TYPE: CHOP
TITLE: Blend CHOP

This CHOP combines two or more CHOPs in input 2, 3 and so on, by using a
set of blending channels in input 1. The blending channels cause different
strengths of the CHOPs to contribute to the output of the CHOP. It works like
the Blend SOP.

Input 1 acts as the control input, which contains the blend weight channels
for the rest of the inputs. In it there is one channel for each of the
blended CHOPs coming in on input 2, 3 and so on.

The first channel in input 1 is input 2's blend weight, the second channel in
input 1 is the input 3's blend weight, and so on. There should be as many
blend channels in input 1 as there are inputs, excluding input 1.

The interval of the output of the CHOP is the interval of input 1 (the blend
channels).

If input 2 onwards are just poses, it's OK, the CHOP blends between poses by
using extend conditions.

Advantages of Difference Method:

Each blend input affects the result without reducing the effect of the
others. You can exaggerate beyond each of the inputs by setting their blend
greater than 1, and you can go negative. When all blend channels are 0, you get
smooth transitions as any of the blend channels ease out of zero.

The Sample Rate Match options reside in the Common Tab.

There are no local variables.

Parameters
    Method - The blend method.
        Proportional - Each blend source contributes to the result
                          according to its blend weight. If the blend
                          weights do not add up to one, they are scaled
                          so that they do.
        Difference   - In this default behavior of the Blend CHOP,
                          the input 2 is always the "base". There are
                          blend channels for all the other inputs, and
                          when they are all zero, you get base. If any
                          one blend channel is 1 and the others are zero,
                          then your output is the same as the input that
                          corresponds to that blend channel.

    Omit First Weight Channel - When using the Differencing method, the
                                weight channel for the base input has no
                                effect, so the channel is omitted if this
                                option is on.

See also: Composite(comp), Interpolate(interp), Sequence
