Function
The SetDOD function limits the active area, or Domain of Definition (DOD), to a limited window. If you have a large element with only a small portion of non-black pixels, you can apply a SetDOD node to isolate the area and to speed all image processes.

Shake automatically assigns a DOD to an .iff image. For example, if you scale down an image, Shake limits the DOD to the scaled area. This remains in effect for later composites, but does not affect the current script.

You can procedurally access the DOD of an image with the following variables:

dod[0] Left edge of DOD
dod[1] Bottom edge of DOD
dod[2] Right edge of DOD
dod[3] Top edge of DOD.

For example, calling FileIn1.dod[0] will return the minimum X value of FileIn1's DOD.

Synopsis

image SetDOD( image,
  int left, 
  int right,
  int bottom, 
  int top
);

Script

image = SetDOD( image, 
        left, right, 
        bottom, top
);

Command Line

shake -setdod left right etc

See Also
Viewport, Window, Crop