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Advanced Options of Conical Curves |
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Advanced options are available in all commands for building conical curves.
Base plane
The base plane is the plane on which the conical curve is placed.
By default, the position of the plane of the conical curve is determined automatically by the objects specified for its construction. In this case, the field Base Plane in the group of elements Curve Plane on the Parameter Panel contains the word Auto Determination.
The curve plane is determined in the following way.
•In the commands Conical curve by vertex and discriminant and Conical curve by a vertex and a point on the curve The plane of the curve is a plane passing through the extreme points of the curve and the point of intersection of the tangents.
•In the commands Conical curve by tangents and discriminant and Conical curve by tangents and a point on the curve The plane of the curve is the plane passing through the extreme points of the curve parallel to the tangents defined by the guiding object or vector.
If both tangents are set by a guiding object or vector, then the plane is constructed parallel to the first of the specified tangents. The second tangent is projected onto the curve plane, and the resulting projection sets the tangent direction to the conical curve at the other extreme point.
You can change the base plane of the curve, if required. All specified objects will be projected onto a new plane, the conical curve will be built according to these projections.
To change the base plane, click in the Base Plane field, then specify the required plane or a flat face. The name of the base plane will appear in the field of the same name Base Plane.
The construction plane of the desired position can be built without interrupting the process of creating a conical curve. To do this, click the Draw plane button 
located to the right of the Base Plane field. Will start Creating a plane sub-process. Perform the required building steps and finish the plane creation. The created plane will be automatically selected as the plane to place a conical curve.
Coordinate System
To select the coordinate system relative to which the conical curve will be placed, use the elements of the Coordinate System section on the Parameter Panel. Details...
If you need to keep the position of the conical curve in the absolute coordinate system of the model after it is transferred to another coordinate system, enable the option Maintain Position.
Properties
You cat set the name, Colors and Display parameters The elements of section Properties on the Parameters panel serve the conic curve.
