Rho value is the ratio of the distance of the conic center point to shoulder point, over the distance of the center point to the slope control point. This tool creates a conic by specifying the start and endpoints plus specification of a rho value.
TurboCAD provides three methods for creating conics that include 2, 3, and 4-point forms. A graphical description of the relative points is shown below. The form consists of a start and end point plus a variety of means to specify the tangency. TurboCAD uses the Conic form popular in the aerospace industry. From left to right along the Conic tool palette they are: There are eight methods for creating conics. Conic curves or conic sections form the most general form of quadratic curves.
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