Model Submenu - Creating Hull Curve

This function creates hull curves from temporary geometry curves. The resulting hull curve is simply a temporary curve with a user-defined name. The contents of the select list will

affect the behaviour of the function in the same way as for the Seam/ Butt creation function, with the only difference that hull curves cannot be used.

If applicable, this function also updates the frame, buttock and waterline tables according to the input. The conditions for this updating to take place are:

• The curve name must begin with the prefix for frame, buttock or waterline curves, respectively, as setup in the project.

• The rest of the curve name must consist of an integer not greater than 32767.

• The curve must be defined in the principal plane corresponding to the prefix given in the curve name.

Thus, for example, if a curve is defined in the plane X = FR40 and given the name ESX40, the frame table will be updated with this curve (given that the frame curve prefix is ESX).

The form used for input has the following contents:

Figure 2:15. Form for creation and modification of hull curves.

The Name field: The name of the hull curve to create.

The Auto Name check box: This button is visible only when the select list contains more

than one curve. If the button is "on" then all the hull curves after the first one are

automatically numbered (in steps of 1). The Name field contains the name of the first curve.

This name must have a numerical part surrounded by the characters "<" and ">" to define what to increment. If this is not the case, an ordinal number will be added at the end of the name as given in the Name field, starting with 1 for the first hull curve.

Example:

AB<10(5)20>C will generate three curves named AB10C, AB15C and AB20C. Note that in case a repetition term is used, the number of curve names generated must match the number of curves in the select list.

The Surface field: The surface in which the hull curve is defined. This field is for information only and cannot be changed.

The fields Xmin, Xmax, Ymin, Ymax, Zmin and Zmax: The box defining the hull curve limits. Initially set to the corresponding values of the default box.

When you press Ok, a hull curve with the given name is created. If a hull curve with the given name should already exist, you will have a question whether it is OK to override the

existing hull curve. You have the following options:

• Press the Yes button to create the hull curve with the name as given. The old hull curve will be lost.

• Press the No or Cancel button to give the hull curve another name.

The Cancel button in the form makes the system exit the Hull Curve function.

The Modify Curve button: This button lets you change the definition that the hull curve is based upon. This in turn is done the same way as when you modify a temporary curve which is described in a later section. This button is only displayed when modifying an existing hull curve.