Datasheet

49
CHAPTER 1
CHAPTER 2
CHAPTER 3
CHAPTER 4
CHAPTER 5
CHAPTER 6
CHAPTER 7
CHAPTER 8
CHAPTER 9
CHAPTER 10
CHAPTER 11
CHAPTER 12
CHAPTER 13
CHAPTER 14
APPENDICES
INDEX
The torus is even more interesting
with Profi le Cut. Doing a profi le cut of
E = 0.65 will give you a shape with a
round base. I like to stretch this shape
along the z-axis and use it as a low-prim
streetlamp. Now set Hollow to 95 and
set Profi le Cut to E = 0.55. You’ll start
to see an hourglass shape (Figure 3.10),
which you can adjust using the Hole Size
Y value.
■ RADIUS DELTA AND REVOLUTIONS
Radius Delta is available only for radially
extruded prims. It lets you vary the
distance for the 2D base shapes from
the prim’s z-axis. The result looks
something like a scroll (Figure 3.11).
To see this, rez a tube, set the Hole
Size Y value to 0.05, and set the
Radius Delta to 0.947.
This scroll is rolled up for only one
revolution. If you want to roll the scroll
up more, you will need to change the
Revolutions setting; however, there are
some catches. First, you’re allowed a
maximum of 4.00 revolutions. Second,
the moment you change the revolutions,
the Skew value for the prim is adjusted
automatically to prevent any part of the
prim from overlapping with itself. This
creates a prim that looks more like a
spring or a telephone cord than a scroll.
To see the effect of Revolutions on Skew, rez a tube and change the Revolutions value from 1.00 to
1.01. You will notice that the prim instantly sets its Skew to 0.50.
Figure 3.10: This torus has some sexy curves!
Figure 3.11: A scroll created by adjusting the Radius
Delta of a tube
TIP
Although some edit features are available only for certain prims, you can sometimes carry those
effects over to other kinds of prims. For example, if you apply a dimple to a sphere then change
the prim type to box, you will be left with a box that is smaller than the size values indicate. (See
the section “Building a Tiny Box” for details.) Feel free to experiment with different settings, and
then switch prim type to get results that go beyond even Linden Lab’s expectations.
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