Create surfaces

A surface is like a rectangular stretchy rubber sheet. The NURBS form can represent simple shapes, such as planes and cylinders, as well as free-form, sculptured surfaces.

All surface creation commands in Rhino result in the same object: a NURBS surface. Rhino has many tools for constructing surfaces directly or from existing curves.

All NURBS surfaces have an inherently rectangular organization.

Even a closed surface such as a cylinder is like a rectangular piece of paper that has been rolled up so two opposite edges are touching. The place where the edges come together is called the seam. If a surface does not have a rectangular shape, either it has been trimmed or the control points on the edges have been moved.

Closed and open surfaces

A surface can be open or closed. An open cylinder is closed in one direction.

A torus (donut shape) is closed in two directions.

Draw a surface

Plane

Draw a rectangular planar surface.

Picture

Draw a rectangular planar surface with a bitmap texture.

Create a surface from points

PlaneThroughPt

Fit a rectangular planar surface through points.

SrfControlPtGrid

Draw a surface from a grid of points that represent surface control points.

SrfPt

Draw a surface from three or four corner points.

SrfPtGrid

Draw a surface from a grid of points that lie on the surface.

Create a surface from curves

DevLoft

Creates a single developable surface between two rails.

ExtrudeCrv

Drive closed planar curves in a straight line.

EdgeSrf

Create a surface from two, three, or four curves.

Fin

Extrude a curve on a surface in the surface normal direction.

Loft

Fit a surface through profile curves that define the surface shape.

NetworkSrf

Fit a surface through a network of crossing curves.

Patch

Fit a surface through curves and point objects.

PlanarSrf

Create a planar surface from planar curves.

RailRevolve

Revolve a profile curve around an axis and along a rail curve.

Revolve

Create a surface by revolving a profile curve around an axis.

Ribbon

Offset a curve and create a ruled surface between the curves.

Sweep1

Fit a surface through profile curves and one edge curve.

Sweep2

Fit a surface through profile curves and two edge curves.

Create a surface from other surfaces

CutPlane

Create planar surfaces through objects at specified locations.

Drape

Create a surface through the intersections of objects and points projected toward the construction plane.

OffsetSrf

Copy a surface parallel to the original.

VariableOffsetSrf

Copy a surface specified varying distances from the original surface.

UnrollSrf

Flatten (develop) a surface or polysurface with curvature in one direction to a planar surface.

Other methods

Heightfield

Create a surface based on gray-scale color values in an image file.

MeshToNURB

Duplicate each mesh face with a NURBS surface.

Symmetry

Mirror a copy of a curve or surface with continuity.

See also

Edit surfaces

Split and trim curves and surfaces

 

 

 

Rhinoceros 6 © 2010-2019 Robert McNeel & Associates. 16-May-2019