TYPE: CHOP
TITLE: PreTransform CHOP

This CHOP takes translate, rotate, and/or scale channels and transforms
them using the pretransform of the given object. It is primarily used remove
the pretransform of a destination object from the output of Object/Transform
CHOPs before exporting to the destination object. A combination of Object,
PreTransform, and Export CHOPs can be used to perform orientation constraints
in objects.

If no input is given, then channels are simply generated from the given
object's pretransform. If an input is given, the interpretation of the channels
as a transform are defined by the Input Transform Order, and Translate/Rotate/
Scale Scope parameters. Any missing transform channels from an input are filled
in using the default value of 1 for the scales, and 0 for all others. The input
transform is then right-multiplied by the (usually inverse) pretransform.

To affect only one set of channels coming into the CHOP, use the Scope
parameter.

There are no local variables.

Parameters
PreTransform
    Object                  - The name of the object to take the
			      pretransform from
    Invert PreTransform     - Invert the pretransform (This option should
			      be on to remove the pretransform from the
			      input channels.)
    Input Transform Order   - The transform order of the input channels
    Translate/Rotate/Scale/Pivot Scope  - The names of the input transform
					  channels

    Out Transform Order     - The transform order used to generate the
			      output channels
    Out Pivot		    - The pivot used to generate the output channels

Channel
    Channel Names   - The output channel names. This can be used to include
		      the object name in the generated channels.
    Channel Range   - Indicates how much of the channel to cook.
	Use Full Animation Range - All of the animated range.
	Use Current Frame        - Only the sample at the current frame.
	Use Start/End            - Specify the range below.
    Start           - The start time of the desired interval    /start
		      of the object path.
    End             - The end time of the desired interval      /end
		      of the object path.
    Extend Left     - The left extend conditions.
    Extend Right    - The right extend conditions.
    Default Value   - The default value for extend conditions.  /defval

See also: Object, Export, Transform
