Arc

Draws an arc curve.

Steps:

  • Follow the prompts for the selected option. If no option is specified, the default option is used.

Options

Default (Center/Angle)

Creates an arc using the arc’s center location and an angle.

  1. Pick
    the center of the arc’s radius.

  2. Pick the start of the arc.

  3. Pick the end point of the arc, or, type the angle for the arc.

Tilted

Draws the arc in 3-D space, off the construction plane.

  1. Pick
    the start that is not on the construction plane.

  2. Pick an orientation.

Deformable

Creates an arc-shaped NURBS curve

.

StartPoint

Draws an arc from start point, end point, and a point on the arc.

  1. Pick
    the start of the arc.

  2. Pick the end of the arc.

  3. Pick a point along the arc.

Options

Direction

  1. Pick
    the tangent direction at the start of the arc.

  2. Pick the end of the arc.

ThroughPoint

  1. Pick
    a point along the arc to pass through.

  2. Pick the end of the arc.

Tangent

Draw an arc of specified radius tangent to two curves.

  1. Drag the indicator and pick
    the first tangent curve.

  2. Drag the indicator and pick the second tangent curve, or type a radius.

  3. Drag the indicator and pick the third tangent curve.

  4. At the Choose arc prompt, move your mouse to view the possible arcs and click to select.

Options

Point

Releases the command from the tangent constraint.

FromFirstPoint

Constrains the cursor to the picked location on the first tangent curve.

Radius

The arc is restricted to the specified radius. If a tangent point exists on the second curve that meets the radius requirement, the tangent constraint will appear at that point as you drag the arc around.

Extension

Extends a curve with an arc.

  1. Select a curve near the end.

  2. Pick the end point of the arc.

Option

Center

  1. Pick the center of the arc extension.

  2. Pick the end point of the arc.

Notes

  • To draw an arc extension and join it in one step, use the Extend
    command.

  • The center point is constrained to a plane perpendicular to the curve end. If the extension is drawn in a view perpendicular to the constraint plane, the input will be automatically locked parallel to the construction plane
    .

  • In other views Rhino tries to make sure one of the ortho
    directions is parallel to the construction plane
    . Press the Shift

    key when making the pick to maintain the ortho direction.

Rhinoceros Arc Arc

Arc > Arc: Center, Start, Angle

Main1 > Arc: Center, Start, Angle

Rhinoceros Menu2 Arc

Curve > Arc > Center, Start, Angle

Rhinoceros Gray Book Open Arc Related topics…

Arc