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  Documentation Clarification: Control Points

DC0001: Documentation Clarification: Control Points

Control Points

A Control Point has a position but no fixed frame or timing. It is mainly used to deform a trajectory. There are no velocity handles available on a control point. The velocity segments are set between keyframes only, making curves and trajectories much smoother.    



A Control Point will not show in the Timeline View because it has no precise frame to be displayed on. It will appear on the function curve and in the Camera View. There are different ways to add control points:
• By displaying the peg trajectory in the Camera View and pressing the keyboard shortcut [P].
• By adding a keyframe on the function curve and disabling the Lock in Time option.
The Control Point is displayed as a circle.  

You can display your trajectories in the Camera, Top and Side Views to better understand the way that your elements move in your scene. This also makes it easier to modify them. You can display a peg’s control to be able to see where your elements are going, modify the curve and add keyframes and control points.  

To add a Control Point on a trajectory:
1. In the Timeline or Network View, select the peg you want to add the control point on.
2. To display the Peg’s control parameters:
· In the Camera View, right-click (Windows) or [Ctrl]-click (Mac OS X) and select Show Control Parameters to display the trajectory. The default keyboard shortcut is [C].  

The Trajectory appears in the Camera View.  



3. You can add control points on a 3D path trajectory by placing your mouse where you want to add the point and pressing the keyboard shortcut [P].
 

· Using the keyboard shortcut [F6] you can add a keyframe to the Current frame.
· Using the keyboard shortcut [Alt] + [L] you can switch a selected point between Control Point and Keyframe.



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