Conic

The Conic command draws a conic section curve.

Steps

1. Pick the start.
2. Pick the end.
3. Pick the apex.

This location partially defines the plane for the conic.

4. Pick a location for the conic to pass through to define its curvature.

Or, type a the rho value (a number greater than 0 and less than 1), and press Enter.

Note: The status bar displays the rho value during the command.

Command-line options

Apex

Pick the apex ("top" control point).

Tangent

Select a curve and then drag the tangent indicator to the desired location.

Perpendicular

Select a curve and then drag the perpendicular indicator to the desired location.

Types of conics

Parabola

The intersection of a right circular cone and a plane that passes through the side of the cone and the base of the cone.

Rho value of 0.5.

Hyperbola

The intersection of a right circular cone and a plane perpendicular to the cone's base.

Rho values greater than 0.5 and less than 1.

See also

Draw lines and curves

Hyperbola

Draw a hyperbolic curve from focus points, vertices, or coefficient.

Parabola

Draw a parabolic curve from focus and vertex or endpoint.


Rhinoceros 5 © 2010-2015 Robert McNeel & Associates. 17-Sep-2015