ToSubD

Toolbar Menu

Geometry Fix

SubD Tools

SubD

From Object

The ToSubD command converts supported object types into SubD objects.

Input

Mesh, Extrusion, Surface, Sub-surface

Command-line options

UseMesh
ControlPoints

Turns mesh vertices into SubD control points (left).

Location

Turns mesh vertices into SubD surface points (right).

Conceptually, this is the difference between what the Curve and InterpCrv commands do. The Curve command turns input points into the curve's control points. The InterpCrv command creates a curve to pass the input points.

MeshCreases

Specifies whether unwelded mesh edges (red) will be turned into creased edges.

1) Input mesh 2) MeshCreases=Yes 3) MeshCreases=No
MeshCorners

Specifies whether the boundary corner vertex of a quad mesh face will be creased or smoothed.

1) Input mesh 2) MeshCorners=Yes 3) MeshCorners=No
UseSurface
ControlPoints

Turns NURBS surface control points into SubD control points.

Use this option if you are doing "Class A" modeling and need to join separate SubDs into a single SubD.

Location

The output SubD has the best fit to the input NURBS surface. Extra faces might be inserted.

SurfaceCorners

Specifies whether NURBS surface corners will turn into creased or smooth SubD vertices.

1) Input NURBS surface 2) SurfaceCorners=Yes 3) SurfaceCorners=No
DeleteInput

Deletes (Yes) or keeps (No) the input object.

  • When a surface is SubD friendly (left), the SubD will match to the input surface shape.
  • Trims of a surface or sub-surface will be lost in the SubD.
  • Sub-surfaces of a polysurface will be converted individually.
  • Non-manifold mesh edges and related faces will be removed.

See Also

SubD structure

SubDivide

Toolbar Menu

SubD Tools

Mesh / SubD

Edit Tools > Subdivide

 

The SubDivide command applies iterations of the Catmull-Clark subdivision to whole Mesh/SubD objects or selected faces.

Input

  • Mesh/SubD face (Select with Ctrl+Shift+Click)

Steps

  1. Start the SubDivide command.

  2. Select a Mesh or SubD.

    Use Ctrl+Shift+Click to select Mesh or SubD faces.

Command-line options

DeleteInput

Deletes (Yes) or keeps (No) the input object.

SelSubD

Toolbar Menu

Select SubD

SubD Tools

Edit

Select Objects > SubD objects

The SelSubD command selects all Rhino SubD objects in the model that are not locked or hidden.

SelOpenSubD

Toolbar Menu

Not on toolbars.

Not on menus.

The SelOpenSubD command selects all Rhino SubD objects in the model that have a boundary and are not locked or hidden.

SelClosedSubD

Toolbar Menu

Not on toolbars.

Not on menus.

The SelClosedSubD command selects all Rhino SubD objects in the model that do not have a boundary and are not locked or hidden.