3
Table Of Contents
- Motion 3 Supplemental Documentation
- Contents
- 3D Compositing
- Motion Tracking
- About Motion Tracking
- How a Tracker Works
- Motion Tracking Behaviors
- Shape Track Points Behavior
- Track Parameter Behavior
- Motion Tracking Workflows
- Adjusting the Onscreen Trackers
- Strategies for Better Tracking
- Finding a Good Reference Pattern
- Manually Coaxing Your Track
- Manually Modifying Tracks
- Converting Tracks to Keyframes
- When Good Tracks Go Bad
- Smoothing Tracking Keyframe Curves
- Preserving Image Quality
- Asking Motion for a Hint
- Giving Motion a Hint
- Tracking Images with Perspective, Scale, or Rotational Shifts
- Tracking Obscured or Off-Frame Points
- Tracking Retimed Footage
- Troubleshooting Stabilizing Effects
- Removing Black Borders Introduced by Stabilizing
- Some General Guidelines
- Tracking and Groups
- Saving Tracks
- Motion Tracking Behavior Parameters
78 Chapter 2 Motion Tracking
Using an Object as the Animation Source
This section provides a brief overview of using the Track Points behavior to apply the
animation of an object to the vertices of a shape or mask. For this workflow, your
project must contain an object that is animated with keyframes or behaviors.
To apply the animation of an object to the control points of a shape or mask:
1 Apply the Track Points behavior to the object you want to animate.
If an animated object exists beneath the object with the applied Track Points behavior
in the Layers list, the animation of the lower object is automatically applied to the Track
Points behavior, as displayed in the Source well in the HUD and Inspector.
In this example, the Track Points behavior is applied to the Bezier shape, and a line used
as the source animation is animated with the Spin behavior.
Note: To reference another animated object, drag that object to the Track Points
behavior’s Source well or directly to the behavior in the Layers list.
The spinning animation of the line is applied to the Bezier shape. The tangents remain
aligned at their original angles along the shape.
2 To align the tangents to the transformation of the source object, turn on the Align
Tangents checkbox in the Behaviors tab of the Inspector.
Bezier shape with applied Track Points behavior
Source object
HUD’s Source well displays the
referenced source object.