Regenerating the end surface

Once the radii curve (and optionally eccentricity curve) has been defined, the end surface can be created by selecting End Surfaces > Generate End Surface or <Shift+S>.

The display options for the end surface are the same as for the actual hull surface (see Curves Graphical Reference surface display options in PACE), and are controlled using the same controls. Isophotes are especially useful in order to create a fair end surface, which is essential if the curves formed from it are to be fair (see Assessing surface fairness).

Typically, the user will edit the radii and/or eccentricity curves guided by visual feedback regarding the shape of the end surface. The choice of when to regenerate the end surface can be set from the Advanced page of the End Surface Options dialog (launched by selecting End Surfaces >\ Options... . There are three options:

• Manually - the end surface is regenerated from the defining curves when the user selects End Surfaces \ Generate End Surface or clicks <Shift+S>.

• End of edit - the end surface is regenerated when the user releases the LMB after dragging a data point, or after nudging a data point, on a defining curve.

• Real time - the end surface is regenerated continuously as a data point is dragged, or nudging with an arrow key held down. This may not work well if your computer is slow, and/or the defining curves have a lot of data points in them.

The current end surface can be deleted by selecting End Surfaces > Delete End Surface . This may be useful if, for example, you wish to update the shape of waterlines without waterline endings. Provided the defining curves are not deleted, the end surface can be easily regenerated using the procedure described above.