2011

Affine transforms can be applied for free performance-wise, i.e. they can be
applied at the same time as the warps without slowing down the tools. By
combining transforms into a single resampling operation, the produced image
has less degradation than if separate transform and warp tools were used. In
addition, the combined transforms/warps approach is not susceptible to the
bottleneck issue. For example, specifying an Output transform that enlarges
the output image would give a completely different result that putting a resize
tools afterward. In the former approach, the image would be directly computed
at the final resolution, while in the latter approach the intermediate image
would be at a lower resolution and the lost information could never be
recovered.
Affine transforms allow integration with the tracker because the affine
transforms are expressed using socket names that the tracker recognizes. The
tracker can be accessed by right-clicking on the value editors or the
Input/Output/Effect UI Container label.
Since Warping tools can be keyframed, you can create dramatic changes in
image shapes when animated over time.
All Warping tools have masking inputs so you can limit the effect of the warp
to a precise area of the image.
All Warping tools have the following common parameters:
To translate the input image, warp effect, or output image:
➤ Do one of the following:
■ Type values into the X or Y Translation value editors and press Enter.
■ Drag the square found at the bottom left of the direct manipulator
along the X and Y axes. Note that you must have Manipulators selected
in the Display tab in Player Options.
2D Transforms | 479