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684 Chapter 12: Animation
6.
AdjustthePinRange,andthenclickthePin
button to move the object to follow the tracker.
Inter face
Choose Track er —Shows all the cur rent trackers as
set up in the Motion Trackers rollout. Use this to
selectthetrackerwhosefeaturemovementsyou
will use to control the pinned 3ds Max object. The
feature must have been tracked already over the
frames you want to use, with the Track and/or
Movie Stepper rollouts. Note that the accuracy
of the pinning is determined by the accuracy
of the m atch, s o subpixel tracking is highly
recommended.
Object To Pi n—Lets you choose the object in
3ds Max scene for pinning and animating. By
default the tracking object associated with the
selected tracker is preloaded into this button. You
can use this picker if you wish to pin a different
object.
Pin Range group
Movie Star t—Themovieframefromwhichtostart
using tracked feature positions.
Animation Star t—The frame in the 3ds Max
animation at which to start keyframing the move
of the pinned object.
Fr ame Cou n t —The number of frames to animate.
There must be enough t r acked posit ions in the
selected tracker to cover this number of f rames.
Reset R anges—Reloads the maximum frame
number and count ranges into the above spinners
from the current movie and 3ds Max scene
settings.
Pin Space group
Letsyouselecttheplaneofmotioninwhichthe
keyframed pinning will occur.
Screen—Moves and animates the pinned object
in the plane of the screen at its current depth in
the scene. This is equivalent to d ragging an object
around in the Screen reference coordinate system
in 3ds Max.
Gri d—Moves and animates the pinned object in
the plane of the currently active grid. This lets you
set up an arbitrar y plane of motion for the pinning
by constructing a grid helper object in the desired
place and making it the active grid. If you don’t
have a grid helper set up and active, the pinning
will occur on the 3ds Max Home Grid.
Pin Mode Group
Lets you choose between two different pinning
modes: absolute and relative.
Absolute—Places and moves the pinned object
exactly over the tracked feature. If combined with
grid space, the object is also placed and moved
directlyontheactivegridplane.