9

1142 Chapter 9: Surface Modeling
At the Surface sub-object level, the lef t a nd
right arrow keys move forward and backward
through individual surfaces in the order they
were created. The up and down arrows are
equivalent to left and right.
You can also use the
H keyboard shortcut (while
theKeyboardShortcutOverrideToggleison)
todisplayadialogandselectsurfacesbyname.
Ctrl+H displays only the names of surfaces
directly beneath the mouse cursor.
To delete a surface:
• Select the surface and then click Delete.
Keyboard shortcut:
Delete
Tomakeasurfacealoft:
1.
Select the surface and then click Mak e Loft. A
Make Loft dialog (page 1–1234) is displayed.
2. Use the Make Loft dialog controls to choose the
settings for the new surface, a nd then click OK.
To brea k a s urf ace:
1.
TurnonBreakRow,BreakCol.,orBreakBoth,
and then drag over the surface.
One or two blue cur ves appear on the surface to
indicate where the break will occur.
2. When you have dragged to the location you
want to break, click t he surface.
Note: If you break a dependent surface, the new
"broken" surfaces are made independent.
You cannot break a trimmed surface.
To extend a surface:
1.
Turn on E xtend .
2. Move the mouse over the surface w ithout
depressing the mouse button. The edge that
will be extended is highlighted in blue.
3. Whentheedgeyouwanttoextendis
highlighted, press the mouse button, and then
drag vertically to increase the length of the
surface.
The surface extension is invalid and disappears if it
would cause the surface to intersect itself or if the
edge of the surface touches itself but is not closed.
For example, you can’t extend the top of a cylinder.
To join two sur faces:
1.
In a NURBS object that contains two surface
sub-objects, turn on Join.
2. If the gap between the surfaces is smal l (less
than about 30 units), set the Tolerance value
greater than the distance of the gap.
3. Click one surface near the edge that you want
to connect. The edge that will b e connected is
highlighted in blue. Drag to choose the edge
you want to connect. Without releasing the
mouse button, drag to the other surface. The
edge of the other surface is a lso highlig hted in
blue. Drag on the other surface to choose the
edge to connect, and then release the mouse
button.
The surface that owns the highlighted edge is
highlighted in yellow, to help you distinguish