8

974 Chapter 9: Surface Modeling
Click Extr ude again or r ight-click to end the
operation.
Bevel—Clickthisbutton,andthendraganypatch
to extrude it interactively, then click and release
the mouse button, and dr ag again to bevel the
extrusion. Hold down the SHIFT key during this
operation to create a new element.
• When the mouse cursor is over a selected patch,
it changes to a Bevel cursor.
• With multiple patches selected, dragging on
any one be vels al l selected patches equal ly.
• Youcandragotherpatchesinturntobevel
them while the Bevel button is active. Click
Be vel again or right-click to end the operation.
Original patch (top) and inward and outward extrusions
Extrusion—This spinner lets you extrude selected
patches outward or inward, depending on whether
the va lue is positive or negative.
Outlining—This spinner lets you scale selected
patchesbiggerorsmaller,dependingonwhether
the value is positive or negative. It is normally
used after an extrusion for beveling the extruded
patches.
Nor mal—With Normal set to Gr oup ,extrusion
takes place along the averaged normal of each
contiguous group of patches. If you extrude
multiples of such groups, each group moves along
its own averaged normal. If Normal is set to Local
(thedefault),extrusiontakesplacealongeach
selected patch’s normal.
Bevel Smoothing—These settings let you set
the shape of the intersection between the
surface created by a b eveling operation and the
neighboring patches. The shapes are determined
bythehandleconfigurationsofverticesatthe
intersections. Sta r t refers to the intersection
between the sides and the patches surrounding
the beveled patch. En d refers to the intersection
between the sides and the b e veled patch or patches.
The following settings are available for each:
•
Smooth—Vertex handles are set so the angles
between the new p atches and their neighbors
are relatively small.
•
Linear—Vertex handles are set to create linear
transitions.
•
None—Vertex handles are not modified.
Wa rni ng: Set Bevel Smoothing before the bevel is
per formed; changing the setting has no effect on
existing beveled patches.
Sur f ace group
Vi ew Steps —Controls the grid resolut ion of the
patch model surface as depicted in the viewports.
Render S teps—Controls the g rid resolution of the
patch model surface when rendered.
Show Interior Edges—Enables the display of the
patch object’s interior edges in wireframe views.
When off, only the object’s outline is v isible. Turn
on to simplify the display for faster feedback.