The SubDCylinder command creates a Subdivision cylinder object.

Steps

1. Draw the base circle.

2. Pick a location or type a number to set the height.

   The DirectionConstraint options define the positive height differently.

Command-line options

DirectionConstraint

Direction constraints restrict the direction of the cylinder.

1. None: Pick or type a number to set the height.

Use elevator mode, object snaps, or other modeling aids to help picking a location.

The cursor location defines the positive direction when you type a number to set the height.

2. Vertical

Creates a cylinder perpendicular to the construction plane.

The CPlane +Z direction defines the positive direction when you type a number to set the height.

AroundCurve

Draws the base circle perpendicular to the picked point on a curve. The center line of the cylinder will be tangent to the curve.

The curve direction defines the positive direction when you type a number to set the height.

Solid

Caps the top and bottom openings or leave them open.

Radius

Draws the base circle by picking the center point and a radius point.

Diameter - Circumference - Area - ProjectOsnap

2Point

Draws the base circle from two opposite points.

3Point

Draws the base circle through three points.

Radius

Tangent

Draws the base circle tangent to one, two, or three curves.

Point - FromFirstPoint - Radius

FitPoints

Draws the base circle by fitting to selected points, control points, or mesh vertices.

AroundFaces

The number of faces around the circumference.

VerticalFaces

The number of faces in the vertical direction.

BothSides

Creates a cylinder symmetrical across the base circle. The height of the cylinder is twice as long as you specify.

CapFaceStyle (Tri/Quad)

Select to use triangle or quad faces to fill the top and bottom openings.

For more information, please refer to the Rhino documentation.