Extract object sub-elements

The commands that extract parts of objects can be used to

Create curves based on the geometry of the object.
Open a hole or to separate a badly constructed surface from a polysurface in order to repair it.
Separate the render or analysis mesh from an object in order to use the mesh for a different purpose such as rapid prototyping or rendering.
Remove mesh faces in order to repair problems with a mesh.

Extract curves from a surface or polysurface

ExtractControlPolygon

Fit a polyline through curve control points or a mesh through surface control points.

ExtractCurvatureGraph

Duplicate a curve's curvature graph.

ExtractIsocurve

Duplicate surface isoparametric curves.

ExtractPt

Duplicate curve control or edit points, surface control points, and mesh vertices.

ExtractSubCrv

Separate or duplicate polycurve segments.

ExtractWireframe

Duplicate surface or polysurface edge and isoparametric curves.

Extract surfaces from a polysurface

ExtractBadSrf

Separate surfaces with errors from a polysurface.

ExtractSrf

Separate or duplicate a polysurface face.

Extract mesh faces and edges

ExtractConnectedMeshFaces

Separate mesh faces connected to a face.

ExtractDuplicateMeshFaces

Separate duplicated faces from a mesh.

ExtractMeshEdges

Separate faces from the parent mesh determined by a draft angle or weld status.

ExtractMeshFaces

Separate faces from a mesh.

ExtractMeshFacesByArea

Separate faces from a mesh by area.

ExtractMeshFacesByAspectRatio

Separate faces from a mesh by aspect ratio.

ExtractMeshFacesByDraftAngle

Separate faces from a mesh by a draft angle or weld status.

ExtractMeshFacesByEdgeLength

Separate faces from a mesh by edge length.

ExtractMeshPart

Separate faces from a mesh that are bounded by unwelded edges.

ExtractNonManifoldMeshEdges

Separate non-manifold faces from a mesh.

Extract object meshes

ExtractAnalysisMesh

Duplicate an object's analysis mesh.

ExtractRenderMesh

Duplicate the render mesh.

See also

Collapse mesh faces and vertices

White paper: Scan, Cleanup, Remodel

Rhino for Mac © 2010-2017 Robert McNeel & Associates. 24-Oct-2017