[x3d-public] next, previous sequencer events

[Andreas Plesch]

Unlike Interolators, Sequencers have the ability to advance to the next
value in the keyValue array by receiving a true value to their next field.

http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/utils.html#X3DSequencerNode

has one and only one sentence defining this behaviour.

"triggers the next output value in keyValue array"

So what is the next output value ? Presumably, the next value relative the
value corresponding to the last received set_fraction value.

But what if there were two next events in a row ? Presumably, this would be
expected to step through all keyValues. Now the second next is not relative
to the last received set_fraction value but relative to the last
value_changed value.

So it seems that next and previous refers to last issued output
(value_changed).

I am fairly confident that this is the expected understanding. If this is
correct, perhaps an additional sentence in the spec. is warranted.

-Andreas

-- 
Andreas Plesch
39 Barbara Rd.
Waltham, MA 02453
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