean, Boolean, Boolean, SmoothingCoordinateSystem, Plane)	Smooths a mesh by averaging the positions of mesh vertices in a specified region.
	Smooth(IEnumerableInt32, Double, Boolean, Boolean, Boolean, Boolean, SmoothingCoordinateSystem, Plane)	Smooths part of a mesh by averaging the positions of mesh vertices in a specified region.
	SolidOrientation	Determines orientation of a "solid" mesh.
	Split(Mesh)	Split a mesh with another mesh. Suggestion: upgrade to overload with tolerance.
	Split(IEnumerableMesh)	Split a mesh with a collection of meshes. Suggestion: upgrade to overload with tolerance. Does not split at coplanar intersections.
	Split(Plane)	Split a mesh by an infinite plane.
	Split(IEnumerableMesh, Double, Boolean, TextLog, CancellationToken, IProgressDouble)	Split a mesh with a collection of meshes.
	Split(IEnumerableMesh, Double, Boolean, Boolean, TextLog, CancellationToken, IProgressDouble)	Split a mesh with a collection of meshes.
	SplitDisjointPieces	Splits up the mesh into its unconnected pieces.
	SplitWithProjectedPolylines(IEnumerablePolylineCurve, Double)	Splits a mesh by adding edges in correspondence with input polylines, and divides the mesh at partitioned areas. Polyline segments that are measured not to be on the mesh will be ignored.
	SplitWithProjectedPolylines(IEnumerablePolylineCurve, Double, TextLog, CancellationToken, IProgressDouble)	Splits a mesh by adding edges in correspondence with input polylines, and divides the mesh at partitioned areas. Polyline segments that are measured not to be on the mesh will be ignored.
	ToJSON	Create a JSON string representation of this object (Inherited from CommonObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	Transform	Transforms the geometry. If the input Transform has a SimilarityType of OrientationReversing, you may want to consider flipping the transformed geometry after calling this function when it makes sense. For example, you may want to call Flip() on a Brep after transforming it. (Inherited from GeometryBase.)
	Translate(Vector3d)	Translates the object along the specified vector. (Inherited from GeometryBase.)
	Translate(Double, Double, Double)	Translates the object along the specified vector. (Inherited from GeometryBase.)
	UnifyNormals	Attempts to fix inconsistencies in the directions of mesh faces in a mesh. This function does not modify mesh vertex normals, it rearranges the mesh face winding and face normals to make them all consistent. Note, you may want to call Mesh.Normals.ComputeNormals() to recompute vertex normals after calling this functions.
	UnifyNormals(Boolean)	Attempts to fix inconsistencies in the directions of mesh faces in a mesh. This function does not modify mesh vertex normals, it rearranges the mesh face winding and face normals to make them all consistent. Note, you may want to call Mesh.Normals.ComputeNormals() to recompute vertex normals after calling this functions.
	Unweld	Makes sure that faces sharing an edge and having a difference of normal greater than or equal to angleToleranceRadians have unique vertexes along that edge, adding vertices if necessary.
	UnweldEdge	Adds creases to a smooth mesh by creating coincident vertices along selected edges.
	UnweldVertices	Ensures that faces sharing a common topological vertex have unique indices into the MeshVertexList collection.
	Volume	Compute volume of the mesh.
	Weld	Makes sure that faces sharing an edge and having a difference of normal greater than or equal to angleToleranceRadians share vertexes along that edge, vertex normals are averaged.
	WithDisplacement	Constructs new mesh from the current one, with displacement applied to it.
	WithEdgeSoftening	Constructs new mesh from the current one, with edge softening applied to it.
	WithShutLining	Constructs new mesh from the current one, with shut lining applied to it.

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Reference

Rhino.Geometry Namespace

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