When you first activate media or access Action, the media's surface is set to Flat by default. In Action, you can also represent a clip using custom bilinear or bicubic surfaces.
To change the shape of a surface:
This is the simplest surface. It is added to the scene by default the first time you enter Action with a Front, Back, and Matte. When working with a Stereo Object, Flat is the only shape available. |
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You can animate the shape of a bilinear surface by changing the position of the corners. |
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You use the vertices—or handles—on bilinear and bicubic surfaces to change a surface's shape. You can move, rotate, shear, and scale a surface using the Axis menu. See Accessing the Axis Menu.
(a) Vertices on a bilinear surface
(a) Vertices and tangent handles on a bicubic surface
To move a handle on a bilinear or bicubic surface, click the handle that you want to edit. The selected handle appears in red. Use the cursor to drag the handle to its new position.
Each corner has two tangent handles. Lengthen or move the tangents to change the shape of the bicubic between corners.
All of the animation modifications you make to a shape are saved. If you decide to change a shape, then change it back to the original shape, your modifications are not lost.