2009

Unbinding Objects
If you decide that you do not want an object to be bound you can either turn
off the Bind Orientation and Bind Position boxes, or unbind the object from
its follow object.
■ If you turn off the binding options, you disable the effect of binding
without removing the binding to a follow object. This method is handy
if you decide to reposition a follow object after you have bound an object
to it.
■ If you unbind an object, it permanently removes the binding to a follow
object.
Controlling IK Precision (HD Solver)
Even with carefully defined joint precedence and joint parameters there are
many valid IK solutions for any placement of an end effector. You set position
and rotation thresholds to control IK precision and solution speed.
■ The threshold and iteration settings are found on the Motion panel on
the IK Controller Parameters Rollout, when the end effector is selected.
■ The threshold and iteration settings for the HD solver are also found on
the Inverse Kinematics tab of the Customize > Preferences dialog.
Position Threshold Sets how close the end effector has to get to the follow
object or cursor position to be considered a valid solution. The value expresses
a distance in the current unit system. Small values increase accuracy but take
longer to solve.
Rotation Threshold Sets how accurately the end effector has to match the
orientation of the follow object to be considered a valid solution. The value
expresses a rotation angle in degrees. Small values increase accuracy but take
longer to solve.
Iterations Sets the maximum number of times 3ds Max repeats the IK
calculations to find a valid solution. A high Iterations value increases the
chance that the software can calculate a valid solution, but takes longer to
complete. The following rules apply:
■ Calculations stop as soon as a valid solution is found, even if the maximum
number of iterations have not been performed.
Inverse Kinematics (IK) | 3425