TYPE: SOP
TITLE: Channel SOP

The Channel operation reads sample data from a CHOP and converts it into point
positions and point attributes. 

Parameters
    Group           - Modify only the points within this point group.
                      If blank, all points are modified.
    CHOP            - Retrieves the sample data from this CHOP.
    Method          - The sample data fetch method.
	Static      - Uses one channel for each attribute, and
		      all points use this channel (the first point
		      resides at index 0, the next at 1, and so on).
		      The length of the channels should be at least
		      the number of points modified.
	Animated    - Uses one channel per attribute per point.
		      The channels show the animation of each 
		      point's position/attribute values.
    Channel Scope   - The names to use for the newly modified 
                      attributes. There must be one name per attribute
                      (eg. an attribute scope of "P" should have a
                      channel scope with three names: tx ty tz).
    Attribute Scope - A string list of attributes to modify.
                      For only one component of an array, such as the Y value
                      of the point position, specify the number of elements
                      in brackets (in this case, P(1) would be used).

                      The common attributes are:
	P     - Point position (X, Y, Z), 3 values
	Pw    - Point weight, 1 value
	Cd    - Point color (red, green, blue), 3 values
	Alpha - Point alpha, 1 value
	N     - Point normal value (X, Y, Z), 3 values
	uv    - Point texture coordinates (U,V,W), 3 values
    Organize by Attribute (Applies to 'Animated Method' only) - Will
                      reorganize the fetched channels by the value of
                      this attribute.  A common example is the 'id'
                      attribute found in particles.  A channel is built for
                      each unique id since the number of points may vary.
