The Directrix Form

This form is used for defining the directrix of the general cylinder. It looks as follows:

Figure 2:38. Form for creation of general cylinder directrix.

The Coord 1 field: The U co-ordinate of the next point defining the directrix.

The Coord 2 field: The V co-ordinate of the next point defining the directrix.

Depending on whether the generator axis has been set to x, y or z, the co-ordinates to give for each point is y (Coord 1) and z (Coord 2), x (Coord 1) and z (Coord 2) or x (Coord 1) and y (Coord 2), respectively.

The Indicate button: Define the points by picking directly in a view instead of keying in the co-ordinates. This is only possible in views perpendicular to the defined generator, for example, in a view showing the plane YZ if the generator is parallel to the x-axis. By choosing Options while in this mode, you will get the Directrix Form back for defining further points by keying in co-ordinates.

The Ok button: Confirm input and continue to the next form. This button can only be used after the last point.

The Apply button: Confirm the given coordinates and go on with the next point.

The Cancel button: Exit the function.

The Remove Point button: This button lets you remove previously defined points making up the directrix. Press this button to remove the cylinder point indicated directly after the Modify function was invoked and Directrix was chosen in the pop-up menu for cylinder modification. This button is only displayed when modifying an existing general cylinder.