Conic Curve

Used to place a conic section — a hyperbola, parabola, or partial ellipse — as a third-order uniform rational B-spline curve with three poles.

You can access this tool from the following:

Setting	Description
Type	Sets whether the conic section is a Hyperbola, Parabola, or Ellipse.
Input By	Sets how the curve is defined. Points — Lets you create the curve by defining points at the start, finish, and shoulder of the curve. Tangents — Lets you create the curve by defining points at the start, finish, and intersection point of the curve's tangent lines.
Rho	The range setting is variable for Hyperbola and Partial Ellipses only and its value depends on the Type: If Hyperbola, 0.5 < ρ < 1.0 If Parabola, ρ = 0.5. If Partial Ellipse, 0.0 < ρ < 0.5.

Key-in: PLACE CONIC

Tip: To construct a parabolic fillet to two elements, use the Construct Parabolic Fillet tool in the Fillets toolbox.

Tip: To place a partial ellipse as an arc element, use the Place Half Ellipse tool or Place Quarter Ellipse tool in the Arcs toolbox.