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62 Chapter 11: Space Warps and Particle Systems
Procedure
To create a motor space warp:
1. OntheCreatepanel,clickSpaceWarps>
Forces > Motor. Choose Forces from the list,
then on the Object Type rollout, click Motor.
2. Click and drag in a viewport to define the size.
The Motor warp appears as a box-shaped icon
with an arrow indicating the direction of the
torque.
Inter face
Timing group
On Time/Off Time—Thenumbersoftheframesin
which the space war p beg ins and ends its effect.
Because Motor moves the objects to which it’s
applied over t ime, no keyfr ames are created.
Strength Control group
Basic Torque—The amount of force exerted by the
space warp.
N-m/Lb-ft /Lb-i n —Specify the unit of measure for
the Basic Torque sett ing, using common world
measurements of torque. N-m stands for Newton
meters, Lb-ft stands for pound-force feet, and
Lb-in stands for pound-force inches.
Feedback On—When on, the force varies
depending on the speed of the affected objects
relative to the specified Target Speed. When off,
the force remains constant, regardless of the speed
of the affected objects.
Reversible—When on, if the object’s speed exceeds
the Target Speed setting, the force is reversed.
Avai lable only if you turn on Feedback On.
Target Revs—Specifies the maximum revolutions
before the feedback takes effect. Speed is specified
in units traveled per frame. Available only if you
turn on Feedback On.
RPH/RPM/RPS—Specifies the units of measure for
Target Revs in revolutions per hour, minute, or
second. Avai lable only if you turn on Feedback On.
Gain—Specifies how quickly the force adjusts to
approaching the target speed. If set to 100%, the
correction is immediate. If set lower, a slower and
"looser" response occurs. Avai lable only if you
turn on Feedback On.
Note: Setting Gain above 100% can result in
over-correction, but is sometimes necessary to
overcome damping f rom other system sett ings,
such as IK damping.