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662 Chapter 12: Animation
Envelope Parameters group
Specifies the time over which the envelope of the
action ta kes effect, relative to the key pressing and
release.
Attack —Displays the time it takes after pressing
the key for the value to reach its m aximum level.
Decay—Displaysthetimeittakesafterhaving
reached m aximum for the value to fall to that
specified by the Sustain spinner.
Sustain—After the Att a ck and Dec ay, the value
specified here is sustained until you release the key.
Release—After releasing the key, this is the t ime it
takes for the value to fade out to zero.
Parameter Scaling Area—S ets the scale of the
envelope and the range of the output value.
Time—Specifies the scale of the Attack, Decay,
and Release parameters. The value represents
the number of seconds contained in 1 unit. For
example, if this value is 1.0, then an Attack value
of 1.0 equals 1 second.
Range—Sets the max imum output va lue of the
controller.
Note: This controller ignores the state of the Ctrl ,
Alt ,and Shif t keys.
Tip: Because a single keyboard key can only
generate either a positive or negative value, if you
want to control both directions of a Bend Angle,
for example, use a List controller. First, make sure
there’s a standard controller (such as a Bezier
cont roller) assigned first in the list to maintain the
center position. Then add two Keyboard Motion
Capturecontrollerstothelist(oneassignedto
onekey,andtheotherassignedtoadifferentkey.)
Settherangeofonetothepositiveextentandthe
range of the other to the negative extent.
Joystick Input Device rollout
The Joystick Input Dev ice driver was designed for
the Microsoft Sidewinder joystick, which contains
more controls than the standard joystick. You can
usethisdevicedriverforstandardjoysticksaswell.
Joystick Axis group
X, Y, Z—Specifies which joystick direction drives
the animation. (Standard joysticks provide X and
Y axes only. The Sidewinder provides the Z axis
when you twist the joystick.)
Throttle—On the Sidewinder, th is is a slider next
to the stick.
Scale—Scalestherelativeeffectofthejoystick
action to the animation response (Spinner Value:
float, 0 to 999,999)
Flip—Flips the direction of the response.
Accumulate—When turned off, the joystick
position represents an absolute position, and