Conic from 3 Positions
KeyCreator \ Create \ Conic \ Conic-from-3-Positions

Location: Create>Conic>Conic from 3 Positions

Use this feature to create a conic based on indicated positions for three points on the conic and the slope of the conic at two of the indicated positions.

When creating this type of conic, keep the following things in mind:

  • You cannot indicate coincident positions.

  • For all options, except Five Positions and Six Coefficients, definition of the conic must include the slope of the conic at one or two of the indicated positions. For more information, see Defining the Slope.

  • You cannot direct the tangent vector that defines the slope of the conic at a selected position toward any of the other positions that you indicated in defining the entity.

  • In 2D construction mode, the indicated points and the slope's current construction plane are projected. It creates the conic in the current construction view, at the depth that was active when you defined the second slope.

  • In 3D construction mode, the conic is created in the plane that is defined by the three indicated positions. It projects the tangent vectors to this plane.

Using the Function:

  1. Select Conic from 3 Positions from the Create>Conic submenu.

  2. Indicate the start, second, and end positions of the conic.

  3. Enter the point number to assign the first slope to.

  4. Define the first slope.

  5. Enter the point number to assign the second slope to.

  6. Define the second slope.